Abstract
The performance of the electron and photon reconstruction and selection with the CMS detector at s=8 TeV is presented. Selection criteria and efficiency measurements in data and simulation are shown. The electron and photon energy scale calibration and resolution are also discussed, with particular emphasis on their role in Higgs analyses.
Highlights
Several physics processes under study at the LHC are characterized by the presence of electrons or photons in the final state
Electron and photon energy needs to be measured with good resolution and high accuracy in terms of the absolute energy scale
In the case of electrons, the ECAL supercluster energy measurement is complemented by the GSF track fit, which provides a better resolution at low transverse momentum
Summary
Several physics processes under study at the LHC are characterized by the presence of electrons or photons in the final state. Electron and photon energy needs to be measured with good resolution and high accuracy in terms of the absolute energy scale. This is especially important for the studies of the Higgs boson in the four lepton and two photon decay channels, as well as in the studies of the W and Z bosons. The choice of the η direction is needed to avoid distorsions from the opening up of the charged energy flow in the magnetic field. This variable takes in average larger values for the background of neutral mesons decaying to two collimated photons, that are reconstructed as a single supercluster
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
