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001-es BibID:	BIBFORM119659
035-os BibID:	(Scopus)85130229019 (WoS)000797503900001
Első szerző:	CMS Collaboration
Cím:	Measurement of the inclusive and differential tt[overline][gamma] cross sections in the dilepton channel and effective field theory interpretation in proton-proton collisions at root{s} = 13 TeV / The CMS collaboration
Dátum:	2022
ISSN:	1126-6708 1029-8479
Megjegyzések:	The production cross section of a top quark pair in association with a photon is measured in proton-proton collisions in the decay channel with two oppositely charged leptons (e^+/-[mu]^+/-,e^+e^-, or [mu]^+[mu]^-). The measurement is performed using 138 fb^-1 of proton-proton collision data recorded by the CMS experiment at root{s} = 13 TeV during the 2016-2018 data-taking period of the CERN LHC. A fiducial phase space is defined such that photons radiated by initial-state particles, top quarks, or any of their decay products are included. An inclusive cross section of 175.2 +/- 2.5(stat) +/- 6.3(syst) fb is measured in a signal region with at least one jet coming from the hadronization of a bottom quark and exactly one photon with transverse momentum above 20 GeV. Differential cross sections are measured as functions of several kinematic observables of the photon, leptons, and jets, and compared to standard model predictions. The measurements are also interpreted in the standard model effective field theory framework, and limits are found on the relevant Wilson coefficients from these results alone and in combination with a previous CMS measurement of the tt[overline][gamma] production process using the lepton+jets final state.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Hadron-Hadron Scattering Top Physics
Megjelenés:	Journal of High Energy Physics. - 2022 : 5 (2022), p. 1-58. -
További szerzők:	Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
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