Electron and photon performance measurements with the ATLAS detector using the 2015–2017 LHC proton-proton collision data

• Published in: Journal of instrumentation Vol. 14; no. 12; p. P12006
• Main Authors: Aad, G., Abbott, B., Abbott, D.C., Abud, A. Abed, Abeling, K., Abhayasinghe, D.K., Abidi, S.H., AbouZeid, O.S., Abraham, N.L., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B.S., Achkar, B., Adachi, S., Adam, L., Bourdarios, C. Adam, Adamczyk, L., Adamek, L., Adelman, J., Adersberger, M., Adiguzel, A., Adorni, S., Adye, T., Affolder, A.A., Afik, Y., Agapopoulou, C., Agaras, M.N., Aggarwal, A., Agheorghiesei, C., Aguilar-Saavedra, J.A., Ahmadov, F., Ahmed, W.S., Ai, X., Aielli, G., Akatsuka, S., Åkesson, T.P.A., Akilli, E., Akimov, A.V., Khoury, K. Al, Alberghi, G.L., Albert, J., Verzini, M.J. Alconada, Alderweireldt, S., Aleksa, M., Aleksandrov, I.N., Alexa, C., Alexandre, D., Alexopoulos, T., Alfonsi, A., Alfonsi, F., Alhroob, M., Ali, B., Alimonti, G., Alison, J., Alkire, S.P., Allaire, C., Allbrooke, B.M.M., Allen, B.W., Allport, P.P., Aloisio, A., Alonso, A., Alonso, F., Alpigiani, C., Alshehri, A.A., Estevez, M. Alvarez, Piqueras, D. Álvarez, Alviggi, M.G., Coutinho, Y. Amaral, Ambler, A., Ambroz, L., Amelung, C., Amidei, D., Santos, S.P. Amor Dos, Amoroso, S., Amrouche, C.S., An, F., Anastopoulos, C., Andari, N., Andeen, T., Anders, C.F., Anders, J.K., Andreazza, A., Andrei, V., Anelli, C.R., Angelidakis, S., Angerami, A., Anisenkov, A.V., Annovi, A., Antel, C., Anthony, M.T., Antonelli, M., Antrim, D.J.A., Anulli, F., Aoki, M., Pozo, J.A. Aparisi, Bella, L. Aperio, Arabidze, G., Araque, J.P., Ferraz, V. Araujo
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 2019; Institute of Physics (IOP)
• Subjects: Algorithms; ATLAS detectors; Clustering; Clustering algorithms; Electrons; Energy calibration; Fysik; High energy physics detector; Isolation efficiencies; Large Hadron Collider; Natural Sciences; Naturvetenskap; Particle collisions; Particle Identification Method; Particle identification methods; Performance measurements; Performance of High Energy Physics Detectors; Photons; Physical Sciences; Proton proton collisions; Protons; Subatomic Physics; Subatomär fysik; Tellurium compounds
• ISSN: 1748-0221; 1748-0221
• DOI: 10.1088/1748-0221/14/12/P12006

This paper describes the reconstruction of electrons and photons with the ATLAS detector, employed for measurements and searches exploiting the complete LHC Run 2 dataset. An improved energy clustering algorithm is introduced, and its implications for the measurement and identification of prompt electrons and photons are discussed in detail. Corrections and calibrations that affect performance, including energy calibration, identification and isolation efficiencies, and the measurement of the charge of reconstructed electron candidates are determined using up to 81 fb−1 of proton-proton collision data collected at s=13 TeV between 2015 and 2017.