Measurement of the W+W- cross section in sqrt(s) = 7 TeV pp collisions with ATLAS

Measurement of the W

+

W

−

cross section in

√

s = 7 TeV pp collisions with ATLAS

ATLAS Collaboration

This Letter presents a measurement of the W+W− production cross section in√s = 7 TeV pp collisions by the ATLAS experiment, using 34 pb−1of integrated luminosity produced by the Large Hadron Collider at CERN. Selecting events with two isolated leptons, each either an electron or a muon, 8 candidate events are observed with an expected background of 1.7 ± 0.6 events. The measured cross section is 41+20

−16(stat.) ± 5(syst.) ± 1(lumi.) pb, which is consistent with the standard

model prediction of 44 ± 3 pb calculated at next-to-leading order in QCD. PACS numbers: 14.70.Fm, 13.38.Be, 13.85.Qk

The W+W− process plays an important role in elec-troweak physics. The production rate and kinematic dis-tributions of W+_W− _{are sensitive to the triple gauge}

couplings of the W boson [1, 2] and W+_W− _production

is an important background to standard model Higgs bo-son searches. For these reabo-sons, the measurement of the W+_W− _{production cross section in 7 TeV pp collisions is}

a milestone in the Large Hadron Collider (LHC) physics program. W+_W− _{production has been previously}

mea-sured in both e+_e− _{collisions [1] and p¯p collisions [2],}

and was also recently measured in pp collisions [3]. In the standard model, the largest production mechanisms of W+W− proceed via s-channel and t-channel quark annihilation, followed by the gluon fusion process, which is next-to-next-to-leading order but is enhanced by the large gluon-gluon parton luminosity at the LHC.

Candidate W+W−events are reconstructed in the lep-tonic ``νν decay channel where each ` is either an elec-tron or a muon; included in this selection is W+_W−

pro-duction in which either or both W bosons decay to τ ν → `ννν. This channel provides a significantly better signal to background ratio than the semileptonic or hadronic channels. Events consistent with pp → W+_W−_{+ X →}

``νν + X are selected by requiring two reconstructed oppositely-charged leptons and a large transverse mo-mentum imbalance due to the neutrinos, which escape detection. There are four main backgrounds, all of com-parable size: (i) W +jets production with a jet misidenti-fied as a lepton; (ii) Drell-Yan production, which includes Z/γ∗ → `` where the observed momentum imbalance is due to mismeasurements and Z/γ∗→ τ τ → `` + 4ν; (iii) top production (t¯t and W t), which also produces two W bosons, but is not considered signal and is suppressed by vetoing candidates with jets; (iv) other diboson pro-cesses, which include W Z production decaying to ```ν where one charged lepton is lost, ZZ with one Z decay-ing to charged leptons and one Z decaydecay-ing to neutrinos, and W γ with the photon misidentified as an electron.

The ATLAS detector [4] has a cylindrical geometry [5] and consists of an inner tracking detector surrounded by a 2 T superconducting solenoid, electromagnetic and hadronic calorimeters, and a muon spectrometer with a toroidal magnetic field. The inner detector provides

pre-cision tracking for charged particles for |η| < 2.5. It con-sists of silicon pixel and strip detectors surrounded by a straw tube tracker that also provides transition radiation measurements for electron identification. The calorime-ter system covers the pseudorapidity range |η| < 4.9. For |η| < 2.5, the electromagnetic calorimeter is finely segmented and plays an important role in electron iden-tification. The muon spectrometer has separate trigger and high-precision tracking chambers covering |η| < 2.7. The transverse energy ETis defined to be E sin θ, where

E is the energy associated with a calorimeter cell or en-ergy cluster. Similarly, pT is the momentum component

transverse to the beam line.

A three-level trigger system selects events to record for offline analysis. During the data-taking period, the se-lections for at least one electron or muon were made pro-gressively stricter, culminating in an ET> 15 GeV single

electron or pT> 13 GeV single muon requirement. The

results presented here use a data sample corresponding to 34 pb−1 collected during 2010, where the subsystems described were operational.

The signal acceptance is determined from a detailed Monte Carlo simulation. The q ¯q → W+_W− _signal

is simulated up to next-to-leading order in QCD with mc@nlo [6] and the gluon fusion process is simulated with gg2ww [7]; the CTEQ6.6 [8] and CTEQ6M [9] par-ton distribution functions (PDFs), respectively, are used. herwig [10] is used to model W leptonic decays, parton showers, and hadronization, and jimmy [11] is used to simulate the underlying event. The detector response simulation [12] is based on the geant4 program [13]. For the table and figures in this Letter, the standard model expectation for the W+W− signal is normalized to 44 ± 3 pb, which is the sum of the quark annihilation (97%) and gluon fusion (3%) processes, as calculated by mc@nlo and gg2ww.

The luminosity in a single bunch-crossing was sufficient to produce multiple collisions, observed as multiple ver-tices, in the same recorded event. The vertex with the largest sum p2

Tof the associated tracks is selected as the

primary vertex. Additional inclusive pp collisions are also simulated to reproduce the vertex multiplicity observed in data.

Electrons are reconstructed from a combination of a track found in the inner detector and an electromag-netic calorimeter energy cluster with |η| < 1.37 or 1.52 < |η| < 2.47 to avoid the transition region between the bar-rel and the end-cap electromagnetic calorimeters. Can-didate electrons must satisfy the “tight” selection [14], which requires the following measured quantities to be consistent with those from a promptly produced electron: shower shape, ratio of energy deposited in the hadronic to electromagnetic calorimeters, inner-detector track qual-ity, track-to-shower matching, ratio of calorimeter energy measurement to track momentum, and transition radia-tion in the straw tube tracker. The electron is required to be isolated such that the sum of ETfor calorimeter

en-ergy in a cone of size ∆R ≡p∆η2+ ∆φ2 of 0.3 around the electron is less than 6 GeV, excluding energy asso-ciated with the electron cluster. The overall electron reconstruction and identification efficiency is measured from data using W → eν and Z → ee candidates. It varies from 78% for the central region (|η| < 0.8) to 64% in the forward region (2.0 < |η| < 2.47) with a statistical uncertainty of less than 0.4% and a systematic uncer-tainty of 5% [14] averaged over rapidity. The systematic uncertainty is due to background uncertainties in the W and Z samples and the consistency of efficiencies derived from the two samples.

Muon candidates are formed by associating muon spec-trometer (MS) tracks with inner detector (ID) tracks af-ter accounting for energy loss in the calorimeaf-ter. A com-mon transverse momentum is determined using a statis-tical combination of the two tracks and is required to have |η| < 2.4. To reject muons from charged π or K de-cays and charged particles from the beam-induced back-grounds, the MS muon pT must exceed 10 GeV and be

consistent with the ID measurement, |pID

T − p

MS T |/p

ID T <

0.5. To suppress muons originating from hadronic jets, the sum of the pT of other tracks with pT> 1 GeV in a

cone of ∆R = 0.2 around the muon candidate divided by the muon pTis required to be less than 0.1. The muon

reconstruction and isolation efficiencies are measured in data using Z → µµ candidates to obtain a combined effi-ciency of 92±1(stat)±1(syst)%, where the systematic un-certainty is dominated by variations between data-taking periods due to additional collisions in the events [14].

Jets used to discriminate top from W+W− produc-tion are reconstructed from calorimeter clusters using the anti-kT algorithm [15] with a resolution parameter

of R = 0.4. Jets within a ∆R < 0.3 of an electron are not used because the electrons are in general also recon-structed as jets. The jet energies are calibrated using ET

-and η-dependent correction factors [16] based on simula-tion and validated by test beam and collision data.

In order to suppress the Drell-Yan background, a mo-mentum imbalance of the visible collision products in the plane transverse to the beam axis is required. For this purpose, missing transverse energy is defined as

~

Emiss_T = −P_~

ET, where ~ET indicate the 2-dimensional

transverse vectors for the reconstructed clusters of en-ergy in the calorimeter in the range |η| < 4.5 and muon momenta. Since the ~Emiss

T variable is sensitive to the

mis-measurement of an individual lepton or jet, the relative missing transverse energy is defined as

E_T,relmiss = E

miss

T × sin (∆φ) if ∆φ < π/2

E_Tmiss if ∆φ ≥ π/2,

where ∆φ is the difference in the azimuthal angle φ be-tween ~E_Tmissand the nearest lepton or jet. This definition allows events to be removed when ~E_Tmiss points along a lepton direction, which occurs when the lepton momen-tum is measured lower than the true value or, for events with the two leptons moving in approximately opposite directions, higher than the true value. This generally reduces the contribution from mismeasured leptons giv-ing a higher signal to background ratio than a direct re-quirement on | ~Emiss

T |. Two important cases are high-mass

muonic Drell-Yan events, where the momentum resolu-tion can be comparable to | ~Emiss

T | in W+W−events, and

Z → τ τ , where the real ~Emiss

T from leptonic τ decays is

parallel to the momenta of the leptons.

Candidates are selected with two opposite-sign charged leptons with pT > 20 GeV. The leptons are required to

be consistent with coming from a primary vertex with at least three associated tracks, which makes the cosmic ray background negligible. For the ee and µµ final states, the resulting sample is dominantly Z → ee and Z → µµ events, while eµ candidates are a mix of Z → τ τ , t¯t, and other backgrounds. In order to suppress Z/γ∗→ ee and Z/γ∗ → µµ, ee and µµ events with an invariant mass near the Z mass, |m``− mZ| < 10 GeV, or m`` <

15 GeV are removed and the remainder are required to have E_T,relmiss > 40 GeV. For eµ events, a less stringent requirement Emiss

T,rel > 20 GeV is made. In order to

sup-press the t¯t contribution, candidates containing jets with pT > 20 GeV and |η| < 3 are removed. Figure 1 shows

the E_T,relmiss distributions separately for same-flavor (ee and µµ) and eµ events with all selections applied except for the Emiss_T,rel requirement; also shown is the number of jets with pT> 20 GeV after final selection except for the jet

veto requirement. In all three distributions, the data in the background regions are in agreement with the stan-dard model expectation and the signal is clearly visible.

