Study of dijet events with a large rapidity gap between the two leading jets in pp collisions at √s = 7 TeV
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10052_2018_Article_5691.pdf
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Author(s)
Sirunyan, A. M
Tumasyan, A.
Adam, W.
Asilar, E.
Bergauer, T.
Brandstetter, J.
Brondolin, E.
Dragicevic, M.
Erö, J.
Flechl, M.
Date Issued
March 2018
Journal
European Physical Journal C: Particles and Fields
Publisher
Springer Berlin Heidelberg
Citation
Sirunyan, A. M. et al. "Study of dijet events with a large rapidity gap between the two leading jets in pp collisions at √s = 7 TeV." European Physical Journal C: Particles and Fields 78 (March 2018): 242 © CERN for the benefit of the CMS collaboration 2018
Version
Final published version
Abstract
Events with no charged particles produced between the two leading jets are studied in proton-proton collisions at √s = 7 TeV. The jets were required to have transverse momentum p[subscript T][superscript jet] > 40 GeV and pseudorapidity 1.5 < η[superscript jet] < 4.7, and to have values of η [superscript jet] 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 8 pb [superscript -1]. Events with no charged particles with p[subscript T] > 0.2 GeV in the interval -1 < η < 1 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 p [subscript T] 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. Keywords: CMS; Physics; QCD Diffraction
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1140/epjc/s10052-018-5691-6
