Measurements of jet multiplicity and jet transverse momentum in multijet events in proton-proton collisions at [Formula: see text]

在质子-质子碰撞中,多喷注事件的喷注多重性和喷注横向动量测量 [公式:见正文]

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Abstract

Multijet events at large transverse momentum (pT) are measured at [Formula: see text] using data recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of 36.3 fb-1. The multiplicity of jets with pT > 50 Ge V that are produced in association with a high-pT dijet system is measured in various ranges of the pT of the jet with the highest transverse momentum and as a function of the azimuthal angle difference Δϕ1,2 between the two highest pT jets in the dijet system. The differential production cross sections are measured as a function of the transverse momenta of the four highest pT jets. The measurements are compared with leading and next-to-leading order matrix element calculations supplemented with simulations of parton shower, hadronization, and multiparton interactions. In addition, the measurements are compared with next-to-leading order matrix element calculations combined with transverse-momentum dependent parton densities and transverse-momentum dependent parton shower.

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