The acceptance, which converts the observed yield in the kinematically restricted signal region to the inclusive W+_W− _{cross section, is derived from simulation and is}

corrected with scale factors based on measurements in independent data samples. The scale factors correct for the difference in trigger, lepton reconstruction and iden-tification, and jet-veto efficiencies between data and sim-ulation. The efficiency to pass the trigger criteria is close to unity and has small statistical and systematic uncer-tainties. For the lepton reconstruction and identification,

[GeV] miss T, rel E 0 20 40 60 80 100 120 140 Events / 10 GeV -1 10 1 10 2 10 3 10

ATLAS

∫

Ldt = 34 pb-1 =7TeV s _Data Drell-Yan QCD jet Diboson W+jets top ν e ν e → WW ν µ ν µ + [GeV] miss T, rel E 0 20 40 60 80 100 120 140 Events / 10 GeV 1 10 -1 Ldt = 34 pb

∫

ATLAS

=7TeV s _Data Drell-Yan QCD jet Diboson W+jets top ν µ ν e → WW Jet Multiplicity 0 1 2 3 4 5 6 7 8 9 10 Events 0 5 10 15 20 25 30 35 -1 Ldt = 34 pb

∫

ATLAS

=7TeV s Data Drell-Yan QCD jet Diboson W+jets top ν l ν l → WW FIG. 1. Emiss

T,reldistributions for the selected ee and µµ (left) and eµ (center) events and the multiplicity distribution for jets with

pT> 20 GeV and |η| < 3.0 for all three dilepton channels combined (right). The distributions show events with all selection

criteria applied except for ET,relmiss in the ET,relmiss distribution and the jet veto in the jet multiplicity distribution. Simulation is

used for the QCD jet and W +jets background contributions in these plots as opposed to the data-driven method used for W +jets in the signal region described in the text. The QCD jet contribution is negligible in the signal region.

the scale factors differ from unity by at most a few per-cent, indicating the accuracy of the simulation, and have systematic uncertainties derived from the efficiency mea-surements described above. A small smearing is added to the muon pT in simulation, so that it replicates the

Z → µµ invariant mass distribution in data. The accep-tance uncertainty due to the PDF uncertainties is 1.2%. There are two major sources of systematic uncertainty in the jet-veto efficiency. The first is the modeling of jet production in association with W+_W− _{due to}

ini-tial state radiation, radiation from the internal line in the t-channel diagram, and additional parton collisions in the same pp collision. The second is the jet-energy scale, which is the correspondence between the true par-ticle jet pT and the reconstructed jet pT. To minimize

the systematic uncertainty due to these two effects, con-trol samples of Z → `` are used. These are sufficiently large and pure that the jet-veto efficiency can be directly measured and compared to simulation using the same QCD modeling as the W+W− signal. The ratio of the observed to the simulated zero-jet fraction in the Z → `` sample to simulation is used to define a jet-veto scale factor of 0.97 ± 0.06. The uncertainty is due to differ-ences between the jet-veto efficiency in Z and W+_W−

events which is assessed including effects from the choice of renormalization and fragmentation scales [17].

The overall selection acceptances for signal events are 4.1 ± 0.1% for eνeν, 8.6 ± 0.1% for µνµν, and 11.5 ± 0.6% for eνµν. The relative acceptance in event selection are lepton acceptance and identification (18%, 41%, 27%) and the mll(85%, 84%, 100%), ET,relmiss (41%, 43%, 69%),

and jet-veto (64%, 59%, 61%) requirements, where the three percentages indicate the ee, µµ, and eµ channels, respectively, and each factor is relative to the previous requirement. The contributions from W+_W−

produc-tion where one or both W bosons decays to a τ which subsequently decays to an e or µ are less than 10% of the final selected W+_W−_{signal events in all three channels.}

With the exception of W +jets, the backgrounds are derived from simulations, corrected with the same scale factors as applied to the modeling of the signal accep-tance. The backgrounds are scaled to the data sample based on the integrated luminosity and predicted cross sections. The top and W Z processes are simulated with mc@nlo, the ZZ process is simulated with herwig, the W γ is simulated with madgraph+pythia [18, 19], and the Drell-Yan process is simulated with alpgen [20] and pythia [18]. The QCD jet contribution, which is not significant after the E_T,relmiss _{cut, is modeled with pythia} in Figure 1.

Like the signal acceptance, the background estimates have uncertainties due to the trigger, lepton reconstruc-tion and identificareconstruc-tion, and jet-veto efficiencies, in ad-dition to the uncertainties on the integrated luminosity and theoretical cross sections. The Drell-Yan and top background estimates have additional uncertainties de-scribed below. Most of the Drell-Yan events are removed by the dilepton invariant mass and E_T,relmiss requirements, but because of the large cross section some remain as background. The uncertainty on this background due to the simulation of Emiss

T,relis assessed using a control sample

of Z/γ∗→ ee and Z/γ∗_{→ µµ events in the Z mass peak}

region, |m``− mZ| < 10 GeV, passing a relaxed

require-ment of Emiss

T,rel > 30 GeV. Despite the E miss

T,relrequirement,

this sample is still dominated by Z → `` events in which the observed momentum imbalance is due to a combi-nation of detector resolution, limited detector coverage, and neutrinos from heavy flavor decays. A 64% system-atic uncertainty is assigned based on the difference be-tween the observed yield in data and the Monte Carlo prediction, which are statistically consistent.

The top background arises from t¯t and W t produc-tion where the two W bosons decay leptonically. Sim-ulation based on mc@nlo is used to estimate the num-ber of events passing the jet-veto requirement. Similar to the signal acceptance, there are two important

sys-TABLE I. Summary of observed events and expected standard model signal and background contributions in the three dilepton channels and their combination. The first uncertainty is statistical, the second systematic.

Final State e+e−ET,relmiss µ +

µ−ET,relmiss e ±

µ∓ET,relmiss Combined

Observed Events 1 2 5 8 Expected W+W− 0.79 ± 0.02 ± 0.09 1.61 ± 0.04 ± 0.14 4.45 ± 0.06 ± 0.44 6.85 ± 0.07 ± 0.66 Backgrounds Drell-Yan 0.00 ± 0.10 ± 0.07 0.01 ± 0.10 ± 0.07 0.22 ± 0.06 ± 0.15 0.23 ± 0.15 ± 0.17 W Z, ZZ, W γ 0.05 ± 0.01 ± 0.01 0.10 ± 0.01 ± 0.01 0.23 ± 0.05 ± 0.02 0.38 ± 0.04 ± 0.04 W +jets 0.08 ± 0.05 ± 0.03 0.00 ± 0.29 ± 0.10 0.46 ± 0.12 ± 0.17 0.54 ± 0.32 ± 0.21 Top 0.04 ± 0.02 ± 0.02 0.14 ± 0.06 ± 0.07 0.35 ± 0.10 ± 0.19 0.53 ± 0.12 ± 0.28 Total Background 0.17 ± 0.11 ± 0.08 0.25 ± 0.31 ± 0.15 1.26 ± 0.17 ± 0.31 1.68 ± 0.37 ± 0.42

tematic uncertainties on the veto efficiency: the jet-energy scale and the amount of initial and final state radiation (ISR/FSR). The jet-energy calibration uncer-tainty [16] corresponds to a 40% change in the top back-ground. The uncertainty due to the ISR/FSR modeling is estimated using the AcerMC [21] generator interfaced to pythia [18], and varying the parameters controlling ISR and FSR in a range consistent with experimental data [22]. The resulting uncertainty of 32% is a combi-nation of the shift in the prediction and the statistical uncertainty on the simulation.

W bosons produced in association with a jet that is misidentified as a lepton contribute to the selected sam-ple. The rate at which hadronic jets are misidentified as leptons may not be accurately described in the sim-ulation, because these events are due to rare fragmen-tation processes or interactions with the detector. This background is therefore determined from data using con-trol samples dominated by W +jets events and subtract-ing all other components ussubtract-ing simulation. _The alp-gen+herwig+jimmy simulation of the W +jets back-ground used in Figure 1 gives comparable results to this method. The W +jets data samples are constructed by requiring one electron or muon passing the full selection criteria and a lepton-like jet, which is a reconstructed electron or muon that is selected as likely to be due to a jet. For electrons, the lepton-like jets are electromagnetic clusters matched to tracks in the inner detector that fail the full electron selection. For muons, lepton-like jets are muon candidates that fail at least one of the requirements on isolation, distance from the primary vertex, or ID and MS consistency. These events are otherwise required to pass the full event selection, treating the lepton-like jet as if it were a fully identified lepton.

The W +jets background is then estimated by scaling this control sample by a measured pT-dependent factor

f . The factor f is the ratio of the probability for a jet to satisfy the full lepton identification criteria to the prob-ability to satisfy the lepton-like jet criteria. The factor f is measured in a QCD jet data sample and corrected for the small contribution of true leptons to the sample using simulation. The systematic uncertainty on f is 36% for both electrons and muons, and is determined from

vari-ations of f in different run periods and in data samples containing jets of different energies, which covers differ-ences in the quark/gluon composition between the jets in the QCD jet and W + jets data samples.

The resulting signal and background expectations are shown in Table I. Eight events are observed in the data with a total expected background of 1.7 ± 0.6 events. As shown in Figure 2, the kinematic properties of the observed events are qualitatively consistent with the standard model expectation. To estimate the statisti-cal significance of the signal, Poisson-distributed pseudo-experiments are generated, varying the expected back-ground according to its uncertainty. The probability to observe 8 or more events in the absence of a signal is 1.2×10−3, which corresponds to a significance of 3.0 stan-dard deviations. The W+W−production cross section is determined using a maximum likelihood fitting method to combine the three dilepton channels. A cross section of σW+_W− = 41+20₋₁₆(stat.)±5(syst.)±1(lumi.) pb is

mea-sured. The luminosity uncertainty for this measurement is 3.4% [23]. The total systematic uncertainty (11.5%) includes the signal acceptance and efficiency (∆A/A = 7.4%) and background estimation (∆Nb/Nb = 33%)

un-certainties. The dominant systematics uncertainties are due to the jet-veto (7.5%), and the lepton selection and identification (4.3%)

The measured W+W− production cross section is in good agreement with the standard model prediction of 44 ± 3 pb calculated at next-to-leading order in QCD and the recent measurement by CMS [3]. With the sig-nificantly larger integrated luminosities expected to be provided by the LHC, this signal will form the basis of a research program that will include searches for the stan-dard model Higgs boson, anomalous triple gauge cou-plings, and other processes beyond the standard model.

