Search for dilepton resonances in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

arXiv:1108.1582v3 [hep-ex] 8 Dec 2011

Submitted to Physical Review Letters

Search for dilepton resonances in pp collisions at

√

s = 7 TeV with the ATLAS detector

The ATLAS Collaboration

This Letter reports on a search for narrow high-mass resonances decaying into dilepton final states. The data were recorded by the ATLAS experiment in pp collisions at √s = 7 TeV at the Large Hadron Collider (LHC) and correspond to a total integrated luminosity of 1.08 (1.21) fb−1 _in the e+_e−_(µ+_µ−_{) channel. No statistically significant excess above the Standard Model expectation} is observed and upper limits are set at the 95% C.L. on the cross section times branching fraction of Z′_{resonances and Randall-Sundrum gravitons decaying into dileptons as a function of the resonance} mass. A lower mass limit of 1.83 TeV on the Sequential Standard Model Z′_{boson is set. A} Randall-Sundrum graviton with coupling k/MP l=0.1 is excluded at 95% C.L. for masses below 1.63 TeV.

PACS numbers: 13.75.Cs, 12.60.Cn

This Letter describes a search for narrow high-mass resonances decaying into e+_e−_{or µ}+_µ−_{pairs using 7 TeV} pp collision data recorded with the ATLAS detector [1]. Such resonances, which are predicted by several exten-sions of the Standard Model (SM), include new heavy spin-1 neutral gauge bosons such as Z′ _{[2–4] and Z}∗ _[5], techni-mesons [6–8], as well as spin-2 Randall-Sundrum gravitons, G∗ _[9].

The benchmark models considered for the Z′ _{are the} Sequential Standard Model (SSM) [2], with the same cou-plings to fermions as the Z boson, and the E6grand uni-fied symmetry group [4], broken into SU (5) and two ad-ditional U (1) groups, leading to new neutral gauge fields ψ and χ. The particles associated with the additional fields can mix in a linear combination to form the Z′ candidate: Z′_(θ

E6) = Z_ψ′ cos θE6+ Zχ′ sin θE6, where θE6 is the mixing angle between the two gauge bosons. The pattern of spontaneous symmetry breaking and the value of θE6 determine the Z′ couplings to fermions; six well-motivated choices of θE6 [2, 4] lead to the specific Z′ states named Z′

ψ, ZN′ , Zη′, ZI′, ZS′ and Zχ′.

Other models predict additional spatial dimensions as a possible explanation for the gap between the elec-troweak symmetry breaking scale and the gravitational energy scale. The Randall-Sundrum (RS) model [9] pre-dicts excited Kaluza-Klein modes of the graviton, which appear as spin-2 resonances. These modes have a nar-row intrinsic width when k/MP l < 0.1, where k is the spacetime curvature in the extra dimension, and MP l= MP l/

√

8π is the reduced Planck scale.

Previous searches have set direct and indirect con-straints on the mass of the G∗_{and Z}′_{resonances [10, 11].} The Tevatron [12, 13] experiments exclude a Z′

SSM with

a mass lower than 1.071 TeV [13]. Recent measurements from the LHC experiments, based on ≈40 pb−1 _{of data} recorded in 2010, exclude a Z′

SSMwith a mass lower than 1.042 TeV (ATLAS) [14] and 1.140 TeV (CMS) [15]. In-direct constraints from LEP [16–19] extend these limits to 1.787 TeV [11]. Constraints on the mass of the RS

graviton have been set by the CMS [15], CDF [20] and D0 [21] collaborations, excluding RS gravitons with mass below 1.079 TeV for k/MP l= 0.1 [15].

The ATLAS detector consists of inner tracking devices surrounded by a 2 T superconducting solenoid, electro-magnetic and hadronic calorimeters, and a muon spec-trometer with a toroidal magnetic field. Charged par-ticles in the pseudorapidity range |η| < 2.5 [22] are re-constructed with the inner detector, which consists of silicon pixel, silicon strip, and transition radiation detec-tors. The superconducting solenoid is surrounded by a hermetic calorimeter that covers |η| < 4.9. For |η| < 2.5, the electromagnetic calorimeter is finely segmented and plays an important role in electron identification. Out-side the calorimeter, air-core toroids provide the mag-netic field for the muon spectrometer. Three sets of pre-cision drift tubes and cathode strip chambers provide an accurate measurement of the muon track curvature in the region |η| < 2.7. Resistive-plate and thin-gap chambers provide muon triggering capability up to |η| < 2.4.

The data sample used in this analysis, recorded during the first half of 2011, corresponds to a total integrated lu-minosity of 1.08 (1.21) fb−1_{in the e}+_e−_(µ+_µ−_{) channel.} Events are required to pass single electron (muon) trig-gers with a transverse energy ET (transverse momentum pT) threshold above 20 (22) GeV. Collision candidates are selected by requiring a primary vertex with at least three associated charged particle tracks with pT> 0.4 GeV.

In the e+_e− _{channel, two electron candidates are} re-quired with transverse energy ET > 25 GeV and |η| < 2.47; the transition region 1.37 ≤ |η| ≤ 1.52 between the barrel and the endcap calorimeters is excluded. Electron candidates are formed from clusters of cells reconstructed in the electromagnetic calorimeter associated with a charged particle track in the inner detector. Criteria on the transverse shower shape, the longitudinal leakage into the hadronic calorimeter, and the association with an in-ner detector track are applied to the cluster to define a so-called Medium electron [23, 24]. The electron energy

is obtained from the calorimeter measurement and its di-rection from the associated track. A hit in the first active pixel layer is required to suppress background from pho-ton conversions. To further suppress background from QCD jet production, the higher ET electron is required to be isolated by demanding that ΣET(∆R < 0.2) < 7 GeV, where ∆R = p(∆η)2_{+ (∆φ)}2 _{and ΣE}

T(∆R < 0.2) is the sum of the transverse energies around the electron direction. The core of the electron energy deposition is excluded and the sum is corrected for transverse shower leakage and pile-up from additional pp collisions. The two electron candidates are not required to have oppo-site charge to minimize the impact of possible charge mis-identification. For these selection criteria, the total sig-nal acceptance for a Z′ _{→ e}+_e− _(G∗ _{→ e}+_e−_{) of mass} 1.5 TeV is 65% (69%), and is approximately independent of mass above 600 GeV. These numbers include the ac-ceptance of all selection cuts and efficiencies, and reflect the lepton angular distributions due to spin.

In the µ+_µ−_{channel, two muon candidates of opposite} charge are required, each satisfying pT> 25 GeV. Muon tracks are reconstructed independently in both the in-ner detector and muon spectrometer, and their momenta are determined from a combined fit to these two mea-surements. To optimize the momentum resolution, each muon candidate is required to pass quality cuts in the inner detector and to have at least three hits in each of the inner, middle, and outer layers of the muon sys-tem. Muons with hits in both the barrel and the end-cap regions are discarded because of residual misalign-ment between these two parts of the muon spectrometer. The effects of misalignments and intrinsic position reso-lution are included in the simulation. The pTresolution at 1 TeV ranges from 15% (central) to 44% (for |η| > 2). To suppress background from cosmic rays, the muon tracks are required to have a transverse impact parame-ter |d0| < 0.2 mm, a distance along the beam-line to the primary vertex below 1 mm, and the z position of the pri-mary vertex |z(PV)| < 200 mm. To reduce background from QCD jets, each muon is required to be isolated such that ΣpT(∆R < 0.3)/pT(µ) < 0.05, where only tracks with pT > 1 GeV enter the sum. The total signal ac-ceptance is 40% (44%) for a Z′ _{→ µ}+_µ− _(G∗ _{→ µ}+_µ−₎ of mass 1.5 TeV. The lower acceptance compared to the electron channel is due to the stringent requirements on the muon selection criteria to improve pT resolution.

For both channels, the dominant and irreducible back-ground is due to the Z/γ∗ _{(Drell-Yan) process,} charac-terized by the same final state as the signal. Small con-tributions from t¯t and diboson (W W , W Z and ZZ) pro-duction are also present in both channels. Semi-leptonic decays of b and c quarks in the µ+_µ− _{sample and a} mix-ture of photon conversions, semi-leptonic heavy quark decays, and hadrons faking electrons in the e+_e− sam-ple are backgrounds that are referred to below as QCD background. Jets accompanying W bosons (W + jets) may similarly produce lepton candidates.

