Measurement of multidifferential cross sections for dijet production in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Abstract

A measurement of the dijet production cross section is reported based on proton-proton collision data collected in 2016 at $\sqrt{s}$ = 13 TeV by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of up to 36.3 fb${}^{-1}$. Jets are reconstructed with the anti-$k_{\mathrm{T}}$ algorithm for distance parameters of $R$ = 0.4 and 0.8. Cross sections are measured double-differentially (2D) as a function of the largest absolute rapidity $|y_{\text{max}}|$ of the two jets with the highest transverse momenta $p_{\mathrm{T}}$ and their invariant mass $m_{1,2}$, and triple-differentially (3D) as a function of the rapidity separation $y^{\ast }$, the total boost $y_{\mathrm{b}}$, and either $m_{1,2}$ or the average $p_{\mathrm{T}}$ of the two jets. The cross sections are unfolded to correct for detector effects and are compared with fixed-order calculations derived at next-to-next-to-leading order in perturbative quantum chromodynamics. The impact of the measurements on the parton distribution functions and the strong coupling constant at the mass of the Z boson is investigated, yielding a value of ${\alpha }_{\mathrm{S}}(m_{\mathrm{Z}})$ = 0.1179 $\pm$ 0.0019.

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-21-008 (CMS Public Pages)