Observation of photon-induced W.sup.+./sup.W.sup.−./sup. production in pp collisions at √s=13 TeV using the ATLAS detector

0549089 - FZÚ 2022 RIV NL eng J - Článek v odborném periodiku
Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Latoňová, Věra - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … celkem 2928 autorů
Observation of photon-induced W⁺W⁻ production in pp collisions at √s=13 TeV using the ATLAS detector.
Physics Letters. B. Roč. 816, May (2021), č. článku 136190. ISSN 0370-2693. E-ISSN 1873-2445
Grant CEP: GA MŠMT(CZ) LTT17018
Výzkumná infrastruktura: CERN-CZ II - 90104
Institucionální podpora: RVO:68378271
Klíčová slova: ATLAS * numerical calculations: Monte Carlo * electron * muon
Obor OECD: Particles and field physics
Impakt faktor: 4.950, rok: 2021
Způsob publikování: Open access

This letter reports the observation of photon-induced production of W -boson pairs, γγ→WW . The analysis uses 139 fb −1 of LHC proton–proton collision data taken at s=13 TeV recorded by the ATLAS experiment during the years 2015–2018. The measurement is performed selecting one electron and one muon, corresponding to the decay of the diboson system as WW→e±νμ∓ν final state. The background-only hypothesis is rejected with a significance of well above 5 standard deviations consistent with the expectation from Monte Carlo simulation. A cross section for the γγ→WW process of 3.13±0.31(stat.)±0.28(syst.) fb is measured in a fiducial volume close to the acceptance of the detector, by requiring an electron and a muon of opposite signs with large dilepton transverse momentum and exactly zero additional charged particles. This is found to be in agreement with the Standard Model prediction.

Trvalý link: http://hdl.handle.net/11104/0325109