The expected signal and backgrounds, with the

excep-tion of the QCD component, are evaluated with simu-lated samples and rescaled using the most precise avail-able cross section predictions. The Z′_{, G}∗ _{signal and} Z/γ∗_{processes are generated with Pythia 6.421 [25]} us-ing MRST2007 LO* [26] parton distribution functions (PDFs). Interference between the Z/γ∗_{processes and the} heavy resonances is small and therefore neglected. The diboson processes are generated with Herwig 6.510 [27] using MRST2007 LO* PDFs. The W +jets background is generated with Alpgen [28] using CTEQ6L1 [29] PDFs and the t¯t background with MC@NLO 3.41 [30] using CTEQ66 [31] PDFs. For both, Jimmy 4.31 [32] is used to describe multiple parton interactions and Herwig to de-scribe the remaining underlying event and parton show-ers. Final-state photon radiation is handled with pho-tos_{[33]. The samples are processed through a full} AT-LAS detector simulation [34] based on GEANT4 [35].

The Z/γ∗ _{cross section is calculated at} next-to-next-to-leading order (NNLO) using PHOZPR [36] with MSTW2008 PDFs [37]. The ratio of this cross section to the leading-order cross section is used to determine a mass dependent QCD K-factor which is applied to the results of the leading-order simulations. The same QCD K-factor is applied to the Z′ _{signal. No QCD} K-factor is available for G∗ _{production at 7 TeV [38, 39].} Higher-order weak corrections (beyond the photon ra-diation included in the simulation) are calculated using horace_{[40, 41], yielding a weak K-factor due to virtual} heavy gauge boson loops. The weak K-factor is only ap-plied to the Drell-Yan background. The diboson cross sections are calculated to next-to-leading order (NLO) using mcfm [42] with an uncertainty of 5%. The W +jets cross section is rescaled to the inclusive NNLO calcula-tion of fewz [43], resulting in 30% uncertainty when at least one parton with ET > 20 GeV accompanies the W boson. The t¯t cross section is predicted at approximate-NNLO, with 10% uncertainty [44, 45].

The QCD background in the e+_e− _{sample is} esti-mated with data using “reversed electron identification” and “isolation fit” techniques [14], and a third method that uses fake rates measured from inclusive jet samples. In the “reversed electron identification” technique, data with both electron candidates failing some identification criteria (chosen not to affect kinematic distributions) are used to determine the QCD background distribution ver-sus mee. This method is used for the central estimate and the others which bracket it, to assign a systematic uncertainty. The QCD background in the µ+_µ− _sample is evaluated from data using the muon isolation variable ΣpT(∆R < 0.3)/pT[14]. The QCD and W + jets back-grounds are small (negligible) for the electron (muon) channel. Backgrounds from cosmic rays are negligible.

The observed invariant mass distributions are com-pared to the SM expectation. For this purpose, the Drell-Yan, t¯t, diboson and W + jets backgrounds from Monte Carlo simulation are scaled according to their respective cross sections and added to the QCD background. The simulated backgrounds are then rescaled so that the sum

[GeV] ee m 100 1000 Events -2 10 -1 10 1 10 2 10 3 10 4 10 5 10 6 10 Data 2011 * γ Z/ Diboson t t W+Jets QCD Z’(1000 GeV) Z’(1250 GeV) Z’(1500 GeV) ATLAS -1 L dt = 1.08 fb

∫

= 7 TeV s 80 200 500 2000 [GeV] µ µ m 100 1000 Events -2 10 -1 10 1 10 2 10 3 10 4 10 5 10 6 10 Data 2011 * γ Z/ Diboson t t W+Jets QCD Z’(1000 GeV) Z’(1250 GeV) Z’(1500 GeV) ATLAS = 7 TeV s -1 L dt = 1.21 fb

∫

80 200 500 2000

FIG. 1: Dielectron (top) and dimuon (bottom) invariant mass (mℓℓ) distribution after final selection, compared to the stacked sum of all expected backgrounds, with three example Z′

SSM signals overlaid. The bin width is constant in log mℓℓ.

matches the observed number of data events in the 70 -110 GeV mass interval. The scaling factor is within 1% of unity. The advantage of this approach is that the un-certainty on the luminosity, and any mass independent uncertainties on efficiencies, cancel between the Z′ _(G∗₎ and the Z boson.

Figure 1 presents the invariant mass (mℓℓ) distribu-tion for the dielectron (top) and dimuon (bottom) final states after final selection, while Table I shows the num-ber of data events and the estimated backgrounds in bins of reconstructed mℓℓ. The dilepton invariant mass dis-tributions are well described by the prediction from SM processes. Figure 1 also displays the expected Z′

SSM

sig-nal for three mass hypotheses.

The invariant mass distribution of the data is com-pared to the backgrounds and signal templates with pole masses in the 0.13-2.0 TeV range [14, 46]. A likelihood function is defined as the product of the Poisson prob-abilities over all mass bins in the search region. The Poisson probability in each bin is evaluated for the ob-served number of data events given the background and

TABLE I: Expected and observed number of events in the dielectron (top) and dimuon (bottom) channels. The first bin is used to normalize the total background to the data. The errors quoted include both statistical and systematic un-certainties, except the error on the total background in the normalization region which is given by the square root of the number of observed events. The systematic uncertainties are correlated across bins and are discussed in the text.

me+e−[GeV] 70-110 110-200 200-400 400-800 800-3000 DY 258482 ± 410 5449 ± 180 613 ± 26 53.8 ± 3.1 2.8 ± 0.1 t¯t 218 ± 36 253 ± 10 82 ± 3 5.4 ± 0.3 0.1 ± 0.0 Diboson 368 ± 19 85 ± 5 29 ± 2 3.1 ± 0.5 0.3 ± 0.1 W+jets 150 ± 100 150 ± 26 43 ± 10 4.6 ± 1.8 0.2 ± 0.4 QCD 332 ± 59 191 ± 75 36 ± 29 1.8 ± 1.4 < 0.05 Total 259550 ± 510 6128 ± 200 803 ± 40 68.8 ± 3.9 3.4 ± 0.4 Data 259550 6117 808 65 3 mµ+µ−[GeV] 70-110 110-200 200-400 400-800 800-3000 DY 236319 ± 320 5171 ± 150 483 ± 22 40.3 ± 2.5 2.0 ± 0.3 t¯t 193 ± 21 193 ± 20 63 ± 6 4.2 ± 0.4 0.1 ± 0.0 Diboson 307 ± 16 69 ± 5 25 ± 2 1.7 ± 0.5 < 0.05 W +jets 1 ± 1 1 ± 1 < 0.5 < 0.05 < 0.05 QCD 1 ± 1 < 0.5 < 0.5 < 0.05 < 0.05 Total 236821 ± 487 5434 ± 150 571 ± 23 46.1 ± 2.6 2.1 ± 0.3 Data 236821 5406 557 51 5

signal template expectation. The total signal acceptance as a function of mass is propagated into the expectation. The significance of a signal is summarized by a p-value, the probability of observing an excess at least as signal-like as the one observed in data, in the absence of signal. The outcome of the search is ranked using a likelihood ra-tio, which is scanned as a function of Z′_{cross section and} mZ′ over the full considered mass range. The data are consistent with the SM hypothesis, with p-values of 54% and 24% for the e+_e− _{and µ}+_µ− _{channels respectively.}

Given the absence of a signal, an upper limit on the signal cross section is determined at the 95% confidence level (C.L.) using a Bayesian approach [47] with a flat, positive prior on the signal cross section.

Mass-dependent systematic uncertainties are incor-porated as nuisance parameters which are integrated out [47]. They include normalization to the Z-peak, PDF, QCD and weak K-factors, as well as trigger, re-construction and identification efficiencies. These uncer-tainties are correlated across all bins in the search region and they are correlated between signal and background. Since the total background is normalized to the data in the region of the Z → ℓ+_ℓ− _{mass peak, the residual} sys-tematic uncertainties are small at the Z pole and grow at higher mass. The dominant uncertainties are theoretical. The overall uncertainty due to PDF and αS variations is estimated to be 10% at 1.5 TeV using the MSTW 2008 eigenvector PDF sets and other PDF sets corresponding to variations of αS. The difference with respect to CTEQ is included as an additional 3% uncertainty. The uncer-tainty on the QCD K-factor is 3%, evaluated from vari-ations of the renormalization and factorization scales by factors of two around the nominal values. A systematic uncertainty of 4.5% is attributed to EW corrections [14].

