Measurements of jet multiplicity and jet transverse momentum in multijet events in proton–proton collisions at ${\sqrt{s}=13\, \text {TeV}}$

Présentation

Multijet events at large transverse momentum ($p_{\textrm{T}}$) are measured at $\sqrt{s}=13\,\text {Te\hspace{-.08em}V} $ using data recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of $36.3{\,\text {fb}^{-1}} $. The multiplicity of jets with $p_{\textrm{T}} >50\,\text {Ge\hspace{-.08em}V} $ that are produced in association with a high-$p_{\textrm{T}}$ dijet system is measured in various ranges of the $p_{\textrm{T}}$ of the jet with the highest transverse momentum and as a function of the azimuthal angle difference $\varDelta \phi _{1,2}$ between the two highest $p_{\textrm{T}}$ jets in the dijet system. The differential production cross sections are measured as a function of the transverse momenta of the four highest $p_{\textrm{T}}$ 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.