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We present measurements of the differential cross section$d\sigma/dp_{T}^{\gamma}$ for the associated production of a $c$-quark jet andan isolated photon with rapidity $|y^{\gamma}|< 1.0$ and transverse momentum$30 < p_{T}^{\gamma} < 300$ GeV. The $c$-quark jets are required to have$|y^{jet}| < 1.5$ and $p_{T}^{jet} >15$ GeV. The ratio of differential crosssections for photon+ c and photon+ b production as a function of$p_{T}^{\gamma}$ is also presented. The results are based on data correspondingto an integrated luminosity of 8.7 fb$^{-1}$ recorded with the D0 detector atthe Fermilab Tevatron $p\bar{p}$ Collider at $\sqrt{s}=$1.96 TeV. The obtainedresults are compared to next-to-leading order perturbative QCD calculationsusing various parton distribution functions, to predictions based on the$k_{T}$-factorization approach, and to predictions from the Sherpa and PythiaMonte Carlo event generators.

physics letters b

Measurement of the differential photon+ c-jet cross section and the  ratio of differential photon+ c and photon+ b cross sections in  proton-antiproton collisions at sqrt(s) = 1.96 TeV