TABLE II: Summary of the dominant systematic uncertain-ties on the expected signal and background yields at mℓ+_ℓ− = 1.5 TeV for the Z′ _(G∗_{) analysis. NA means not applicable.}

Source dielectrons dimuons

signal background signal background

Normalization 5% NA 5% NA

PDFs/αS NA 10% NA 10%

QCD K-factor NA 3% NA 3%

Weak K-factor NA 4.5% NA 4.5%

Trigger/Reconstruction negligible negligible 4.5% 4.5%

Total 5% 11% 7% 12%

The uncertainty on the Z/γ∗_{cross section is 5%, which is} applied as a systematic uncertainty on the normalization. Experimental systematic effects due to resolution and inefficiencies at high mass were studied. In the electron channel, the calorimeter energy resolution is dominated at large ET by a constant term which is 1.2% in the barrel and 1.8% in the endcaps, with negligible uncer-tainty. The uncertainty on the resolution in the muon channel is due to residual misalignments and intrinsic po-sition uncertainties in the muon spectrometer that prop-agate to a change in the observed width of the Z′ _(G∗₎ line-shape. The simulation was adjusted to reproduce the data at high muon momentum. The residual uncer-tainty translates into an event yield unceruncer-tainty of less than 1.5%. The combined uncertainty on the muon trig-ger and reconstruction efficiency is estimated to be 4.5% at 1.5 TeV. This uncertainty is dominated by a conser-vative estimate of the impact of large energy loss from muon bremsstrahlung in the calorimeter on the muon re-construction performance in the muon spectrometer. In the electron channel, a systematic uncertainty of 1.5% at 1.5 TeV is estimated for a possible identification ineffi-ciency caused by the isolation requirement.

The dominant systematic uncertainties are summa-rized in Table II. Uncertainties below 3% are neglected, and no theory uncertainties are applied to the Z′ _{or G}∗ signal in the limit setting procedure described below.

The limit on the number of produced Z′ _(G∗_{) events} is converted into a limit on cross section times branch-ing fraction σB by scalbranch-ing with the observed number of Z boson events and the theoretical value of σB(Z → ll). The expected exclusion limits are determined using simulated pseudo-experiments containing only Standard Model processes, by evaluating the 95% C.L. upper limits for each pseudo-experiment for each fixed value of mZ′ (mG∗). The median of the distribution of limits repre-sents the expected limit. The ensemble of limits is used to find the 68% and 95% envelopes of the expected lim-its as a function of mZ′ (m_G∗). Figure 2 (top) shows the combined dielectron and dimuon 95% C.L. observed and expected exclusion limits on σB(Z′ _{→ ll). It also} shows the theoretical cross section times branching frac-tion for the Z′

SSM and for E6-motivated Z′ models with the lowest and highest σB. Figure 2 (bottom) shows the corresponding limits on the RS graviton. Mass lim-its obtained for the Z′

SSMand G∗(with k/MP l=0.1) are

m [TeV] 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 B [pb] σ -3 10 -2 10 -1 10 1 Expected limit σ 1 ± Expected σ 2 ± Expected Observed limit SSM Z’ χ Z’ ψ Z’ ATLAS ll → Z’ = 7 TeV s -1 L dt = 1.08 fb

∫

ee: -1 L dt = 1.21 fb

∫

: µ µ m [TeV] 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 B [pb] σ -3 10 -2 10 -1 10 1 Expected limit σ 1 ± Expected σ 2 ± Expected Observed limit = 0.1 Pl M k/ = 0.05 Pl M k/ = 0.03 Pl M k/ = 0.01 Pl M k/ ATLAS ll → G* = 7 TeV s -1 L dt = 1.08 fb

∫

ee: -1 L dt = 1.21 fb

∫

: µ µ

FIG. 2: Expected and observed 95% C.L. upper limits on σB as a function of mass for Z′ _{(top) and G}∗_{(bottom) models.} Both results show the combination of the electron and muon channels. The thickness of the Z′

SSM (top) and the G∗ for k/MP l=0.1 (bottom) theory curves illustrate the theoretical uncertainties.

displayed in Table III. The combined mass limits on the E6-motivated models and the G∗ with various couplings are given in Table IV.

TABLE III: Observed (Expected) 95% C.L. mass lower limits in TeV on Z′

SSM resonance and G∗ graviton (with k/MP l=0.1).

Model e+_e− _µ+_µ− _ℓ+_ℓ− Z′

SSM 1.70 (1.70) 1.61 (1.61) 1.83 (1.83) G∗ _{1.51 (1.50) 1.45 (1.44) 1.63 (1.63)}

In conclusion, the ATLAS detector has been used to search for narrow, heavy resonances in the dilepton in-variant mass spectrum above the Z boson pole. Proton-proton collision data with 1.08 (1.21) fb−1 _{in the e}+_e− (µ+_µ−_{) channel have been used. The observed invariant} mass spectra are consistent with the SM expectations.

TABLE IV: 95% C.L. lower limits on the masses of E6 -motivated Z′ _{bosons and RS gravitons G}∗_{for various values} of the coupling k/MP l. Both lepton channels are combined.

E6Z′Models RS Graviton Model/Coupling Z′

ψ Z′N Zη′ ZI′ ZS′ Zχ′ 0.01 0.03 0.05 0.1 Mass limit [TeV] 1.49 1.52 1.54 1.56 1.60 1.64 0.71 1.03 1.33 1.63

Limits are set on the cross section times branching frac-tion σB. The resulting mass limits are 1.83 TeV for the Sequential Standard Model Z′ _{boson, 1.49−1.64 TeV for} various E6-motivated Z′bosons, and 0.71 TeV−1.63 TeV for a Randall-Sundrum graviton with couplings (k/MP l) in the range 0.01−0.1. The Z′ _{boson limits are the most} stringent to date, including indirect limits set by LEP2.

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; 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.

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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_{, J. Albert}169_, S. Albrand55_{, M. Aleksa}29_{, I.N. Aleksandrov}65_{, F. Alessandria}89a_{, C. Alexa}25a_{, G. Alexander}153_{, G. Alexandre}49_, T. Alexopoulos9_{, M. Alhroob}20_{, M. Aliev}15_{, G. Alimonti}89a_{, J. Alison}120_{, M. Aliyev}10_{, P.P. Allport}73_,

S.E. Allwood-Spiers53_{, J. Almond}82_{, A. Aloisio}102a,102b_{, R. Alon}171_{, A. Alonso}79_{, M.G. Alviggi}102a,102b_{, K. Amako}66_, P. Amaral29_{, C. Amelung}22_{, V.V. Ammosov}128_{, A. Amorim}124a,b_{, G. Amor´os}167_{, N. Amram}153_{, C. Anastopoulos}29_, L.S. Ancu16_{, N. Andari}115_{, T. Andeen}34_{, C.F. Anders}20_{, G. Anders}58a_{, K.J. Anderson}30_{, A. Andreazza}89a,89b_, V. Andrei58a_{, M-L. Andrieux}55_{, X.S. Anduaga}70_{, A. Angerami}34_{, F. Anghinolfi}29_{, N. Anjos}124a_{, A. Annovi}47_, A. Antonaki8_{, M. Antonelli}47_{, A. Antonov}96_{, J. Antos}144b_{, F. Anulli}132a_{, S. Aoun}83_{, L. Aperio Bella}4_{, R. Apolle}118,c_, G. Arabidze88_{, I. Aracena}143_{, Y. Arai}66_{, A.T.H. Arce}44_{, J.P. Archambault}28_{, S. Arfaoui}29,d_{, J-F. Arguin}14_,