ACKNOWLEDGEMENTS

We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina;

(leading lepton) [GeV] T p 50 100 Events / 10 GeV 0 2 4 Data WW Bkg ∫_{Ldt = 34pb}-1 ATLAS s=7TeV ) [GeV] -l + (l T p 0 50 100 Events / 20 GeV 0 5 10 Data WW Bkg ∫_{Ldt = 34pb}-1 ATLAS s=7TeV ) -l + (l φ ∆ 0 1 2 3 Events / 0.4 0 2 4 6 Data WW Bkg ∫_{Ldt = 34pb}-1 ATLAS s=7TeV

FIG. 2. Distributions of the leading lepton pT (left),

trans-verse momentum of the dilepton system (center), and az-imuthal angle between the leptons (right) for the sum of the selected ee, µµ and eµ samples compared to the expectation. The gray band indicates the combined statistical and system-atic uncertainty on the sum of the signal and background expectations.

YerPhI, Armenia; ARC, Australia; BMWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CON-ICYT, Chile; CAS, MOST and NSFC, China; COL-CIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; ARTEMIS, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNAS, Geor-gia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT, Greece; ISF, MINERVA, GIF, DIP and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW, Poland; GRICES and FCT, Portugal; MERYS (MECTS), Romania; MES of Rus-sia and ROSATOM, RusRus-sian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MVZT, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Can-tons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Lever-hulme Trust, United Kingdom; DOE and NSF, United States of America.

The crucial computing support from all WLCG part-ners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF

(Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Tai-wan), RAL (UK) and BNL (USA) and in the Tier-2 fa-cilities worldwide.

[1] ALEPH Collaboration, Phys. Lett. B 484, 205 (2000); DELPHI Collaboration, Phys. Lett. B 479, 89 (2000); L3 Collaboration, Phys. Lett. B 496, 19 (2000); OPAL Collaboration, Phys. Lett. B 493, 249 (2000).

[2] CDF Collaboration, Phys. Rev. Lett. 104, 201801 (2010); DØ Collaboration, Phys. Rev. Lett. 103, 191801 (2009). [3] CMS Collaboration, arXiv:hep-ex/1102.5429.

[4] ATLAS Collaboration, JINST 3, S08003 (2008). [5] ATLAS uses a right-handed coordinate system with its

origin at the nominal interaction point (IP) in the centre of the detector and the z-axis along the beam pipe. The x-axis points from the IP to the centre of the LHC ring, and the y axis points upward. Cylindrical coordinates (r, φ) are used in the transverse plane, φ being the azimuthal angle around the beam pipe. The pseudorapidity is de-fined in terms of the polar angle θ as η = − ln tan(θ/2). [6] S. Frixione and B. R. Webber, J. High Energy Phys.

0206, 029 (2002).

[7] T. Binoth, M. Ciccolini, N. Kauer, and M. Kr¨amer, J. High Energy Phys. 0612, 046 (2006).

[8] P. M. Nadolsky et al., Phys. Rev. D78, 013004 (2008). [9] J. Pumplin et al., J. High Energy Phys. 0207, 012 (2002). [10] G. Corcella et al., J. High Energy Phys. 0101, 010 (2001). [11] J. M. Butterworth et al., Z. Phys. C72, 637 (1996). [12] ATLAS Collaboration, Eur. Phys. J. C70, 823 (2010). [13] S. Agostinelli et al., Nucl.Instrum.Meth. A506, 250

(2003).

[14] ATLAS Collaboration, J. High Energy Phys. 1012, 060 (2010).

[15] M. Cacciari, G. P. Salam, and G. Soyez, J. High Energy Phys. 0804, 063 (2008); M. Cacciari and G. P. Salam, Phys. Lett. B641 (2006).

[16] ATLAS Collaboration, Eur. Phys. J. C 71, 1512 (2011). [17] J. M. Campbell et al., Phys. Rev. D80, 054023 (2009). [18] T. Sjostrand, S. Mrenna and P. Skands, J. High Energy

Phys. 0605, 026 (2006).

[19] J. Alwall et al., J. High Energy Phys. 0709 028, (2007) [20] M. L. Mangano et al., J. High Energy Phys. 0307, 001

(2003).

[21] B. P. Kersevan and E. Richter-W¸as, arXiv:hep-ph/0405247.

[22] P. Z. Skands, Phys. Rev. D 82, 074018 (2010).

[23] ATLAS Collaboration, ATLAS-CONF-2011-011, http://cdsweb.cern.ch/record/1334563.

The ATLAS Collaboration

G. Aad48_{, B. Abbott}111_{, J. Abdallah}11_{, A.A. Abdelalim}49_{, A. Abdesselam}118_{, O. Abdinov}10_{, B. Abi}112_,

M. Abolins88_{, H. Abramowicz}153_{, H. Abreu}115_{, E. Acerbi}89a,89b_{, B.S. Acharya}164a,164b_{, D.L. Adams}24_{, T.N. Addy}56_,

J. Adelman175_{, M. Aderholz}99_{, S. Adomeit}98_{, P. Adragna}75_{, T. Adye}129_{, S. Aefsky}22_{, J.A. Aguilar-Saavedra}124b,a_,

M. Aharrouche81_{, S.P. Ahlen}21_{, F. Ahles}48_{, A. Ahmad}148_{, M. Ahsan}40_{, G. Aielli}133a,133b_{, T. Akdogan}18a_,

T.P.A. ˚Akesson79_{, G. Akimoto}155_{, A.V. Akimov}94_{, A. Akiyama}67_{, M.S. Alam}1_{, M.A. Alam}76_{, S. Albrand}55_,

M. Alhroob20, M. Aliev15, G. Alimonti89a, J. Alison120, M. Aliyev10, P.P. Allport73, S.E. Allwood-Spiers53, J. Almond82, A. Aloisio102a,102b, R. Alon171, A. Alonso79, M.G. Alviggi102a,102b, K. Amako66, P. Amaral29,

C. Amelung22, V.V. Ammosov128, A. Amorim124a,b, G. Amor´os167, N. Amram153, C. Anastopoulos139, T. Andeen34, C.F. Anders20_{, K.J. Anderson}30_{, A. Andreazza}89a,89b_{, V. Andrei}58a_{, M-L. Andrieux}55_{, X.S. Anduaga}70_,

A. Angerami34_{, F. Anghinolfi}29_{, N. Anjos}124a_{, A. Annovi}47_{, A. Antonaki}8_{, M. Antonelli}47_{, S. Antonelli}19a,19b_,

A. Antonov96_{, J. Antos}144b_{, F. Anulli}132a_{, S. Aoun}83_{, L. Aperio Bella}4_{, R. Apolle}118_{, G. Arabidze}88_{, I. Aracena}143_,

Y. Arai66_{, A.T.H. Arce}44_{, J.P. Archambault}28_{, S. Arfaoui}29,c_{, J-F. Arguin}14_{, E. Arik}18a,∗_{, M. Arik}18a_,

A.J. Armbruster87_{, O. Arnaez}81_{, C. Arnault}115_{, A. Artamonov}95_{, G. Artoni}132a,132b_{, D. Arutinov}20_{, S. Asai}155_,

R. Asfandiyarov172_{, S. Ask}27_{, B. ˚Asman}146a,146b_{, L. Asquith}5_{, K. Assamagan}24_{, A. Astbury}169_{, A. Astvatsatourov}52_,

G. Atoian175_{, B. Aubert}4_{, B. Auerbach}175_{, E. Auge}115_{, K. Augsten}127_{, M. Aurousseau}145a_{, N. Austin}73_,

R. Avramidou9_{, D. Axen}168_{, C. Ay}54_{, G. Azuelos}93,d_{, Y. Azuma}155_{, M.A. Baak}29_{, G. Baccaglioni}89a_,

C. Bacci134a,134b_{, A.M. Bach}14_{, H. Bachacou}136_{, K. Bachas}29_{, G. Bachy}29_{, M. Backes}49_{, M. Backhaus}20_,

E. Badescu25a_{, P. Bagnaia}132a,132b_{, S. Bahinipati}2_{, Y. Bai}32a_{, D.C. Bailey}158_{, T. Bain}158_{, J.T. Baines}129_,

O.K. Baker175, M.D. Baker24, S. Baker77, F. Baltasar Dos Santos Pedrosa29, E. Banas38, P. Banerjee93, Sw. Banerjee169, D. Banfi29, A. Bangert137, V. Bansal169, H.S. Bansil17, L. Barak171, S.P. Baranov94, A. Barashkou65, A. Barbaro Galtieri14, T. Barber27, E.L. Barberio86, D. Barberis50a,50b, M. Barbero20, D.Y. Bardin65, T. Barillari99, M. Barisonzi174, T. Barklow143, N. Barlow27, B.M. Barnett129, R.M. Barnett14, A. Baroncelli134a, A.J. Barr118, F. Barreiro80, J. Barreiro Guimar˜aes da Costa57, P. Barrillon115, R. Bartoldus143, A.E. Barton71_{, D. Bartsch}20_{, V. Bartsch}149_{, R.L. Bates}53_{, L. Batkova}144a_{, J.R. Batley}27_{, A. Battaglia}16_,

M. Battistin29_{, G. Battistoni}89a_{, F. Bauer}136_{, H.S. Bawa}143,e_{, B. Beare}158_{, T. Beau}78_{, P.H. Beauchemin}118_,

R. Beccherle50a_{, P. Bechtle}41_{, H.P. Beck}16_{, M. Beckingham}48_{, K.H. Becks}174_{, A.J. Beddall}18c_{, A. Beddall}18c_,

