Measurement of the differential cross sections for W-boson production in association with jets in p(p)over-bar collisions at root s=1.96 TeV
2018
Measurements are presented of differential cross sections for the production
of Z bosons in association with at least one jet initiated by a charm quark in
pp collisions at $\sqrt{s}=$ 13 TeV. The data recorded by the CMS experiment at
the LHC correspond to an integrated luminosity of 35.9 fb$^{-1}$. The final
states that contain a pair of electrons or muons that are the decay products of
a Z boson, and a jet consistent with being initiated by a charm quark produced
in the hard interaction. Differential cross sections as a function of the
$p_\mathrm{T}$ of the Z boson and $p_\mathrm{T}$ of the charm jet are compared
with predictions from Monte Carlo event generators. The inclusive production
cross section 405.4 $\pm$ 5.6 (stat) $\pm$ 24.3 (exp) $\pm$ 3.7 (thy) pb, is
measured in a fiducial region requiring both leptons to have
$\vert\eta\vert\lt$ 2.4 and $p_\mathrm{T}\gt10$ GeV, at least one lepton with
$p_\mathrm{T}\gt$ 26 GeV, and a mass of the pair in the range 71-111 GeV, while
the charm jet is required to have $p_\mathrm{T} \gt $ 30 GeV and
$\vert\eta\vert\lt$ 2.4. These are the first measurements of these cross
sections in proton-proton collisions at 13 TeV.
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