Speaker
Kirill Grevtsov
(Centre National de la Recherche Scientifique (FR))
Description
An excellent electron and photon performance is crucial for precision
results from high energy proton-proton collisions with electrons and
photons in the final state.
Identification, energy calibration, response uniformity and linearity for
electrons and photons with the ATLAS detector during the LHC run I will be
presented.
Events with W and Z bosons and J/psi mesons are employed to benchmark these
performance parameters. The uncertainties of the measured identification
efficiencies are at the few per mil level for electron transverse energy
greater than 30 GeV and in the range of 1-2% for high energy photons The
achieved calibration for electrons from Z decays is typically accurate to
0.05% in most of the detector acceptance, rising to 0.2% in regions with
large amounts of passive material and is on average 0.3% for photons.
The stability of the electron energy response as a function of the mean
number of interactions per bunch crossing and as a function of time show
stability at the level of 0.05%.
Early Run2 results will be presented if available.
additional information
Submitted on behalf of the ATLAS Electron/Gamma Combined Performance Group by the ATLAS Speakers Committee representative Alex Read (a.l.read@fys.uio.no). Alex is NOT the poster author/presenter!
Author
Kirill Grevtsov
(Centre National de la Recherche Scientifique (FR))