E. Arik18a,∗_{, M. Arik}18a_{, A.J. Armbruster}87_{, O. Arnaez}81_{, C. Arnault}115_{, A. Artamonov}95_{, G. Artoni}132a,132b_, D. Arutinov20, S. Asai155, R. Asfandiyarov172, S. Ask27, B. ˚Asman146a,146b, L. Asquith5, K. Assamagan24, A. Astbury169_{, A. Astvatsatourov}52_{, G. Atoian}175_{, B. Aubert}4_{, E. Auge}115_{, K. Augsten}127_{, M. Aurousseau}145a_, N. Austin73_{, G. Avolio}163_{, R. Avramidou}9_{, D. Axen}168_{, C. Ay}54_{, G. Azuelos}93,e_{, Y. Azuma}155_{, M.A. Baak}29_, G. Baccaglioni89a_{, C. Bacci}134a,134b_{, A.M. Bach}14_{, H. Bachacou}136_{, K. Bachas}29_{, G. Bachy}29_{, M. Backes}49_, M. Backhaus20_{, E. Badescu}25a_{, P. Bagnaia}132a,132b_{, S. Bahinipati}2_{, Y. Bai}32a_{, D.C. Bailey}158_{, T. Bain}158_,

J.T. Baines129_{, O.K. Baker}175_{, M.D. Baker}24_{, S. Baker}77_{, E. Banas}38_{, P. Banerjee}93_{, Sw. Banerjee}172_{, D. Banfi}29_, A. Bangert137_{, V. Bansal}169_{, H.S. Bansil}17_{, L. Barak}171_{, S.P. Baranov}94_{, A. Barashkou}65_{, A. Barbaro Galtieri}14_, T. Barber27_{, E.L. Barberio}86_{, D. Barberis}50a,50b_{, M. Barbero}20_{, D.Y. Bardin}65_{, T. Barillari}99_{, M. Barisonzi}174_, T. Barklow143_{, N. Barlow}27_{, B.M. Barnett}129_{, R.M. Barnett}14_{, A. Baroncelli}134a_{, G. Barone}49_{, A.J. Barr}118_, F. Barreiro80_{, J. Barreiro Guimar˜aes da Costa}57_{, P. Barrillon}115_{, R. Bartoldus}143_{, A.E. Barton}71_{, D. Bartsch}20_, V. Bartsch149_{, R.L. Bates}53_{, L. Batkova}144a_{, J.R. Batley}27_{, A. Battaglia}16_{, M. Battistin}29_{, G. Battistoni}89a_, F. Bauer136_{, H.S. Bawa}143,f_{, B. Beare}158_{, T. Beau}78_{, P.H. Beauchemin}118_{, R. Beccherle}50a_{, P. Bechtle}41_,

H.P. Beck16_{, M. Beckingham}48_{, K.H. Becks}174_{, A.J. Beddall}18c_{, A. Beddall}18c_{, S. Bedikian}175_{, V.A. Bednyakov}65_, C.P. Bee83_{, M. Begel}24_{, S. Behar Harpaz}152_{, P.K. Behera}63_{, M. Beimforde}99_{, C. Belanger-Champagne}85_{, P.J. Bell}49_, W.H. Bell49_{, G. Bella}153_{, L. Bellagamba}19a_{, F. Bellina}29_{, M. Bellomo}29_{, A. Belloni}57_{, O. Beloborodova}107_,

K. Belotskiy96_{, O. Beltramello}29_{, S. Ben Ami}152_{, O. Benary}153_{, D. Benchekroun}135a_{, C. Benchouk}83_{, M. Bendel}81_, N. Benekos165_{, Y. Benhammou}153_{, D.P. Benjamin}44_{, M. Benoit}115_{, J.R. Bensinger}22_{, K. Benslama}130_,

S. Bentvelsen105_{, D. Berge}29_{, E. Bergeaas Kuutmann}41_{, N. Berger}4_{, F. Berghaus}169_{, E. Berglund}49_{, J. Beringer}14_, K. Bernardet83_{, P. Bernat}77_{, R. Bernhard}48_{, C. Bernius}24_{, T. Berry}76_{, A. Bertin}19a,19b_{, F. Bertinelli}29_,

F. Bertolucci122a,122b_{, M.I. Besana}89a,89b_{, N. Besson}136_{, S. Bethke}99_{, W. Bhimji}45_{, R.M. Bianchi}29_{, M. Bianco}72a,72b_, O. Biebel98_{, S.P. Bieniek}77_{, K. Bierwagen}54_{, J. Biesiada}14_{, M. Biglietti}134a,134b_{, H. Bilokon}47_{, M. Bindi}19a,19b_, S. Binet115, A. Bingul18c, C. Bini132a,132b, C. Biscarat177, U. Bitenc48, K.M. Black21, R.E. Blair5,

J.-B. Blanchard115_{, G. Blanchot}29_{, T. Blazek}144a_{, C. Blocker}22_{, J. Blocki}38_{, A. Blondel}49_{, W. Blum}81_, U. Blumenschein54_{, G.J. Bobbink}105_{, V.B. Bobrovnikov}107_{, S.S. Bocchetta}79_{, A. Bocci}44_{, C.R. Boddy}118_, M. Boehler41_{, J. Boek}174_{, N. Boelaert}35_{, S. B¨oser}77_{, J.A. Bogaerts}29_{, A. Bogdanchikov}107_{, A. Bogouch}90,∗_, C. Bohm146a_{, V. Boisvert}76_{, T. Bold}163,g_{, V. Boldea}25a_{, N.M. Bolnet}136_{, M. Bona}75_{, V.G. Bondarenko}96_, M. Bondioli163_{, 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}87_{, 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. Bourdarios}115_{, N. Bousson}83_, A. Boveia30_{, J. Boyd}29_{, I.R. Boyko}65_{, N.I. Bozhko}128_{, I. Bozovic-Jelisavcic}12b_{, J. Bracinik}17_{, A. Braem}29_, P. Branchini134a_{, G.W. Brandenburg}57_{, A. Brandt}7_{, G. Brandt}15_{, O. Brandt}54_{, U. Bratzler}156_{, B. Brau}84_,

J.E. Brau114_{, H.M. Braun}174_{, B. Brelier}158_{, J. Bremer}29_{, R. Brenner}166_{, S. Bressler}152_{, D. Breton}115_{, D. Britton}53_, F.M. Brochu27, I. Brock20, R. Brock88, T.J. Brodbeck71, E. Brodet153, F. Broggi89a, C. Bromberg88,

G. Brooijmans34_{, W.K. Brooks}31b_{, G. Brown}82_{, H. Brown}7_{, P.A. Bruckman de Renstrom}38_{, D. Bruncko}144b_, R. Bruneliere48_{, S. Brunet}61_{, A. Bruni}19a_{, G. Bruni}19a_{, M. Bruschi}19a_{, T. Buanes}13_{, F. Bucci}49_{, J. Buchanan}118_, N.J. Buchanan2_{, P. Buchholz}141_{, R.M. Buckingham}118_{, A.G. Buckley}45_{, S.I. Buda}25a_{, I.A. Budagov}65_{, B. Budick}108_, V. B¨uscher81_{, L. Bugge}117_{, D. Buira-Clark}118_{, O. Bulekov}96_{, M. Bunse}42_{, T. Buran}117_{, H. Burckhart}29_{, S. Burdin}73_, T. Burgess13_{, S. Burke}129_{, E. Busato}33_{, P. Bussey}53_{, C.P. Buszello}166_{, F. Butin}29_{, B. Butler}143_{, J.M. Butler}21_, C.M. Buttar53, J.M. Butterworth77, W. Buttinger27, T. Byatt77, S. Cabrera Urb´an167, D. Caforio19a,19b, O. Cakir3a, P. Calafiura14_{, G. Calderini}78_{, P. Calfayan}98_{, R. Calkins}106_{, L.P. Caloba}23a_{, R. Caloi}132a,132b_{, D. Calvet}33_,

S. Calvet33_{, R. Camacho Toro}33_{, P. Camarri}133a,133b_{, M. Cambiaghi}119a,119b_{, D. Cameron}117_{, S. Campana}29_, M. Campanelli77_{, V. Canale}102a,102b_{, F. Canelli}30,h_{, A. Canepa}159a_{, J. Cantero}80_{, L. Capasso}102a,102b_,

M.D.M. Capeans Garrido29_{, I. Caprini}25a_{, M. Caprini}25a_{, D. Capriotti}99_{, M. Capua}36a,36b_{, R. Caputo}148_, R. Cardarelli133a_{, T. Carli}29_{, G. Carlino}102a_{, L. Carminati}89a,89b_{, B. Caron}159a_{, S. Caron}48_,