S. Bedikian175_{, V.A. Bednyakov}65_{, C.P. Bee}83_{, M. Begel}24_{, S. Behar Harpaz}152_{, P.K. Behera}63_{, M. Beimforde}99_,

C. Belanger-Champagne166_{, P.J. Bell}49_{, W.H. Bell}49_{, G. Bella}153_{, L. Bellagamba}19a_{, F. Bellina}29_{, M. Bellomo}119a_,

A. Belloni57_{, O. Beloborodova}107_{, K. Belotskiy}96_{, O. Beltramello}29_{, S. Ben Ami}152_{, O. Benary}153_,

D. Benchekroun135a_{, C. Benchouk}83_{, M. Bendel}81_{, B.H. Benedict}163_{, N. Benekos}165_{, Y. Benhammou}153_,

D.P. Benjamin44_{, M. Benoit}115_{, J.R. Bensinger}22_{, K. Benslama}130_{, S. Bentvelsen}105_{, D. Berge}29_,

E. Bergeaas Kuutmann41_{, N. Berger}4_{, F. Berghaus}169_{, E. Berglund}49_{, J. Beringer}14_{, K. Bernardet}83_{, P. Bernat}77_,

R. Bernhard48_{, C. Bernius}24_{, T. Berry}76_{, A. Bertin}19a,19b_{, F. Bertinelli}29_{, F. Bertolucci}122a,122b_{, M.I. Besana}89a,89b_,

N. Besson136, S. Bethke99, W. Bhimji45, R.M. Bianchi29, M. Bianco72a,72b, O. Biebel98, S.P. Bieniek77, J. Biesiada14, M. Biglietti134a,134b, H. Bilokon47, M. Bindi19a,19b, S. Binet115, A. Bingul18c, C. Bini132a,132b, C. Biscarat177, U. Bitenc48, K.M. Black21, R.E. Blair5, J.-B. Blanchard115, G. Blanchot29, T. Blazek144a, C. Blocker22, J. Blocki38, A. Blondel49, W. Blum81, U. Blumenschein54, G.J. Bobbink105, V.B. Bobrovnikov107, S.S. Bocchetta79, A. Bocci44, C.R. Boddy118, M. Boehler41, J. Boek174, N. Boelaert35, S. B¨oser77, J.A. Bogaerts29, A. Bogdanchikov107,

A. Bogouch90,∗_{, C. Bohm}146a_{, V. Boisvert}76_{, T. Bold}163,f_{, V. Boldea}25a_{, N.M. Bolnet}136_{, M. Bona}75_,

V.G. Bondarenko96_{, M. Boonekamp}136_{, G. Boorman}76_{, C.N. Booth}139_{, S. Bordoni}78_{, C. Borer}16_{, A. Borisov}128_,

G. Borissov71_{, I. Borjanovic}12a_{, S. Borroni}132a,132b_{, K. Bos}105_{, D. Boscherini}19a_{, M. Bosman}11_{, H. Boterenbrood}105_,

D. Botterill129_{, J. Bouchami}93_{, J. Boudreau}123_{, E.V. Bouhova-Thacker}71_{, C. Boulahouache}123_{, C. Bourdarios}115_,

N. Bousson83_{, A. Boveia}30_{, J. Boyd}29_{, I.R. Boyko}65_{, N.I. Bozhko}128_{, I. Bozovic-Jelisavcic}12b_{, J. Bracinik}17_,

A. Braem29_{, P. Branchini}134a_{, G.W. Brandenburg}57_{, A. Brandt}7_{, G. Brandt}15_{, O. Brandt}54_{, U. Bratzler}156_,

B. Brau84_{, J.E. Brau}114_{, H.M. Braun}174_{, B. Brelier}158_{, J. Bremer}29_{, R. Brenner}166_{, S. Bressler}152_{, D. Breton}115_,

D. Britton53_{, F.M. Brochu}27_{, I. Brock}20_{, R. Brock}88_{, T.J. Brodbeck}71_{, E. Brodet}153_{, F. Broggi}89a_{, C. Bromberg}88_,

G. Brooijmans34_{, W.K. Brooks}31b_{, G. Brown}82_{, H. Brown}7_{, E. Brubaker}30_{, P.A. Bruckman de Renstrom}38_,

D. Bruncko144b_{, R. Bruneliere}48_{, S. Brunet}61_{, A. Bruni}19a_{, G. Bruni}19a_{, M. Bruschi}19a_{, T. Buanes}13_{, F. Bucci}49_,

J. Buchanan118, N.J. Buchanan2, P. Buchholz141, R.M. Buckingham118, A.G. Buckley45, S.I. Buda25a, I.A. Budagov65, B. Budick108, V. B¨uscher81, L. Bugge117, D. Buira-Clark118, O. Bulekov96, M. Bunse42,

T. Buran117, H. Burckhart29, S. Burdin73, T. Burgess13, S. Burke129, E. Busato33, P. Bussey53, C.P. Buszello166, F. Butin29, B. Butler143, J.M. Butler21, C.M. Buttar53, J.M. Butterworth77, W. Buttinger27, T. Byatt77, S. Cabrera Urb´an167, D. Caforio19a,19b, O. Cakir3a, P. Calafiura14, G. Calderini78, P. Calfayan98, R. Calkins106, L.P. Caloba23a, R. Caloi132a,132b_{, D. Calvet}33_{, S. Calvet}33_{, R. Camacho Toro}33_{, A. Camard}78_{, P. Camarri}133a,133b_,

M. Cambiaghi119a,119b_{, D. Cameron}117_{, J. Cammin}20_{, S. Campana}29_{, M. Campanelli}77_{, V. Canale}102a,102b_,

F. Canelli30_{, A. Canepa}159a_{, J. Cantero}80_{, L. Capasso}102a,102b_{, M.D.M. Capeans Garrido}29_{, I. Caprini}25a_,

M. Caprini25a_{, D. Capriotti}99_{, M. Capua}36a,36b_{, R. Caputo}148_{, C. Caramarcu}25a_{, R. Cardarelli}133a_{, T. Carli}29_,

G. Carlino102a_{, L. Carminati}89a,89b_{, B. Caron}159a_{, S. Caron}48_{, G.D. Carrillo Montoya}172_{, A.A. Carter}75_,

J.R. Carter27_{, J. Carvalho}124a,g_{, D. Casadei}108_{, M.P. Casado}11_{, M. Cascella}122a,122b_{, C. Caso}50a,50b,∗_,

A.M. Castaneda Hernandez172_{, E. Castaneda-Miranda}172_{, V. Castillo Gimenez}167_{, N.F. Castro}124a_{, G. Cataldi}72a_,

P. Cavalleri78, D. Cavalli89a, M. Cavalli-Sforza11, V. Cavasinni122a,122b, A. Cazzato72a,72b, F. Ceradini134a,134b, A.S. Cerqueira23a, A. Cerri29, L. Cerrito75, F. Cerutti47, S.A. Cetin18b, F. Cevenini102a,102b, A. Chafaq135a,

D. Chakraborty106, K. Chan2, B. Chapleau85, J.D. Chapman27, J.W. Chapman87, E. Chareyre78, D.G. Charlton17, V. Chavda82_{, S. Cheatham}71_{, S. Chekanov}5_{, S.V. Chekulaev}159a_{, G.A. Chelkov}65_{, M.A. Chelstowska}104_{, C. Chen}64_,

H. Chen24_{, L. Chen}2_{, S. Chen}32c_{, T. Chen}32c_{, X. Chen}172_{, S. Cheng}32a_{, A. Cheplakov}65_{, V.F. Chepurnov}65_,

R. Cherkaoui El Moursli135e_{, V. Chernyatin}24_{, E. Cheu}6_{, S.L. Cheung}158_{, L. Chevalier}136_{, G. Chiefari}102a,102b_,

L. Chikovani51_{, J.T. Childers}58a_{, A. Chilingarov}71_{, G. Chiodini}72a_{, M.V. Chizhov}65_{, G. Choudalakis}30_,

S. Chouridou137_{, I.A. Christidi}77_{, A. Christov}48_{, D. Chromek-Burckhart}29_{, M.L. Chu}151_{, J. Chudoba}125_,

G. Ciapetti132a,132b_{, K. Ciba}37_{, A.K. Ciftci}3a_{, R. Ciftci}3a_{, D. Cinca}33_{, V. Cindro}74_{, M.D. Ciobotaru}163_,

C. Ciocca19a,19b_{, A. Ciocio}14_{, M. Cirilli}87_{, M. Ciubancan}25a_{, A. Clark}49_{, P.J. Clark}45_{, W. Cleland}123_,

J.C. Clemens83_{, B. Clement}55_{, C. Clement}146a,146b_{, R.W. Clifft}129_{, Y. Coadou}83_{, M. Cobal}164a,164c_,

A. Coccaro50a,50b_{, J. Cochran}64_{, P. Coe}118_{, J.G. Cogan}143_{, J. Coggeshall}165_{, E. Cogneras}177_{, C.D. Cojocaru}28_,

J. Colas4_{, A.P. Colijn}105_{, C. Collard}115_{, N.J. Collins}17_{, C. Collins-Tooth}53_{, J. Collot}55_{, G. Colon}84_{, P. Conde}

Mui˜no124a, E. Coniavitis118, M.C. Conidi11, M. Consonni104, S. Constantinescu25a, C. Conta119a,119b,

F. Conventi102a,h, J. Cook29, M. Cooke14, B.D. Cooper77, A.M. Cooper-Sarkar118, N.J. Cooper-Smith76, K. Copic34, T. Cornelissen50a,50b, M. Corradi19a, F. Corriveau85,i, A. Cortes-Gonzalez165, G. Cortiana99, G. Costa89a,

M.J. Costa167, D. Costanzo139, T. Costin30, D. Cˆot´e29, R. Coura Torres23a, L. Courneyea169, G. Cowan76,

C. Cowden27, B.E. Cox82, K. Cranmer108, F. Crescioli122a,122b, M. Cristinziani20, G. Crosetti36a,36b, R. Crupi72a,72b, S. Cr´ep´e-Renaudin55_{, C.-M. Cuciuc}25a_{, C. Cuenca Almenar}175_{, T. Cuhadar Donszelmann}139_{, S. Cuneo}50a,50b_,

