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Abstract: 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 ffiffiffi s p ¼ 13 TeV. The signature is expected from hard color-singlet exchange. Each of the highest transverse momentum (pT) jets must have pjet T > 40 GeV and pseudorapidity 1.4 < j?jetj < 4.7, with ?jet1?jet2 < 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-? 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 j?j < 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 pjet2 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 fCSE in this sample is 2.91 0.70ðstatÞþ1.08 ?1.01 ðsystÞ times larger than that for inclusive dijet production in dijets with similar kinematics.
Fuente: Phys. Rev. D 104, 032009 (2021)
Editorial: American Physical Society
Fecha de publicación: 26/08/2021
Nº de páginas: 35
Tipo de publicación: Artículo de Revista
DOI: 10.1103/PhysRevD.104.032009
ISSN: 1550-7998,1550-2368,2470-0010,2470-0029
Url de la publicación: https://doi.org/10.1103/PhysRevD.104.032009
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SIRUNYAN, A. M.
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
BARBARA CHAZIN QUERO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
PEDRO JOSE FERNANDEZ MANTECA
GERVASIO GOMEZ GRAMUGLIO
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
FRANCESCA SHUN-NING ANNAROSA RICCI-TAM
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LORENZO RUSSO
LUCA SCODELLARO
IVAN VILA ALVAREZ
JESUS MANUEL VIZAN GARCIA
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