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- Title
Study of dijet events with a large rapidity gap between the two leading jets in pp collisions at s=7TeV.
- Authors
Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Flechl, M.; CMS Collaboration
- Abstract
Events with no charged particles produced between the two leading jets are studied in proton-proton collisions at s=7<inline-graphic></inline-graphic>TeV<inline-graphic></inline-graphic>. The jets were required to have transverse momentum pTjet>40<inline-graphic></inline-graphic>GeV<inline-graphic></inline-graphic> and pseudorapidity 1.5<|ηjet|<4.7<inline-graphic></inline-graphic>, and to have values of ηjet<inline-graphic></inline-graphic> with opposite signs. The data used for this study were collected with the CMS detector during low-luminosity running at the LHC, and correspond to an integrated luminosity of 8pb-1<inline-graphic></inline-graphic>. Events with no charged particles with pT>0.2<inline-graphic></inline-graphic>GeV<inline-graphic></inline-graphic> in the interval -1<η<1<inline-graphic></inline-graphic> between the jets are observed in excess of calculations that assume no color-singlet exchange. The fraction of events with such a rapidity gap, amounting to 0.5-1% of the selected dijet sample, is measured as a function of the pT<inline-graphic></inline-graphic> of the second-leading jet and of the rapidity separation between the jets. The data are compared to previous measurements at the Tevatron, and to perturbative quantum chromodynamics calculations based on the Balitsky-Fadin-Kuraev-Lipatov evolution equations, including different models of the non-perturbative gap survival probability.
- Subjects
ASTROPHYSICAL collisions; PROTONS; LUMINOSITY; QUANTUM chromodynamics; TEVATRON
- Publication
European Physical Journal C -- Particles & Fields, 2018, Vol 78, Issue 3, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-018-5691-6