M. Curatolo47_{, C.J. Curtis}17_{, P. Cwetanski}61_{, H. Czirr}141_{, Z. Czyczula}117_{, S. D’Auria}53_{, M. D’Onofrio}73_,

A. D’Orazio132a,132b_{, A. Da Rocha Gesualdi Mello}23a_{, P.V.M. Da Silva}23a_{, C. Da Via}82_{, W. Dabrowski}37_,

A. Dahlhoff48_{, T. Dai}87_{, C. Dallapiccola}84_{, M. Dam}35_{, M. Dameri}50a,50b_{, D.S. Damiani}137_{, H.O. Danielsson}29_,

D. Dannheim99_{, V. Dao}49_{, G. Darbo}50a_{, G.L. Darlea}25b_{, C. Daum}105_{, J.P. Dauvergne}29_{, W. Davey}86_,

T. Davidek126_{, N. Davidson}86_{, R. Davidson}71_{, M. Davies}93_{, A.R. Davison}77_{, E. Dawe}142_{, I. Dawson}139_,

J.W. Dawson5,∗_{, R.K. Daya}39_{, K. De}7_{, R. de Asmundis}102a_{, S. De Castro}19a,19b_{, P.E. De Castro Faria Salgado}24_,

S. De Cecco78_{, J. de Graat}98_{, N. De Groot}104_{, P. de Jong}105_{, C. De La Taille}115_{, H. De la Torre}80_,

B. De Lotto164a,164c_{, L. De Mora}71_{, L. De Nooij}105_{, M. De Oliveira Branco}29_{, D. De Pedis}132a_{, P. de Saintignon}55_,

A. De Salvo132a_{, U. De Sanctis}164a,164c_{, A. De Santo}149_{, J.B. De Vivie De Regie}115_{, S. Dean}77_{, D.V. Dedovich}65_,

J. Degenhardt120, M. Dehchar118, M. Deile98, C. Del Papa164a,164c, J. Del Peso80, T. Del Prete122a,122b,

A. Dell’Acqua29, L. Dell’Asta89a,89b, M. Della Pietra102a,h, D. della Volpe102a,102b, M. Delmastro29, P. Delpierre83, N. Delruelle29, P.A. Delsart55, C. Deluca148, S. Demers175, M. Demichev65, B. Demirkoz11,j, J. Deng163,

S.P. Denisov128, D. Derendarz38, J.E. Derkaoui135d, F. Derue78, P. Dervan73, K. Desch20, E. Devetak148, P.O. Deviveiros158, A. Dewhurst129, B. DeWilde148, S. Dhaliwal158, R. Dhullipudi24,k, A. Di Ciaccio133a,133b, L. Di Ciaccio4_{, A. Di Girolamo}29_{, B. Di Girolamo}29_{, S. Di Luise}134a,134b_{, A. Di Mattia}88_{, B. Di Micco}29_,

R. Di Nardo133a,133b_{, A. Di Simone}133a,133b_{, R. Di Sipio}19a,19b_{, M.A. Diaz}31a_{, F. Diblen}18c_{, E.B. Diehl}87_{, H. Dietl}99_,

J. Dietrich48_{, T.A. Dietzsch}58a_{, S. Diglio}115_{, K. Dindar Yagci}39_{, J. Dingfelder}20_{, C. Dionisi}132a,132b_{, P. Dita}25a_,

S. Dita25a_{, F. Dittus}29_{, F. Djama}83_{, R. Djilkibaev}108_{, T. Djobava}51_{, M.A.B. do Vale}23a_{, A. Do Valle Wemans}124a_,

T.K.O. Doan4_{, M. Dobbs}85_{, R. Dobinson}29,∗_{, D. Dobos}42_{, E. Dobson}29_{, M. Dobson}163_{, J. Dodd}34_{, O.B. Dogan}18a,∗_,

C. Doglioni118_{, T. Doherty}53_{, Y. Doi}66,∗_{, J. Dolejsi}126_{, I. Dolenc}74_{, Z. Dolezal}126_{, B.A. Dolgoshein}96,∗_,

T. Dohmae155_{, M. Donadelli}23b_{, M. Donega}120_{, J. Donini}55_{, J. Dopke}29_{, A. Doria}102a_{, A. Dos Anjos}172_{, M. Dosil}11_,

A. Dotti122a,122b_{, M.T. Dova}70_{, J.D. Dowell}17_{, A.D. Doxiadis}105_{, A.T. Doyle}53_{, Z. Drasal}126_{, J. Drees}174_,

N. Dressnandt120_{, H. Drevermann}29_{, C. Driouichi}35_{, M. Dris}9_{, J. Dubbert}99_{, T. Dubbs}137_{, S. Dube}14_,

E. Duchovni171_{, G. Duckeck}98_{, A. Dudarev}29_{, F. Dudziak}64_{, M. D¨uhrssen}29_{, I.P. Duerdoth}82_{, L. Duflot}115_,

M-A. Dufour85, M. Dunford29, H. Duran Yildiz3b, R. Duxfield139, M. Dwuznik37, F. Dydak29, D. Dzahini55, M. D¨uren52, W.L. Ebenstein44, J. Ebke98, S. Eckert48, S. Eckweiler81, K. Edmonds81, C.A. Edwards76, W. Ehrenfeld41, T. Ehrich99, T. Eifert29, G. Eigen13, K. Einsweiler14, E. Eisenhandler75, T. Ekelof166, M. El Kacimi135c, M. Ellert166, S. Elles4, F. Ellinghaus81, K. Ellis75, N. Ellis29, J. Elmsheuser98, M. Elsing29, R. Ely14, D. Emeliyanov129, R. Engelmann148, A. Engl98, B. Epp62, A. Eppig87, J. Erdmann54, A. Ereditato16, D. Eriksson146a_{, J. Ernst}1_{, M. Ernst}24_{, J. Ernwein}136_{, D. Errede}165_{, S. Errede}165_{, E. Ertel}81_{, M. Escalier}115_,

C. Escobar167_{, X. Espinal Curull}11_{, B. Esposito}47_{, F. Etienne}83_{, A.I. Etienvre}136_{, E. Etzion}153_{, D. Evangelakou}54_,

H. Evans61_{, L. Fabbri}19a,19b_{, C. Fabre}29_{, R.M. Fakhrutdinov}128_{, S. Falciano}132a_{, A.C. Falou}115_{, Y. Fang}172_,

M. Fanti89a,89b_{, A. Farbin}7_{, A. Farilla}134a_{, J. Farley}148_{, T. Farooque}158_{, S.M. Farrington}118_{, P. Farthouat}29_,

P. Fassnacht29_{, D. Fassouliotis}8_{, B. Fatholahzadeh}158_{, A. Favareto}89a,89b_{, L. Fayard}115_{, S. Fazio}36a,36b_,

R. Febbraro33_{, P. Federic}144a_{, O.L. Fedin}121_{, I. Fedorko}29_{, W. Fedorko}88_{, M. Fehling-Kaschek}48_{, L. Feligioni}83_,

D. Fellmann5_{, C.U. Felzmann}86_{, C. Feng}32d_{, E.J. Feng}30_{, A.B. Fenyuk}128_{, J. Ferencei}144b_{, J. Ferland}93_,

M.L. Ferrer47, D. Ferrere49, C. Ferretti87, A. Ferretto Parodi50a,50b, M. Fiascaris30, F. Fiedler81, A. Filipˇciˇc74, A. Filippas9, F. Filthaut104, M. Fincke-Keeler169, M.C.N. Fiolhais124a,g, L. Fiorini11, A. Firan39, G. Fischer41, P. Fischer20, M.J. Fisher109, S.M. Fisher129, M. Flechl48, I. Fleck141, J. Fleckner81, P. Fleischmann173, S. Fleischmann174_{, T. Flick}174_{, L.R. Flores Castillo}172_{, M.J. Flowerdew}99_{, F. F¨ohlisch}58a_{, M. Fokitis}9_,

T. Fonseca Martin16_{, D.A. Forbush}138_{, A. Formica}136_{, A. Forti}82_{, D. Fortin}159a_{, J.M. Foster}82_{, D. Fournier}115_,

A. Foussat29_{, A.J. Fowler}44_{, K. Fowler}137_{, H. Fox}71_{, P. Francavilla}122a,122b_{, S. Franchino}119a,119b_{, D. Francis}29_,

T. Frank171_{, M. Franklin}57_{, S. Franz}29_{, M. Fraternali}119a,119b_{, S. Fratina}120_{, S.T. French}27_{, R. Froeschl}29_,

D. Froidevaux29_{, J.A. Frost}27_{, C. Fukunaga}156_{, E. Fullana Torregrosa}29_{, J. Fuster}167_{, C. Gabaldon}29_{, O. Gabizon}171_,

T. Gadfort24_{, S. Gadomski}49_{, G. Gagliardi}50a,50b_{, P. Gagnon}61_{, C. Galea}98_{, E.J. Gallas}118_{, M.V. Gallas}29_,

V. Gallo16_{, B.J. Gallop}129_{, P. Gallus}125_{, E. Galyaev}40_{, K.K. Gan}109_{, Y.S. Gao}143,e_{, V.A. Gapienko}128_,

A. Gaponenko14_{, F. Garberson}175_{, M. Garcia-Sciveres}14_{, C. Garc´ıa}167_{, J.E. Garc´ıa Navarro}49_{, R.W. Gardner}30_,

N. Garelli29_{, H. Garitaonandia}105_{, V. Garonne}29_{, J. Garvey}17_{, C. Gatti}47_{, G. Gaudio}119a_{, O. Gaumer}49_{, B. Gaur}141_,

L. Gauthier136_{, I.L. Gavrilenko}94_{, C. Gay}168_{, G. Gaycken}20_{, J-C. Gayde}29_{, E.N. Gazis}9_{, P. Ge}32d_{, C.N.P. Gee}129_,