G.D. Carrillo Montoya172_{, A.A. Carter}75_{, J.R. Carter}27_{, J. Carvalho}124a,i_{, D. Casadei}108_{, M.P. Casado}11_, M. Cascella122a,122b_{, C. Caso}50a,50b,∗_{, A.M. Castaneda Hernandez}172_{, E. Castaneda-Miranda}172_,

V. Castillo Gimenez167_{, N.F. Castro}124a_{, G. Cataldi}72a_{, F. Cataneo}29_{, A. Catinaccio}29_{, J.R. Catmore}71_{, A. Cattai}29_, G. Cattani133a,133b_{, S. Caughron}88_{, D. Cauz}164a,164c_{, P. Cavalleri}78_{, D. Cavalli}89a_{, M. Cavalli-Sforza}11_,

V. Cavasinni122a,122b_{, F. Ceradini}134a,134b_{, A.S. Cerqueira}23a_{, A. Cerri}29_{, L. Cerrito}75_{, F. Cerutti}47_{, S.A. Cetin}18b_, F. Cevenini102a,102b_{, A. Chafaq}135a_{, D. Chakraborty}106_{, K. Chan}2_{, B. Chapleau}85_{, J.D. Chapman}27_,

J.W. Chapman87_{, E. Chareyre}78_{, D.G. Charlton}17_{, V. Chavda}82_{, C.A. Chavez Barajas}29_{, S. Cheatham}85_, S. Chekanov5_{, S.V. Chekulaev}159a_{, G.A. Chelkov}65_{, M.A. Chelstowska}104_{, C. Chen}64_{, H. Chen}24_{, S. Chen}32c_, T. Chen32c_{, X. Chen}172_{, S. Cheng}32a_{, A. Cheplakov}65_{, V.F. Chepurnov}65_{, R. Cherkaoui El Moursli}135e_,

V. Chernyatin24_{, E. Cheu}6_{, S.L. Cheung}158_{, L. Chevalier}136_{, G. Chiefari}102a,102b_{, L. Chikovani}51_{, J.T. Childers}58a_, A. Chilingarov71_{, G. Chiodini}72a_{, M.V. Chizhov}65_{, G. Choudalakis}30_{, S. Chouridou}137_{, I.A. Christidi}77_,

A. Christov48_{, D. Chromek-Burckhart}29_{, M.L. Chu}151_{, J. Chudoba}125_{, G. Ciapetti}132a,132b_{, K. Ciba}37_{, A.K. Ciftci}3a_, R. Ciftci3a, D. Cinca33, V. Cindro74, M.D. Ciobotaru163, C. Ciocca19a,19b, A. Ciocio14, M. Cirilli87,

M. Ciubancan25a_{, A. Clark}49_{, P.J. Clark}45_{, W. Cleland}123_{, J.C. Clemens}83_{, B. Clement}55_{, C. Clement}146a,146b_, R.W. Clifft129_{, Y. Coadou}83_{, M. Cobal}164a,164c_{, A. Coccaro}50a,50b_{, J. Cochran}64_{, P. Coe}118_{, J.G. Cogan}143_, J. Coggeshall165_{, E. Cogneras}177_{, C.D. Cojocaru}28_{, J. Colas}4_{, A.P. Colijn}105_{, C. Collard}115_{, N.J. Collins}17_,

C. Collins-Tooth53_{, J. Collot}55_{, G. Colon}84_{, P. Conde Mui˜no}124a_{, E. Coniavitis}118_{, M.C. Conidi}11_{, M. Consonni}104_, V. Consorti48_{, S. Constantinescu}25a_{, C. Conta}119a,119b_{, F. Conventi}102a,j_{, J. Cook}29_{, M. Cooke}14_{, B.D. Cooper}77_, A.M. Cooper-Sarkar118_{, N.J. Cooper-Smith}76_{, K. Copic}34_{, T. Cornelissen}50a,50b_{, M. Corradi}19a_{, F. Corriveau}85,k_, A. Cortes-Gonzalez165_{, G. Cortiana}99_{, G. Costa}89a_{, M.J. Costa}167_{, D. Costanzo}139_{, T. Costin}30_{, D. Cˆot´e}29_, L. Courneyea169_{, G. Cowan}76_{, C. Cowden}27_{, B.E. Cox}82_{, K. Cranmer}108_{, F. Crescioli}122a,122b_{, M. Cristinziani}20_, G. Crosetti36a,36b_{, R. Crupi}72a,72b_{, S. Cr´ep´e-Renaudin}55_{, C.-M. Cuciuc}25a_{, C. Cuenca Almenar}175_,

T. Cuhadar Donszelmann139_{, M. Curatolo}47_{, C.J. Curtis}17_{, P. Cwetanski}61_{, H. Czirr}141_{, Z. Czyczula}117_,

S. D’Auria53, M. D’Onofrio73, A. D’Orazio132a,132b, P.V.M. Da Silva23a, C. Da Via82, W. Dabrowski37, T. Dai87, C. Dallapiccola84_{, M. Dam}35_{, M. Dameri}50a,50b_{, D.S. Damiani}137_{, H.O. Danielsson}29_{, D. Dannheim}99_{, V. Dao}49_, G. Darbo50a_{, G.L. Darlea}25b_{, C. Daum}105_{, J.P. Dauvergne}29_{, W. Davey}86_{, T. Davidek}126_{, N. Davidson}86_, R. Davidson71_{, E. Davies}118,c_{, M. Davies}93_{, A.R. Davison}77_{, Y. Davygora}58a_{, 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_{, D. De Pedis}132a_{, A. De Salvo}132a_{, U. De Sanctis}164a,164c_, A. De Santo149_{, J.B. De Vivie De Regie}115_{, S. Dean}77_{, R. Debbe}24_{, D.V. Dedovich}65_{, J. Degenhardt}120_, M. Dehchar118_{, C. Del Papa}164a,164c_{, J. Del Peso}80_{, T. Del Prete}122a,122b_{, M. Deliyergiyev}74_{, A. Dell’Acqua}29_, L. Dell’Asta89a,89b_{, M. Della Pietra}102a,j_{, D. della Volpe}102a,102b_{, M. Delmastro}29_{, P. Delpierre}83_{, N. Delruelle}29_, P.A. Delsart55_{, C. Deluca}148_{, S. Demers}175_{, M. Demichev}65_{, B. Demirkoz}11,l_{, J. Deng}163_{, S.P. Denisov}128_, D. Derendarz38, J.E. Derkaoui135d, F. Derue78, P. Dervan73, K. Desch20, E. Devetak148, P.O. Deviveiros158, A. Dewhurst129_{, B. DeWilde}148_{, S. Dhaliwal}158_{, R. Dhullipudi}24,m_{, A. Di Ciaccio}133a,133b_{, L. Di Ciaccio}4_, A. Di Girolamo29_{, B. Di Girolamo}29_{, S. Di Luise}134a,134b_{, A. Di Mattia}88_{, B. Di Micco}29_{, R. Di Nardo}133a,133b_, A. Di Simone133a,133b_{, R. Di Sipio}19a,19b_{, M.A. Diaz}31a_{, F. Diblen}18c_{, E.B. Diehl}87_{, J. Dietrich}41_{, T.A. Dietzsch}58a_, S. Diglio115_{, K. Dindar Yagci}39_{, J. Dingfelder}20_{, C. Dionisi}132a,132b_{, P. Dita}25a_{, S. Dita}25a_{, F. Dittus}29_{, F. Djama}83_, T. Djobava51_{, M.A.B. do Vale}23a_{, A. Do Valle Wemans}124a_{, T.K.O. Doan}4_{, M. Dobbs}85_{, R. Dobinson}29,∗_,

D. Dobos29_{, E. Dobson}29_{, M. Dobson}163_{, J. Dodd}34_{, C. Doglioni}118_{, T. Doherty}53_{, Y. Doi}66,∗_{, J. Dolejsi}126_, I. Dolenc74_{, Z. Dolezal}126_{, B.A. Dolgoshein}96,∗_{, T. Dohmae}155_{, M. Donadelli}23d_{, M. Donega}120_{, J. Donini}55_, J. Dopke29_{, A. Doria}102a_{, A. Dos Anjos}172_{, M. Dosil}11_{, A. Dotti}122a,122b_{, M.T. Dova}70_{, J.D. Dowell}17_,

