Název:	Hard color-singlet exchange in dijet events in proton-proton collisions at √s=13 TeV
Autoři:	Sirunyan, A. N. Georgiev, Vjačeslav Hammerbauer, Jiří Linhart, Richard Peroutka, Zdeněk Urban, Ondřej Vavroch, Ondřej Zich, Jan CMS, Collaboration TOTEM, Collaboration
Citace zdrojového dokumentu:	SIRUNYAN, AN. GEORGIEV, V. HAMMERBAUER, J. LINHART, R. PEROUTKA, Z. URBAN, O. VAVROCH, O. ZICH, J. CMS, C. TOTEM, C. Hard color-singlet exchange in dijet events in proton-proton collisions at √s=13 TeV. Physical Review D, 2021, roč. 104, č. 3, s. "032009-1" - "032009-35". ISSN: 2470-0010
Datum vydání:	2021
Nakladatel:	American Physical Society
Typ dokumentu:	článek article
URI:	2-s2.0-85114162630 http://hdl.handle.net/11025/47782
ISSN:	2470-0010
Klíčová slova v dalším jazyce:	color-singled exchange;dijet events;LHC;proton-proton collisions;particle physics
Abstrakt v dalším jazyce:	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 √s=13 TeV. The signature is expected from hard color-singlet exchange. Each of the highest transverse momentum (pT) jets must have pjetT>40 GeV and pseudorapidity 1.4<|ηjet|<4.7, with ηjet1ηjet2<0, where jet1 and jet2 are the leading and subleading jets in pT, respectively. The analysis is based on data collected by the CMS and TOTEM experiments during a low luminosity, high-β∗ 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 pT>0.2 GeV in the interval |η|<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 pjet2T, 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 fCSE 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.
Práva:	© Creative Commons Attribution 4.0 International
Vyskytuje se v kolekcích:	Články / Articles (KEV) Články / Articles (RICE) Články / Articles (KEI) OBD

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