D.A.A. Geerts105, Ch. Geich-Gimbel20, K. Gellerstedt146a,146b, C. Gemme50a, A. Gemmell53, M.H. Genest98, S. Gentile132a,132b, M. George54, S. George76, P. Gerlach174, A. Gershon153, C. Geweniger58a, H. Ghazlane135b, P. Ghez4, N. Ghodbane33, B. Giacobbe19a, S. Giagu132a,132b, V. Giakoumopoulou8, V. Giangiobbe122a,122b, F. Gianotti29, B. Gibbard24, A. Gibson158, S.M. Gibson29, L.M. Gilbert118, M. Gilchriese14, V. Gilewsky91,

D. Gillberg28, A.R. Gillman129, D.M. Gingrich2,d, J. Ginzburg153, N. Giokaris8, R. Giordano102a,102b, F.M. Giorgi15, P. Giovannini99_{, P.F. Giraud}136_{, D. Giugni}89a_{, M. Giunta}132a,132b_{, P. Giusti}19a_{, B.K. Gjelsten}117_{, L.K. Gladilin}97_,

C. Glasman80_{, J. Glatzer}48_{, A. Glazov}41_{, K.W. Glitza}174_{, G.L. Glonti}65_{, J. Godfrey}142_{, J. Godlewski}29_,

M. Goebel41_{, T. G¨opfert}43_{, C. Goeringer}81_{, C. G¨ossling}42_{, T. G¨ottfert}99_{, S. Goldfarb}87_{, D. Goldin}39_{, T. Golling}175_,

S.N. Golovnia128_{, A. Gomes}124a,b_{, L.S. Gomez Fajardo}41_{, R. Gon¸calo}76_{, J. Goncalves Pinto Firmino Da Costa}41_,

L. Gonella20_{, A. Gonidec}29_{, S. Gonzalez}172_{, S. Gonz´alez de la Hoz}167_{, M.L. Gonzalez Silva}26_{, S. Gonzalez-Sevilla}49_,

J.J. Goodson148_{, L. Goossens}29_{, P.A. Gorbounov}95_{, H.A. Gordon}24_{, I. Gorelov}103_{, G. Gorfine}174_{, B. Gorini}29_,

E. Gorini72a,72b_{, A. Goriˇsek}74_{, E. Gornicki}38_{, S.A. Gorokhov}128_{, V.N. Goryachev}128_{, B. Gosdzik}41_{, M. Gosselink}105_,

M.I. Gostkin65_{, M. Gouan`ere}4_{, I. Gough Eschrich}163_{, M. Gouighri}135a_{, D. Goujdami}135c_{, M.P. Goulette}49_,

A.G. Goussiou138_{, C. Goy}4_{, I. Grabowska-Bold}163,f_{, V. Grabski}176_{, P. Grafstr¨om}29_{, C. Grah}174_{, K-J. Grahn}147_,

F. Grancagnolo72a_{, S. Grancagnolo}15_{, V. Grassi}148_{, V. Gratchev}121_{, N. Grau}34_{, H.M. Gray}29_{, J.A. Gray}148_,

E. Graziani134a, O.G. Grebenyuk121, D. Greenfield129, T. Greenshaw73, Z.D. Greenwood24,k, I.M. Gregor41, P. Grenier143, E. Griesmayer46, J. Griffiths138, N. Grigalashvili65, A.A. Grillo137, S. Grinstein11, Ph. Gris33, Y.V. Grishkevich97, J.-F. Grivaz115, J. Grognuz29, M. Groh99, E. Gross171, J. Grosse-Knetter54, J. Groth-Jensen79, K. Grybel141, V.J. Guarino5, D. Guest175, C. Guicheney33, A. Guida72a,72b, T. Guillemin4, S. Guindon54,

H. Guler85,l, J. Gunther125, B. Guo158, J. Guo34, A. Gupta30, Y. Gusakov65, V.N. Gushchin128, A. Gutierrez93, P. Gutierrez111_{, N. Guttman}153_{, O. Gutzwiller}172_{, C. Guyot}136_{, C. Gwenlan}118_{, C.B. Gwilliam}73_{, A. Haas}143_,

S. Haas29_{, C. Haber}14_{, R. Hackenburg}24_{, H.K. Hadavand}39_{, D.R. Hadley}17_{, P. Haefner}99_{, F. Hahn}29_{, S. Haider}29_,

Z. Hajduk38_{, H. Hakobyan}176_{, J. Haller}54_{, K. Hamacher}174_{, P. Hamal}113_{, A. Hamilton}49_{, S. Hamilton}161_{, H. Han}32a_,

L. Han32b_{, K. Hanagaki}116_{, M. Hance}120_{, C. Handel}81_{, P. Hanke}58a_{, J.R. Hansen}35_{, J.B. Hansen}35_{, J.D. Hansen}35_,

P.H. Hansen35_{, P. Hansson}143_{, K. Hara}160_{, G.A. Hare}137_{, T. Harenberg}174_{, S. Harkusha}90_{, D. Harper}87_,

R.D. Harrington21_{, O.M. Harris}138_{, K. Harrison}17_{, J. Hartert}48_{, F. Hartjes}105_{, T. Haruyama}66_{, A. Harvey}56_,

S. Hasegawa101_{, Y. Hasegawa}140_{, S. Hassani}136_{, M. Hatch}29_{, D. Hauff}99_{, S. Haug}16_{, M. Hauschild}29_{, R. Hauser}88_,

M. Havranek20_{, B.M. Hawes}118_{, C.M. Hawkes}17_{, R.J. Hawkings}29_{, D. Hawkins}163_{, T. Hayakawa}67_{, D Hayden}76_,

H.S. Hayward73_{, S.J. Haywood}129_{, E. Hazen}21_{, M. He}32d_{, S.J. Head}17_{, V. Hedberg}79_{, L. Heelan}7_{, S. Heim}88_,

B. Heinemann14_{, S. Heisterkamp}35_{, L. Helary}4_{, M. Heldmann}48_{, M. Heller}115_{, S. Hellman}146a,146b_{, C. Helsens}11_,

R.C.W. Henderson71, M. Henke58a, A. Henrichs54, A.M. Henriques Correia29, S. Henrot-Versille115,

F. Henry-Couannier83, C. Hensel54, T. Henß174, C.M. Hernandez7, Y. Hern´andez Jim´enez167, R. Herrberg15, A.D. Hershenhorn152, G. Herten48, R. Hertenberger98, L. Hervas29, N.P. Hessey105, A. Hidvegi146a,

E. Hig´on-Rodriguez167, D. Hill5,∗, J.C. Hill27, N. Hill5, K.H. Hiller41, S. Hillert20, S.J. Hillier17, I. Hinchliffe14, E. Hines120, M. Hirose116, F. Hirsch42, D. Hirschbuehl174, J. Hobbs148, N. Hod153, M.C. Hodgkinson139, P. Hodgson139_{, A. Hoecker}29_{, M.R. Hoeferkamp}103_{, J. Hoffman}39_{, D. Hoffmann}83_{, M. Hohlfeld}81_{, M. Holder}141_,

A. Holmes118_{, S.O. Holmgren}146a_{, T. Holy}127_{, J.L. Holzbauer}88_{, Y. Homma}67_{, T.M. Hong}120_,

L. Hooft van Huysduynen108_{, T. Horazdovsky}127_{, C. Horn}143_{, S. Horner}48_{, K. Horton}118_{, J-Y. Hostachy}55_,

S. Hou151_{, M.A. Houlden}73_{, A. Hoummada}135a_{, J. Howarth}82_{, D.F. Howell}118_{, I. Hristova}41_{, J. Hrivnac}115_,

I. Hruska125_{, T. Hryn’ova}4_{, P.J. Hsu}175_{, S.-C. Hsu}14_{, G.S. Huang}111_{, Z. Hubacek}127_{, F. Hubaut}83_{, F. Huegging}20_,

T.B. Huffman118_{, E.W. Hughes}34_{, G. Hughes}71_{, R.E. Hughes-Jones}82_{, M. Huhtinen}29_{, P. Hurst}57_{, M. Hurwitz}14_,

U. Husemann41_{, N. Huseynov}65,m_{, J. Huston}88_{, J. Huth}57_{, G. Iacobucci}102a_{, G. Iakovidis}9_{, M. Ibbotson}82_,

O. Igonkina105, Y. Ikegami66, M. Ikeno66, Y. Ilchenko39, D. Iliadis154, D. Imbault78, M. Imhaeuser174, M. Imori155, T. Ince20, J. Inigo-Golfin29, P. Ioannou8, M. Iodice134a, G. Ionescu4, A. Irles Quiles167, K. Ishii66, A. Ishikawa67, M. Ishino66, R. Ishmukhametov39, C. Issever118, S. Istin18a, Y. Itoh101, A.V. Ivashin128, W. Iwanski38, H. Iwasaki66, J.M. Izen40_{, V. Izzo}102a_{, B. Jackson}120_{, J.N. Jackson}73_{, P. Jackson}143_{, M.R. Jaekel}29_{, V. Jain}61_{, K. Jakobs}48_,

S. Jakobsen35_{, J. Jakubek}127_{, D.K. Jana}111_{, E. Jankowski}158_{, E. Jansen}77_{, A. Jantsch}99_{, M. Janus}20_{, G. Jarlskog}79_,

L. Jeanty57_{, K. Jelen}37_{, I. Jen-La Plante}30_{, P. Jenni}29_{, A. Jeremie}4_{, P. Jeˇz}35_{, S. J´ez´equel}4_{, M.K. Jha}19a_{, H. Ji}172_,

W. Ji81_{, J. Jia}148_{, Y. Jiang}32b_{, M. Jimenez Belenguer}41_{, G. Jin}32b_{, S. Jin}32a_{, O. Jinnouchi}157_{, M.D. Joergensen}35_,

D. Joffe39_{, L.G. Johansen}13_{, M. Johansen}146a,146b_{, K.E. Johansson}146a_{, P. Johansson}139_{, S. Johnert}41_{, K.A. Johns}6_,

K. Jon-And146a,146b_{, G. Jones}82_{, R.W.L. Jones}71_{, T.W. Jones}77_{, T.J. Jones}73_{, O. Jonsson}29_{, C. Joram}29_,