A.D. Doxiadis105_{, A.T. Doyle}53_{, Z. Drasal}126_{, J. Drees}174_{, N. Dressnandt}120_{, H. Drevermann}29_{, C. Driouichi}35_, M. Dris9_{, J. Dubbert}99_{, T. Dubbs}137_{, S. Dube}14_{, E. Duchovni}171_{, G. Duckeck}98_{, A. Dudarev}29_{, F. Dudziak}64_, M. D¨uhrssen29, I.P. Duerdoth82, L. Duflot115, M-A. Dufour85, M. Dunford29, H. Duran Yildiz3b, R. Duxfield139, M. Dwuznik37_{, F. Dydak}29_{, M. D¨uren}52_{, W.L. Ebenstein}44_{, J. Ebke}98_{, S. Eckert}48_{, S. Eckweiler}81_{, K. Edmonds}81_, C.A. Edwards76_{, N.C. Edwards}53_{, W. Ehrenfeld}41_{, T. Ehrich}99_{, T. Eifert}29_{, G. Eigen}13_{, K. Einsweiler}14_,

E. Eisenhandler75_{, T. Ekelof}166_{, M. El Kacimi}135c_{, M. Ellert}166_{, S. Elles}4_{, F. Ellinghaus}81_{, K. Ellis}75_{, N. Ellis}29_, J. Elmsheuser98_{, M. Elsing}29_{, D. Emeliyanov}129_{, R. Engelmann}148_{, A. Engl}98_{, B. Epp}62_{, A. Eppig}87_{, J. Erdmann}54_, A. Ereditato16_{, D. Eriksson}146a_{, J. Ernst}1_{, M. Ernst}24_{, J. Ernwein}136_{, D. Errede}165_{, S. Errede}165_{, E. Ertel}81_, M. Escalier115_{, C. Escobar}123_{, X. Espinal Curull}11_{, B. Esposito}47_{, F. Etienne}83_{, A.I. Etienvre}136_{, E. Etzion}153_, D. Evangelakou54_{, H. Evans}61_{, L. Fabbri}19a,19b_{, C. Fabre}29_{, R.M. Fakhrutdinov}128_{, S. Falciano}132a_{, 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_,

C.U. Felzmann86_{, C. Feng}32d_{, E.J. Feng}30_{, A.B. Fenyuk}128_{, J. Ferencei}144b_{, J. Ferland}93_{, W. Fernando}109_, S. Ferrag53_{, J. Ferrando}53_{, V. Ferrara}41_{, A. Ferrari}166_{, P. Ferrari}105_{, R. Ferrari}119a_{, A. Ferrer}167_{, M.L. Ferrer}47_, D. Ferrere49_{, C. Ferretti}87_{, A. Ferretto Parodi}50a,50b_{, M. Fiascaris}30_{, F. Fiedler}81_{, A. Filipˇciˇc}74_{, A. Filippas}9_, F. Filthaut104_{, M. Fincke-Keeler}169_{, M.C.N. Fiolhais}124a,i_{, L. Fiorini}167_{, A. Firan}39_{, G. Fischer}41_{, P. Fischer}20_, M.J. Fisher109_{, S.M. Fisher}129_{, M. Flechl}48_{, I. Fleck}141_{, J. Fleckner}81_{, P. Fleischmann}173_{, S. Fleischmann}174_, T. Flick174_{, L.R. Flores Castillo}172_{, M.J. Flowerdew}99_{, M. Fokitis}9_{, T. Fonseca Martin}16_{, D.A. Forbush}138_, A. Formica136_{, A. Forti}82_{, D. Fortin}159a_{, J.M. Foster}82_{, D. Fournier}115_{, A. Foussat}29_{, A.J. Fowler}44_{, K. Fowler}137_, H. Fox71_{, P. Francavilla}122a,122b_{, S. Franchino}119a,119b_{, D. Francis}29_{, T. Frank}171_{, M. Franklin}57_{, S. Franz}29_, M. Fraternali119a,119b_{, S. Fratina}120_{, S.T. French}27_{, F. Friedrich}43_{, R. Froeschl}29_{, D. Froidevaux}29_{, J.A. Frost}27_, C. Fukunaga156_{, E. Fullana Torregrosa}29_{, J. Fuster}167_{, C. Gabaldon}29_{, O. Gabizon}171_{, T. Gadfort}24_{, S. Gadomski}49_, G. Gagliardi50a,50b_{, P. Gagnon}61_{, C. Galea}98_{, E.J. Gallas}118_{, M.V. Gallas}29_{, V. Gallo}16_{, B.J. Gallop}129_{, P. Gallus}125_, E. Galyaev40_{, K.K. Gan}109_{, Y.S. Gao}143,f_{, V.A. Gapienko}128_{, A. Gaponenko}14_{, F. Garberson}175_,

M. Garcia-Sciveres14_{, C. Garc´ıa}167_{, J.E. Garc´ıa Navarro}49_{, R.W. Gardner}30_{, N. Garelli}29_{, H. Garitaonandia}105_, V. Garonne29_{, J. Garvey}17_{, C. Gatti}47_{, G. Gaudio}119a_{, O. Gaumer}49_{, B. Gaur}141_{, L. Gauthier}136_{, I.L. Gavrilenko}94_, C. Gay168, G. Gaycken20, J-C. Gayde29, E.N. Gazis9, P. Ge32d, C.N.P. Gee129, D.A.A. Geerts105,

Ch. Geich-Gimbel20_{, K. Gellerstedt}146a,146b_{, C. Gemme}50a_{, A. Gemmell}53_{, M.H. Genest}98_{, S. Gentile}132a,132b_, M. George54_{, S. George}76_{, P. Gerlach}174_{, A. Gershon}153_{, C. Geweniger}58a_{, H. Ghazlane}135b_{, P. Ghez}4_,

N. Ghodbane33_{, B. Giacobbe}19a_{, S. Giagu}132a,132b_{, V. Giakoumopoulou}8_{, V. Giangiobbe}122a,122b_{, F. Gianotti}29_, B. Gibbard24_{, A. Gibson}158_{, S.M. Gibson}29_{, L.M. Gilbert}118_{, M. Gilchriese}14_{, V. Gilewsky}91_{, D. Gillberg}28_, A.R. Gillman129_{, D.M. Gingrich}2,e_{, J. Ginzburg}153_{, N. Giokaris}8_{, M.P. Giordani}164c_{, R. Giordano}102a,102b_, F.M. Giorgi15_{, P. Giovannini}99_{, P.F. Giraud}136_{, D. Giugni}89a_{, M. Giunta}93_{, P. Giusti}19a_{, B.K. Gjelsten}117_, L.K. Gladilin97_{, C. Glasman}80_{, J. Glatzer}48_{, A. Glazov}41_{, K.W. Glitza}174_{, G.L. Glonti}65_{, J. Godfrey}142_, J. Godlewski29_{, M. Goebel}41_{, T. G¨opfert}43_{, C. Goeringer}81_{, C. G¨ossling}42_{, T. G¨ottfert}99_{, S. Goldfarb}87_, T. Golling175_{, S.N. Golovnia}128_{, A. Gomes}124a,b_{, L.S. Gomez Fajardo}41_{, R. Gon¸calo}76_,

J. Goncalves Pinto Firmino Da Costa41_{, L. Gonella}20_{, A. Gonidec}29_{, S. Gonzalez}172_{, S. Gonz´alez de la Hoz}167_, M.L. Gonzalez Silva26, S. Gonzalez-Sevilla49, J.J. Goodson148, L. Goossens29, P.A. Gorbounov95, H.A. Gordon24, I. Gorelov103_{, G. Gorfine}174_{, B. Gorini}29_{, E. Gorini}72a,72b_{, A. Goriˇsek}74_{, E. Gornicki}38_{, S.A. Gorokhov}128_,

V.N. Goryachev128_{, B. Gosdzik}41_{, M. Gosselink}105_{, M.I. Gostkin}65_{, I. Gough Eschrich}163_{, M. Gouighri}135a_, D. Goujdami135c_{, M.P. Goulette}49_{, A.G. Goussiou}138_{, C. Goy}4_{, I. Grabowska-Bold}163,g_{, V. Grabski}176_,

