615 research outputs found

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

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    International audienceA measurement of the dijet production cross section is reported based on proton-proton collision data collected in 2016 at s\sqrt{s} = 13 TeV by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of up to 36.3 fb‚ąí1^{-1}. Jets are reconstructed with the anti-kTk_\mathrm{T} algorithm for distance parameters of RR = 0.4 and 0.8. Cross sections are measured double-differentially (2D) as a function of the largest absolute rapidity ‚ą£ymax‚ą£\lvert y_\text{max}\rvert of the two jets with the highest transverse momenta pTp_\mathrm{T} and their invariant mass m1,2m_{1,2}, and triple-differentially (3D) as a function of the rapidity separation y‚ąóy^*, the total boost yby_\mathrm{b}, and either m1,2m_{1,2} or the average pTp_\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 őĪS\alpha_\mathrm{S} = 0.1179 ¬Ī\pm 0.0019

    Measurement of the primary Lund jet plane density in proton-proton collisions at s\sqrt{s} = 13 TeV