P.M. Jorge124a,b_{, J. Joseph}14_{, X. Ju}130_{, V. Juranek}125_{, P. Jussel}62_{, V.V. Kabachenko}128_{, S. Kabana}16_{, M. Kaci}167_,

A. Kaczmarska38_{, P. Kadlecik}35_{, M. Kado}115_{, H. Kagan}109_{, M. Kagan}57_{, S. Kaiser}99_{, E. Kajomovitz}152_,

S. Kalinin174_{, L.V. Kalinovskaya}65_{, S. Kama}39_{, N. Kanaya}155_{, M. Kaneda}155_{, T. Kanno}157_{, V.A. Kantserov}96_,

J. Kanzaki66_{, B. Kaplan}175_{, A. Kapliy}30_{, J. Kaplon}29_{, D. Kar}43_{, M. Karagoz}118_{, M. Karnevskiy}41_{, K. Karr}5_,

V. Kartvelishvili71, A.N. Karyukhin128, L. Kashif172, A. Kasmi39, R.D. Kass109, A. Kastanas13, M. Kataoka4, Y. Kataoka155, E. Katsoufis9, J. Katzy41, V. Kaushik6, K. Kawagoe67, T. Kawamoto155, G. Kawamura81, M.S. Kayl105, V.A. Kazanin107, M.Y. Kazarinov65, J.R. Keates82, R. Keeler169, R. Kehoe39, M. Keil54, G.D. Kekelidze65, M. Kelly82, J. Kennedy98, C.J. Kenney143, M. Kenyon53, O. Kepka125, N. Kerschen29, B.P. Kerˇsevan74, S. Kersten174, K. Kessoku155, C. Ketterer48, J. Keung158, M. Khakzad28, F. Khalil-zada10, H. Khandanyan165_{, A. Khanov}112_{, D. Kharchenko}65_{, A. Khodinov}148_{, A.G. Kholodenko}128_{, A. Khomich}58a_,

T.J. Khoo27_{, G. Khoriauli}20_{, A. Khoroshilov}174_{, N. Khovanskiy}65_{, V. Khovanskiy}95_{, E. Khramov}65_{, J. Khubua}51_,

H. Kim7_{, M.S. Kim}2_{, P.C. Kim}143_{, S.H. Kim}160_{, N. Kimura}170_{, O. Kind}15_{, B.T. King}73_{, M. King}67_{, R.S.B. King}118_,

J. Kirk129_{, G.P. Kirsch}118_{, L.E. Kirsch}22_{, A.E. Kiryunin}99_{, D. Kisielewska}37_{, T. Kittelmann}123_{, A.M. Kiver}128_,

H. Kiyamura67_{, E. Kladiva}144b_{, J. Klaiber-Lodewigs}42_{, M. Klein}73_{, U. Klein}73_{, K. Kleinknecht}81_{, M. Klemetti}85_,

A. Klier171_{, A. Klimentov}24_{, R. Klingenberg}42_{, E.B. Klinkby}35_{, T. Klioutchnikova}29_{, P.F. Klok}104_{, S. Klous}105_,

E.-E. Kluge58a_{, T. Kluge}73_{, P. Kluit}105_{, S. Kluth}99_{, E. Kneringer}62_{, J. Knobloch}29_{, E.B.F.G. Knoops}83_{, A. Knue}54_,

B.R. Ko44_{, T. Kobayashi}155_{, M. Kobel}43_{, B. Koblitz}29_{, M. Kocian}143_{, A. Kocnar}113_{, P. Kodys}126_{, K. K¨oneke}29_,

A.C. K¨onig104_{, S. Koenig}81_{, L. K¨opke}81_{, F. Koetsveld}104_{, P. Koevesarki}20_{, T. Koffas}29_{, E. Koffeman}105_{, F. Kohn}54_,

Z. Kohout127_{, T. Kohriki}66_{, T. Koi}143_{, T. Kokott}20_{, G.M. Kolachev}107_{, H. Kolanoski}15_{, V. Kolesnikov}65_,

I. Koletsou89a, J. Koll88, D. Kollar29, M. Kollefrath48, S.D. Kolya82, A.A. Komar94, J.R. Komaragiri142, T. Kondo66, T. Kono41,n, A.I. Kononov48, R. Konoplich108,o, N. Konstantinidis77, A. Kootz174, S. Koperny37, S.V. Kopikov128, K. Korcyl38, K. Kordas154, V. Koreshev128, A. Korn14, A. Korol107, I. Korolkov11,

E.V. Korolkova139, V.A. Korotkov128, O. Kortner99, S. Kortner99, V.V. Kostyukhin20, M.J. Kotam¨aki29, S. Kotov99, V.M. Kotov65, A. Kotwal44, C. Kourkoumelis8, V. Kouskoura154, A. Koutsman105, R. Kowalewski169,

T.Z. Kowalski37_{, W. Kozanecki}136_{, A.S. Kozhin}128_{, V. Kral}127_{, V.A. Kramarenko}97_{, G. Kramberger}74_{, O. Krasel}42_,

M.W. Krasny78_{, A. Krasznahorkay}108_{, J. Kraus}88_{, A. Kreisel}153_{, F. Krejci}127_{, J. Kretzschmar}73_{, N. Krieger}54_,

P. Krieger158_{, K. Kroeninger}54_{, H. Kroha}99_{, J. Kroll}120_{, J. Kroseberg}20_{, J. Krstic}12a_{, U. Kruchonak}65_{, H. Kr¨uger}20_,

Z.V. Krumshteyn65_{, A. Kruth}20_{, T. Kubota}155_{, S. Kuehn}48_{, A. Kugel}58c_{, T. Kuhl}174_{, D. Kuhn}62_{, V. Kukhtin}65_,

Y. Kulchitsky90_{, S. Kuleshov}31b_{, C. Kummer}98_{, M. Kuna}78_{, N. Kundu}118_{, J. Kunkle}120_{, A. Kupco}125_,

H. Kurashige67_{, M. Kurata}160_{, Y.A. Kurochkin}90_{, V. Kus}125_{, W. Kuykendall}138_{, M. Kuze}157_{, P. Kuzhir}91_,

O. Kvasnicka125_{, J. Kvita}29_{, R. Kwee}15_{, A. La Rosa}29_{, L. La Rotonda}36a,36b_{, L. Labarga}80_{, J. Labbe}4_{, S. Lablak}135a_,

C. Lacasta167_{, F. Lacava}132a,132b_{, H. Lacker}15_{, D. Lacour}78_{, V.R. Lacuesta}167_{, E. Ladygin}65_{, R. Lafaye}4_,

B. Laforge78_{, T. Lagouri}80_{, S. Lai}48_{, E. Laisne}55_{, M. Lamanna}29_{, C.L. Lampen}6_{, W. Lampl}6_{, E. Lancon}136_,

U. Landgraf48_{, M.P.J. Landon}75_{, H. Landsman}152_{, J.L. Lane}82_{, C. Lange}41_{, A.J. Lankford}163_{, F. Lanni}24_,

K. Lantzsch29, V.V. Lapin128,∗, S. Laplace78, C. Lapoire20, J.F. Laporte136, T. Lari89a, A.V. Larionov 128, A. Larner118, C. Lasseur29, M. Lassnig29, W. Lau118, P. Laurelli47, A. Lavorato118, W. Lavrijsen14, P. Laycock73, A.B. Lazarev65, A. Lazzaro89a,89b, O. Le Dortz78, E. Le Guirriec83, C. Le Maner158, E. Le Menedeu136,

A. Lebedev64, C. Lebel93, T. LeCompte5, F. Ledroit-Guillon55, H. Lee105, J.S.H. Lee150, S.C. Lee151, L. Lee175, M. Lefebvre169, M. Legendre136, A. Leger49, B.C. LeGeyt120, F. Legger98, C. Leggett14, M. Lehmacher20, G. Lehmann Miotto29_{, X. Lei}6_{, M.A.L. Leite}23b_{, R. Leitner}126_{, D. Lellouch}171_{, J. Lellouch}78_{, M. Leltchouk}34_,

V. Lendermann58a_{, K.J.C. Leney}145b_{, T. Lenz}174_{, G. Lenzen}174_{, B. Lenzi}136_{, K. Leonhardt}43_{, S. Leontsinis}9_,

C. Leroy93_{, J-R. Lessard}169_{, J. Lesser}146a_{, C.G. Lester}27_{, A. Leung Fook Cheong}172_{, J. Levˆeque}4_{, D. Levin}87_,

L.J. Levinson171_{, M.S. Levitski}128_{, M. Lewandowska}21_{, A. Lewis}118_{, G.H. Lewis}108_{, A.M. Leyko}20_{, M. Leyton}15_,

B. Li83_{, H. Li}172_{, S. Li}32b,c_{, X. Li}87_{, Z. Liang}39_{, Z. Liang}118,p_{, B. Liberti}133a_{, P. Lichard}29_{, M. Lichtnecker}98_,

K. Lie165_{, W. Liebig}13_{, R. Lifshitz}152_{, J.N. Lilley}17_{, C. Limbach}20_{, A. Limosani}86_{, M. Limper}63_{, S.C. Lin}151,q_,

F. Linde105_{, J.T. Linnemann}88_{, E. Lipeles}120_{, L. Lipinsky}125_{, A. Lipniacka}13_{, T.M. Liss}165_{, D. Lissauer}24_,

M. Livan119a,119b, S.S.A. Livermore118, A. Lleres55, J. Llorente Merino80, S.L. Lloyd75, E. Lobodzinska41, P. Loch6, W.S. Lockman137, S. Lockwitz175, T. Loddenkoetter20, F.K. Loebinger82, A. Loginov175, C.W. Loh168, T. Lohse15, K. Lohwasser48, M. Lokajicek125, J. Loken118, V.P. Lombardo4, R.E. Long71, L. Lopes124a,b, D. Lopez Mateos34,s, M. Losada162_{, P. Loscutoff}14_{, F. Lo Sterzo}132a,132b_{, M.J. Losty}159a_{, X. Lou}40_{, A. Lounis}115_{, K.F. Loureiro}162_,

