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001-es BibID:	BIBFORM120704
035-os BibID:	(Scopus)85114162630 (WoS)000689736000001
Első szerző:	Sirunyan, A. M. (fizikus)
Cím:	Hard color-singlet exchange in dijet events in proton-proton collisions at root{s}=13 TeV / A. M. Sirunyan, CMS Collaboration, TOTEM Collaboration
Dátum:	2021
ISSN:	2470-0010 2470-0029
Megjegyzések:	Events where the two leading jets are separated by a pseudorapidity interval devoid of particle activity, known as jet-gap-jet events, are studied in proton-proton collisions at root{s}=13 TeV. The signature is expected from hard color-singlet exchange. Each of the highest transverse momentum (p_T) jets must have p^jet_T > 40 GeV and pseudorapidity 1.4<\|[eta]^jet\|<4.7, with [eta]^jet1[eta]^jet2 < 0, where jet1 and jet2 are the leading and subleading jets in p_T, respectively. The analysis is based on data collected by the CMS and TOTEM experiments during a low luminosity, high-[beta]^* run at the CERN LHC in 2015, with an integrated luminosity of 0.66 pb^-1. Events with a low number of charged particles with p_T>0.2 GeV in the interval \|[eta]\|<1 between the jets are observed in excess of calculations that assume only color-exchange. The fraction of events produced via color-singlet exchange, fCSE, is measured as a function of p^jet2_T, the pseudorapidity difference between the two leading jets, and the azimuthal angular separation between the two leading jets. The fraction fCSE has values of 0.4-1.0%. The results are compared with previous measurements and with predictions from perturbative quantum chromodynamics. In addition, the first study of jet-gap-jet events detected in association with an intact proton using a subsample of events with an integrated luminosity of 0.40 pb^-1 is presented. The intact protons are detected with the Roman pot detectors of the TOTEM experiment. The f_{CSE} in this sample is 2.91+/-0.70(stat)^+1.08_-1.01(syst) times larger than that for inclusive dijet production in dijets with similar kinematics.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Physical Review D. - 104 : 3 (2021), p. 1-35. -
További szerzők:	Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus) CMS Collaboration TOTEM Collaboration
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