Measurements of jet multiplicity and jet transverse momentum in multijet events in proton–proton collisions at √s = 13 TeV

Abstract

Abstract Multijet events at large transverse momentum (

$$p_{\textrm{T}}$$

p T

) are measured at

$$\sqrt{s}=13\,\text {TeV} $$

s

= 13

TeV

using data recorded with the CMS detector at the LHC, corresponding to an integrated luminosity of

$$36.3{\,\text {fb}^{-1}} $$

36.3

fb

- 1

. The multiplicity of jets with

$$p_{\textrm{T}} >50\,\text {GeV} $$

p T

> 50

GeV

that are produced in association with a high-

$$p_{\textrm{T}}$$

p T

dijet system is measured in various ranges of the

$$p_{\textrm{T}}$$

p T

of the jet with the highest transverse momentum and as a function of the azimuthal angle difference

$$\varDelta \phi _{1,2}$$

Δ

ϕ

1 , 2

between the two highest

$$p_{\textrm{T}}$$

p T

jets in the dijet system. The differential production cross sections are measured as a function of the transverse momenta of the four highest

$$p_{\textrm{T}}$$

p 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.