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001-es BibID:	BIBFORM119765
035-os BibID:	(WoS)000459880900001 (Scopus)85062150316
Első szerző:	CMS Collaboration
Cím:	Measurements of tt differential cross sections in proton-proton collisions at root{s} = 13 TeV using events containing two leptons / CMS Collaboration
Dátum:	2019
ISSN:	1126-6708 1029-8479
Megjegyzések:	Measurements of differential top quark pair t (t) over bar cross sections using events produced in proton-proton collisions at a centre-of-mass energy of 13 TeV containing two oppositely charged leptons are presented. The data were recorded by the CMS experiment at the CERN LHC in 2016 and correspond to an integrated luminosity of 35.9 fb(-1). The differential cross sections are presented as functions of kinematic observables of the top quarks and their decay products, the t (t) over bar system, and the total number of jets in the event. The differential cross sections are de fined both with particle-level objects in a fiducial phase space close to that of the detector acceptance and with parton-level top quarks in the full phase space. All results are compared with standard model predictions from Monte Carlo simulations with next-to-leading-order (NLO) accuracy in quantum chromodynamics (QCD) at matrix-element level interfaced to parton-shower simulations. Where possible, parton-level results are compared to calculations with beyond-NLO precision in QCD. Significant disagreement is observed between data and all predictions for several observables. The measurements are used to constrain the top quark chromomagnetic dipole moment in an effective field theory framework at NLO in QCD and to extract t (t) over bar and leptonic charge asymmetries.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Hadron-Hadron scattering (experiments) Top physics
Megjelenés:	Journal of High Energy Physics. - 2019 : 2 (2019), p. 1-110. -
További szerzők:	Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
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