The construction of the Insertable B-Layer and the b-tagging performance at high-pT of the ATLAS experiment

We consider several sources of systematic uncertainties on the branching fraction measure- ments: signal shape, cross-feed determination, peaking background, combinatorial

ATLAS registered the first LHC proton-proton collisions at an energy of 900 GeV and 2.36 TeV in the center of mass in December 2009.. The very good state of the ATLAS

Figure 3 shows the performance of different b-tagging algorithms as mea- sured by ATLAS based on simulated t¯ t events at 7 TeV [ 6 ], plotted in terms of the light jet

A further source for detailed debugging of the frontend chips are, among others, temperature sensors (diodes), which are built-in in the frontend chips themselves. On

Inner Detector tracking: total algorithmic execution time for LVL2 single electron reconstruction at inital luminosity; tracking is performed using data from the Pixel and SCT

TABLE I: Summary of results; ε denotes the reconstruc- tion efficiency and ε tot the total efficiency including daugh- ter branching fractions, both in percent; N is the number

L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des

L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des