P. Grafstr¨om29_{, C. Grah}174_{, K-J. Grahn}41_{, F. Grancagnolo}72a_{, S. Grancagnolo}15_{, V. Grassi}148_{, V. Gratchev}121_, N. Grau34_{, H.M. Gray}29_{, J.A. Gray}148_{, E. Graziani}134a_{, O.G. Grebenyuk}121_{, D. Greenfield}129_{, T. Greenshaw}73_, Z.D. Greenwood24,m_{, K. Gregersen}35_{, I.M. Gregor}41_{, P. Grenier}143_{, J. Griffiths}138_{, N. Grigalashvili}65_{, A.A. Grillo}137_, S. Grinstein11_{, Y.V. Grishkevich}97_{, J.-F. Grivaz}115_{, J. Grognuz}29_{, M. Groh}99_{, E. Gross}171_{, J. Grosse-Knetter}54_, J. Groth-Jensen171_{, K. Grybel}141_{, V.J. Guarino}5_{, D. Guest}175_{, C. Guicheney}33_{, A. Guida}72a,72b_{, T. Guillemin}4_, S. Guindon54_{, H. Guler}85,n_{, J. Gunther}125_{, B. Guo}158_{, J. Guo}34_{, A. Gupta}30_{, Y. Gusakov}65_{, V.N. Gushchin}128_, A. Gutierrez93_{, P. Gutierrez}111_{, N. Guttman}153_{, O. Gutzwiller}172_{, C. Guyot}136_{, C. Gwenlan}118_{, C.B. Gwilliam}73_, A. Haas143, S. Haas29, C. Haber14, R. Hackenburg24, H.K. Hadavand39, D.R. Hadley17, P. Haefner99, F. Hahn29, S. Haider29_{, Z. Hajduk}38_{, H. Hakobyan}176_{, J. Haller}54_{, K. Hamacher}174_{, P. Hamal}113_{, A. Hamilton}49_,

S. Hamilton161_{, H. Han}32a_{, L. Han}32b_{, K. Hanagaki}116_{, M. Hance}120_{, C. Handel}81_{, P. Hanke}58a_{, J.R. Hansen}35_, J.B. Hansen35_{, J.D. Hansen}35_{, P.H. Hansen}35_{, P. Hansson}143_{, K. Hara}160_{, G.A. Hare}137_{, T. Harenberg}174_, S. Harkusha90_{, D. Harper}87_{, R.D. Harrington}21_{, O.M. Harris}138_{, K. Harrison}17_{, J. Hartert}48_{, F. Hartjes}105_, T. Haruyama66_{, A. Harvey}56_{, S. Hasegawa}101_{, Y. Hasegawa}140_{, S. Hassani}136_{, M. Hatch}29_{, D. Hauff}99_{, S. Haug}16_, M. Hauschild29_{, R. Hauser}88_{, M. Havranek}20_{, B.M. Hawes}118_{, C.M. Hawkes}17_{, R.J. Hawkings}29_{, D. Hawkins}163_, T. Hayakawa67_{, D Hayden}76_{, H.S. Hayward}73_{, S.J. Haywood}129_{, E. Hazen}21_{, M. He}32d_{, S.J. Head}17_{, V. Hedberg}79_, L. Heelan7_{, S. Heim}88_{, B. Heinemann}14_{, S. Heisterkamp}35_{, L. Helary}4_{, M. Heller}115_{, S. Hellman}146a,146b_,

D. Hellmich20_{, C. Helsens}11_{, R.C.W. Henderson}71_{, M. Henke}58a_{, A. Henrichs}54_{, A.M. Henriques Correia}29_,

S. Henrot-Versille115_{, F. Henry-Couannier}83_{, C. Hensel}54_{, T. Henß}174_{, C.M. Hernandez}7_{, Y. Hern´andez Jim´enez}167_, R. Herrberg15, A.D. Hershenhorn152, G. Herten48, R. Hertenberger98, L. Hervas29, N.P. Hessey105, A. Hidvegi146a, E. Hig´on-Rodriguez167_{, D. Hill}5,∗_{, J.C. Hill}27_{, N. Hill}5_{, K.H. Hiller}41_{, S. Hillert}20_{, S.J. Hillier}17_{, I. Hinchliffe}14_, E. Hines120_{, M. Hirose}116_{, F. Hirsch}42_{, D. Hirschbuehl}174_{, J. Hobbs}148_{, N. Hod}153_{, M.C. Hodgkinson}139_, P. Hodgson139_{, A. Hoecker}29_{, M.R. Hoeferkamp}103_{, J. Hoffman}39_{, D. Hoffmann}83_{, M. Hohlfeld}81_{, M. Holder}141_, S.O. Holmgren146a_{, T. Holy}127_{, J.L. Holzbauer}88_{, Y. Homma}67_{, T.M. Hong}120_{, L. Hooft van Huysduynen}108_, T. Horazdovsky127_{, C. Horn}143_{, S. Horner}48_{, K. Horton}118_{, J-Y. Hostachy}55_{, S. Hou}151_{, M.A. Houlden}73_, A. Hoummada135a_{, J. Howarth}82_{, D.F. Howell}118_{, I. Hristova}15_{, J. Hrivnac}115_{, I. Hruska}125_{, T. Hryn’ova}4_, P.J. Hsu175_{, S.-C. Hsu}14_{, G.S. Huang}111_{, Z. Hubacek}127_{, F. Hubaut}83_{, F. Huegging}20_{, T.B. Huffman}118_, E.W. Hughes34_{, G. Hughes}71_{, R.E. Hughes-Jones}82_{, M. Huhtinen}29_{, P. Hurst}57_{, M. Hurwitz}14_{, U. Husemann}41_, N. Huseynov65,o_{, J. Huston}88_{, J. Huth}57_{, G. Iacobucci}49_{, G. Iakovidis}9_{, M. Ibbotson}82_{, I. Ibragimov}141_,

M. Ikeno66_{, Y. Ilchenko}39_{, D. Iliadis}154_{, D. Imbault}78_{, M. Imhaeuser}174_{, M. Imori}155_{, T. Ince}20_{, J. Inigo-Golfin}29_, P. Ioannou8_{, M. Iodice}134a_{, G. Ionescu}4_{, A. Irles Quiles}167_{, K. Ishii}66_{, A. Ishikawa}67_{, M. Ishino}68_,

R. Ishmukhametov39_{, C. Issever}118_{, S. Istin}18a_{, A.V. Ivashin}128_{, W. Iwanski}38_{, H. Iwasaki}66_{, J.M. Izen}40_, V. Izzo102a_{, B. Jackson}120_{, J.N. Jackson}73_{, P. Jackson}143_{, M.R. Jaekel}29_{, V. Jain}61_{, K. Jakobs}48_{, S. Jakobsen}35_, J. Jakubek127_{, D.K. Jana}111_{, E. Jankowski}158_{, E. Jansen}77_{, A. Jantsch}99_{, M. Janus}20_{, G. Jarlskog}79_{, L. Jeanty}57_, K. Jelen37_{, 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. Ji}81_, J. Jia148_{, Y. Jiang}32b_{, M. Jimenez Belenguer}41_{, G. Jin}32b_{, S. Jin}32a_{, O. Jinnouchi}157_{, M.D. Joergensen}35_{, D. Joffe}39_, L.G. Johansen13_{, 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_{, T. Jovin}12b_{, X. Ju}130_{, V. Juranek}125_{, P. Jussel}62_{, A. Juste Rozas}11_,