J. Love21_{, P.A. Love}71_{, A.J. Lowe}143,e_{, F. Lu}32a_{, L. Lu}39_{, H.J. Lubatti}138_{, C. Luci}132a,132b_{, A. Lucotte}55_,

A. Ludwig43_{, D. Ludwig}41_{, I. Ludwig}48_{, J. Ludwig}48_{, F. Luehring}61_{, G. Luijckx}105_{, D. Lumb}48_{, L. Luminari}132a_,

E. Lund117_{, B. Lund-Jensen}147_{, B. Lundberg}79_{, J. Lundberg}146a,146b_{, J. Lundquist}35_{, M. Lungwitz}81_,

A. Lupi122a,122b_{, G. Lutz}99_{, D. Lynn}24_{, J. Lys}14_{, E. Lytken}79_{, H. Ma}24_{, L.L. Ma}172_{, J.A. Macana Goia}93_,

G. Maccarrone47_{, A. Macchiolo}99_{, B. Maˇcek}74_{, J. Machado Miguens}124a_{, D. Macina}49_{, R. Mackeprang}35_,

R.J. Madaras14_{, W.F. Mader}43_{, R. Maenner}58c_{, T. Maeno}24_{, P. M¨attig}174_{, S. M¨attig}41_,

P.J. Magalhaes Martins124a,g_{, L. Magnoni}29_{, E. Magradze}54_{, Y. Mahalalel}153_{, K. Mahboubi}48_{, G. Mahout}17_,

C. Maiani132a,132b_{, C. Maidantchik}23a_{, A. Maio}124a,b_{, S. Majewski}24_{, Y. Makida}66_{, N. Makovec}115_{, P. Mal}6_,

Pa. Malecki38_{, P. Malecki}38_{, V.P. Maleev}121_{, F. Malek}55_{, U. Mallik}63_{, D. Malon}5_{, S. Maltezos}9_{, V. Malyshev}107_,

S. Malyukov29, R. Mameghani98, J. Mamuzic12b, A. Manabe66, L. Mandelli89a, I. Mandi´c74, R. Mandrysch15, J. Maneira124a, P.S. Mangeard88, I.D. Manjavidze65, A. Mann54, P.M. Manning137, A. Manousakis-Katsikakis8, B. Mansoulie136, A. Manz99, A. Mapelli29, L. Mapelli29, L. March80, J.F. Marchand29, F. Marchese133a,133b, G. Marchiori78, M. Marcisovsky125, A. Marin21,∗, C.P. Marino61, F. Marroquim23a, R. Marshall82, Z. Marshall29, F.K. Martens158, S. Marti-Garcia167, A.J. Martin175, B. Martin29, B. Martin88, F.F. Martin120, J.P. Martin93, Ph. Martin55_{, T.A. Martin}17_{, B. Martin dit Latour}49_{, M. Martinez}11_{, V. Martinez Outschoorn}57_{, A.C. Martyniuk}82_,

M. Marx82_{, F. Marzano}132a_{, A. Marzin}111_{, L. Masetti}81_{, T. Mashimo}155_{, R. Mashinistov}94_{, J. Masik}82_,

A.L. Maslennikov107_{, M. Maß}42_{, I. Massa}19a,19b_{, G. Massaro}105_{, N. Massol}4_{, P. Mastrandrea}132a,132b_,

A. Mastroberardino36a,36b_{, T. Masubuchi}155_{, M. Mathes}20_{, P. Matricon}115_{, H. Matsumoto}155_{, H. Matsunaga}155_,

T. Matsushita67_{, C. Mattravers}118,t_{, J.M. Maugain}29_{, S.J. Maxfield}73_{, D.A. Maximov}107_{, E.N. May}5_{, A. Mayne}139_,

R. Mazini151_{, M. Mazur}20_{, M. Mazzanti}89a_{, E. Mazzoni}122a,122b_{, S.P. Mc Kee}87_{, A. McCarn}165_{, R.L. McCarthy}148_,

T.G. McCarthy28_{, N.A. McCubbin}129_{, K.W. McFarlane}56_{, J.A. Mcfayden}139_{, H. McGlone}53_{, G. Mchedlidze}51_,

R.A. McLaren29_{, T. Mclaughlan}17_{, S.J. McMahon}129_{, R.A. McPherson}169,i_{, A. Meade}84_{, J. Mechnich}105_,

M. Mechtel174_{, M. Medinnis}41_{, R. Meera-Lebbai}111_{, T. Meguro}116_{, R. Mehdiyev}93_{, S. Mehlhase}35_{, A. Mehta}73_,

K. Meier58a_{, J. Meinhardt}48_{, B. Meirose}79_{, C. Melachrinos}30_{, B.R. Mellado Garcia}172_{, L. Mendoza Navas}162_,

Z. Meng151,r, A. Mengarelli19a,19b, S. Menke99, C. Menot29, E. Meoni11, K.M. Mercurio57, P. Mermod118,

L. Merola102a,102b, C. Meroni89a, F.S. Merritt30, A. Messina29, J. Metcalfe103, A.S. Mete64, S. Meuser20, C. Meyer81, J-P. Meyer136, J. Meyer173, J. Meyer54, T.C. Meyer29, W.T. Meyer64, J. Miao32d, S. Michal29, L. Micu25a,

R.P. Middleton129, P. Miele29, S. Migas73, L. Mijovi´c41, G. Mikenberg171, M. Mikestikova125, M. Mikuˇz74, D.W. Miller143, R.J. Miller88, W.J. Mills168, C. Mills57, A. Milov171, D.A. Milstead146a,146b, D. Milstein171, A.A. Minaenko128_{, M. Mi˜nano}167_{, I.A. Minashvili}65_{, A.I. Mincer}108_{, B. Mindur}37_{, M. Mineev}65_{, Y. Ming}130_,

L.M. Mir11_{, G. Mirabelli}132a_{, L. Miralles Verge}11_{, A. Misiejuk}76_{, J. Mitrevski}137_{, G.Y. Mitrofanov}128_,

V.A. Mitsou167_{, S. Mitsui}66_{, P.S. Miyagawa}82_{, K. Miyazaki}67_{, J.U. Mj¨ornmark}79_{, T. Moa}146a,146b_{, P. Mockett}138_,

S. Moed57_{, V. Moeller}27_{, K. M¨onig}41_{, N. M¨oser}20_{, S. Mohapatra}148_{, B. Mohn}13_{, W. Mohr}48_{, S. Mohrdieck-M¨ock}99_,

A.M. Moisseev128,∗_{, R. Moles-Valls}167_{, J. Molina-Perez}29_{, J. Monk}77_{, E. Monnier}83_{, S. Montesano}89a,89b_,

F. Monticelli70_{, S. Monzani}19a,19b_{, R.W. Moore}2_{, G.F. Moorhead}86_{, C. Mora Herrera}49_{, A. Moraes}53_,

A. Morais124a,b_{, N. Morange}136_{, G. Morello}36a,36b_{, D. Moreno}81_{, M. Moreno Ll´acer}167_{, P. Morettini}50a_{, M. Morii}57_,

J. Morin75_{, Y. Morita}66_{, A.K. Morley}29_{, G. Mornacchi}29_{, M-C. Morone}49_{, S.V. Morozov}96_{, J.D. Morris}75_,

H.G. Moser99_{, M. Mosidze}51_{, J. Moss}109_{, R. Mount}143_{, E. Mountricha}9_{, S.V. Mouraviev}94_{, E.J.W. Moyse}84_,

M. Mudrinic12b_{, F. Mueller}58a_{, J. Mueller}123_{, K. Mueller}20_{, T.A. M¨uller}98_{, D. Muenstermann}29_{, A. Muijs}105_,

A. Muir168, Y. Munwes153, K. Murakami66, W.J. Murray129, I. Mussche105, E. Musto102a,102b, A.G. Myagkov128, M. Myska125, J. Nadal11, K. Nagai160, K. Nagano66, Y. Nagasaka60, A.M. Nairz29, Y. Nakahama115,

K. Nakamura155, I. Nakano110, G. Nanava20, A. Napier161, M. Nash77,t, N.R. Nation21, T. Nattermann20, T. Naumann41, G. Navarro162, H.A. Neal87, E. Nebot80, P.Yu. Nechaeva94, A. Negri119a,119b, G. Negri29,

S. Nektarijevic49, A. Nelson64, S. Nelson143, T.K. Nelson143, S. Nemecek125, P. Nemethy108, A.A. Nepomuceno23a, M. Nessi29,u_{, S.Y. Nesterov}121_{, M.S. Neubauer}165_{, A. Neusiedl}81_{, R.M. Neves}108_{, P. Nevski}24_{, P.R. Newman}17_,

R.B. Nickerson118_{, R. Nicolaidou}136_{, L. Nicolas}139_{, B. Nicquevert}29_{, F. Niedercorn}115_{, J. Nielsen}137_{, T. Niinikoski}29_,

A. Nikiforov15_{, V. Nikolaenko}128_{, K. Nikolaev}65_{, I. Nikolic-Audit}78_{, K. Nikolopoulos}24_{, H. Nilsen}48_{, P. Nilsson}7_,

Y. Ninomiya155_{, A. Nisati}132a_{, T. Nishiyama}67_{, R. Nisius}99_{, L. Nodulman}5_{, M. Nomachi}116_{, I. Nomidis}154_,

H. Nomoto155_{, M. Nordberg}29_{, B. Nordkvist}146a,146b_{, P.R. Norton}129_{, J. Novakova}126_{, M. Nozaki}66_{, M. Noˇziˇcka}41_,

L. Nozka113_{, I.M. Nugent}159a_{, A.-E. Nuncio-Quiroz}20_{, G. Nunes Hanninger}20_{, T. Nunnemann}98_{, E. Nurse}77_,

T. Nyman29_{, B.J. O’Brien}45_{, S.W. O’Neale}17,∗_{, D.C. O’Neil}142_{, V. O’Shea}53_{, F.G. Oakham}28,d_{, H. Oberlack}99_,