Title:	Measurement of single-diffractive dijet production in proton–proton collisions at √ s = 8 TeV with the CMS and TOTEM experiments
Authors:	Sirunyan, A. M. Georgiev, Vjačeslav Hammerbauer, Jiří Linhart, Richard Peroutka, Zdeněk Urban, Ondřej Zich, Jan CMS, Collaboration TOTEM, Collaboration
Citation:	SIRUNYAN, AM. GEORGIEV, V. HAMMERBAUER, J. LINHART, R. PEROUTKA, Z. URBAN, O. ZICH, J. CMS, C. TOTEM, C. Measurement of single-diffractive dijet production in proton–proton collisions at √ s = 8 TeV with the CMS and TOTEM experiments. EUROPEAN PHYSICAL JOURNAL C, 2020, roč. 80, č. 12, s. 1-30. ISSN: 1434-6044
Issue Date:	2020
Publisher:	Springer
Document type:	článek article
URI:	2-s2.0-85102351243 http://hdl.handle.net/11025/47781
ISSN:	1434-6044
Keywords in different language:	dijet;LHC;proton-proton collisions;particle physics
Abstract in different language:	Measurements are presented of the single-diffractive dijet cross section and the diffractive cross section as a function of the proton fractional momentum loss ξ and the four-momentum transfer squared t. Both processes p p → p X and p p → X p , i.e. with the proton scattering to either side of the interaction point, are measured, where X includes at least two jets; the results of the two processes are averaged. The analyses are based on data collected simultaneously with the CMS and TOTEM detectors at the LHC in proton–proton collisions at s√=8TeV during a dedicated run with β∗=90m at low instantaneous luminosity and correspond to an integrated luminosity of 37.5nb−1. The single-diffractive dijet cross section σ p X jj, in the kinematic region ξ<0.1, 0.03<|t|<1GeV2, with at least two jets with transverse momentum pT>40GeV, and pseudorapidity |η|<4.4, is 21.7±0.9(stat)+3.0−3.3(syst)±0.9(lumi)nb. The ratio of the single-diffractive to inclusive dijet yields, normalised per unit of ξ, is presented as a function of x, the longitudinal momentum fraction of the proton carried by the struck parton. The ratio in the kinematic region defined above, for x values in the range −2.9≤log10x≤−1.6, is R=(σ p X jj/Δξ)/σjj=0.025±0.001(stat)±0.003(syst), where σ p X jj and σjj are the single-diffractive and inclusive dijet cross sections, respectively. The results are compared with predictions from models of diffractive and nondiffractive interactions. Monte Carlo predictions based on the HERA diffractive parton distribution functions agree well with the data when corrected for the effect of soft rescattering between the spectator partons.
Rights:	© CERN for the benefit of the CMS and TOTEM collaborations
Appears in Collections:	Články / Articles (KEV) Články / Articles (RICE) Články / Articles (KEI) OBD

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