V.V. Kabachenko128_{, S. Kabana}16_{, M. Kaci}167_{, A. Kaczmarska}38_{, P. Kadlecik}35_{, M. Kado}115_{, H. Kagan}109_, M. Kagan57_{, S. Kaiser}99_{, E. Kajomovitz}152_{, S. Kalinin}174_{, L.V. Kalinovskaya}65_{, S. Kama}39_{, N. Kanaya}155_, M. Kaneda29_{, T. Kanno}157_{, V.A. Kantserov}96_{, J. Kanzaki}66_{, B. Kaplan}175_{, A. Kapliy}30_{, J. Kaplon}29_{, D. Kar}43_, M. Karagoz118_{, M. Karnevskiy}41_{, K. Karr}5_{, V. Kartvelishvili}71_{, A.N. Karyukhin}128_{, L. Kashif}172_{, A. Kasmi}39_, R.D. Kass109, A. Kastanas13, M. Kataoka4, Y. Kataoka155, E. Katsoufis9, J. Katzy41, V. Kaushik6, K. Kawagoe67, T. Kawamoto155_{, G. Kawamura}81_{, M.S. Kayl}105_{, V.A. Kazanin}107_{, M.Y. Kazarinov}65_{, J.R. Keates}82_{, R. Keeler}169_, R. Kehoe39_{, M. Keil}54_{, G.D. Kekelidze}65_{, M. Kelly}82_{, J. Kennedy}98_{, C.J. Kenney}143_{, M. Kenyon}53_{, O. Kepka}125_, N. Kerschen29_{, B.P. Kerˇsevan}74_{, S. Kersten}174_{, K. Kessoku}155_{, C. Ketterer}48_{, J. Keung}158_{, M. Khakzad}28_, F. Khalil-zada10_{, H. Khandanyan}165_{, A. Khanov}112_{, D. Kharchenko}65_{, A. Khodinov}96_{, A.G. Kholodenko}128_,

A. Khomich58a_{, T.J. Khoo}27_{, G. Khoriauli}20_{, A. Khoroshilov}174_{, N. Khovanskiy}65_{, V. Khovanskiy}95_{, E. Khramov}65_, J. Khubua51_{, H. Kim}7_{, 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. King118_{, J. Kirk}129_{, L.E. Kirsch}22_{, A.E. Kiryunin}99_{, T. Kishimoto}67_{, D. Kisielewska}37_{, T. Kittelmann}123_, A.M. Kiver128_{, 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_{, N.S. Knecht}158_{, E. Kneringer}62_{, J. Knobloch}29_,

E.B.F.G. Knoops83, A. Knue54, B.R. Ko44, T. Kobayashi155, M. Kobel43, M. Kocian143, A. Kocnar113, P. Kodys126, K. K¨oneke29_{, A.C. K¨onig}104_{, S. Koenig}81_{, L. K¨opke}81_{, F. Koetsveld}104_{, P. Koevesarki}20_{, T. Koffas}28_,

E. Koffeman105_{, F. Kohn}54_{, Z. Kohout}127_{, T. Kohriki}66_{, T. Koi}143_{, T. Kokott}20_{, G.M. Kolachev}107_{, H. Kolanoski}15_, V. Kolesnikov65_{, I. Koletsou}89a_{, J. Koll}88_{, D. Kollar}29_{, M. Kollefrath}48_{, S.D. Kolya}82_{, A.A. Komar}94_{, Y. Komori}155_, T. Kondo66_{, T. Kono}41,p_{, A.I. Kononov}48_{, R. Konoplich}108,q_{, N. Konstantinidis}77_{, A. Kootz}174_{, S. Koperny}37_, S.V. Kopikov128_{, K. Korcyl}38_{, K. Kordas}154_{, V. Koreshev}128_{, A. Korn}118_{, A. Korol}107_{, I. Korolkov}11_,

E.V. Korolkova139_{, V.A. Korotkov}128_{, O. Kortner}99_{, S. Kortner}99_{, V.V. Kostyukhin}20_{, M.J. Kotam¨aki}29_{, S. Kotov}99_, V.M. Kotov65_{, A. Kotwal}44_{, C. Kourkoumelis}8_{, V. Kouskoura}154_{, A. Koutsman}105_{, R. Kowalewski}169_,

T.Z. Kowalski37_{, W. Kozanecki}136_{, A.S. Kozhin}128_{, V. Kral}127_{, V.A. Kramarenko}97_{, G. Kramberger}74_, 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_, T. Kruker16, Z.V. Krumshteyn65, A. Kruth20, T. Kubota86, S. Kuehn48, A. Kugel58c, T. Kuhl41, D. Kuhn62, V. Kukhtin65_{, Y. Kulchitsky}90_{, 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_,

J. Kvita29_{, R. Kwee}15_{, A. La Rosa}172_{, L. La Rotonda}36a,36b_{, L. Labarga}80_{, J. Labbe}4_{, S. Lablak}135a_{, C. Lacasta}167_, F. Lacava132a,132b_{, H. Lacker}15_{, D. Lacour}78_{, V.R. Lacuesta}167_{, E. Ladygin}65_{, R. Lafaye}4_{, B. Laforge}78_,

T. Lagouri80_{, S. Lai}48_{, E. Laisne}55_{, M. Lamanna}29_{, C.L. Lampen}6_{, W. Lampl}6_{, E. Lancon}136_{, U. Landgraf}48_, M.P.J. Landon75_{, H. Landsman}152_{, J.L. Lane}82_{, C. Lange}41_{, A.J. Lankford}163_{, F. Lanni}24_{, K. Lantzsch}29_,

S. Laplace78_{, C. Lapoire}20_{, J.F. Laporte}136_{, T. Lari}89a_{, A.V. Larionov}128_{, A. Larner}118_{, C. Lasseur}29_{, M. Lassnig}29_, P. Laurelli47_{, A. Lavorato}118_{, W. Lavrijsen}14_{, P. Laycock}73_{, A.B. Lazarev}65_{, O. Le Dortz}78_{, E. Le Guirriec}83_, C. Le Maner158_{, E. Le Menedeu}136_{, C. Lebel}93_{, T. LeCompte}5_{, F. Ledroit-Guillon}55_{, H. Lee}105_{, J.S.H. Lee}150_, S.C. Lee151_{, L. Lee}175_{, M. Lefebvre}169_{, M. Legendre}136_{, A. Leger}49_{, B.C. LeGeyt}120_{, F. Legger}98_{, C. Leggett}14_, M. Lehmacher20, G. Lehmann Miotto29, X. Lei6, M.A.L. Leite23d, R. Leitner126, D. Lellouch171, M. Leltchouk34, B. Lemmer54_{, V. Lendermann}58a_{, K.J.C. Leney}145b_{, T. Lenz}105_{, G. Lenzen}174_{, B. Lenzi}29_{, K. Leonhardt}43_, S. Leontsinis9_{, C. Leroy}93_{, J-R. Lessard}169_{, J. Lesser}146a_{, C.G. Lester}27_{, A. Leung Fook Cheong}172_{, J. Levˆeque}4_, D. Levin87_{, L.J. Levinson}171_{, M.S. Levitski}128_{, M. Lewandowska}21_{, A. Lewis}118_{, G.H. Lewis}108_{, A.M. Leyko}20_, M. Leyton15_{, B. Li}83_{, H. Li}172_{, S. Li}32b,d_{, X. Li}87_{, Z. Liang}39_{, Z. Liang}118,r_{, H. Liao}33_{, B. Liberti}133a_{, P. Lichard}29_, M. Lichtnecker98_{, K. Lie}165_{, W. Liebig}13_{, R. Lifshitz}152_{, J.N. Lilley}17_{, C. Limbach}20_{, A. Limosani}86_{, M. Limper}63_, S.C. Lin151,s_{, F. Linde}105_{, J.T. Linnemann}88_{, E. Lipeles}120_{, L. Lipinsky}125_{, A. Lipniacka}13_{, T.M. Liss}165_,

D. Lissauer24_{, A. Lister}49_{, A.M. Litke}137_{, C. Liu}28_{, D. Liu}151,t_{, H. Liu}87_{, J.B. Liu}87_{, M. Liu}32b_{, S. Liu}2_{, Y. Liu}32b_, M. Livan119a,119b_{, S.S.A. Livermore}118_{, A. Lleres}55_{, J. Llorente Merino}80_{, S.L. Lloyd}75_{, E. Lobodzinska}41_{, P. Loch}6_, W.S. Lockman137_{, T. Loddenkoetter}20_{, F.K. Loebinger}82_{, A. Loginov}175_{, C.W. Loh}168_{, T. Lohse}15_{, K. Lohwasser}48_, M. Lokajicek125_{, J. Loken}118_{, V.P. Lombardo}4_{, R.E. Long}71_{, L. Lopes}124a,b_{, D. Lopez Mateos}57_{, M. Losada}162_,