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

Abstract : We present measurements of the differential cross section $d\sigma/dp_{T}^{\gamma}$ for the associated production of a $c$-quark jet and an 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 cross section ratios $\sigma(\gamma+c)/\sigma(\gamma+b)$ as a function of $p_{T}^{\gamma}$ are also presented. The results are based on data corresponding to an integrated luminosity of 8.7 fb$^{-1}$ recorded with the D0 detector at the Fermilab Tevatron $p\bar{p}$ Collider at $\sqrt{s}=$1.96 TeV. The obtained results are compared to next-to-leading order perturbative QCD calculations using various parton distribution functions, to predictions based on the $k_{T}$-factorization approach, and to predictions from the Sherpa and Pythia Monte Carlo event generators.
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Journal articles
Physics Letters B, Elsevier, 2013, 719, pp.354-361. <10.1016/j.physletb.2013.01.033>


http://hal.in2p3.fr/in2p3-00743447
Contributor : Sylvie Florès <>
Submitted on : Friday, October 19, 2012 - 7:00:49 AM
Last modification on : Wednesday, October 8, 2014 - 2:00:49 PM

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V.M. Abazov, U. Bassler, G. Bernardi, M. Besançon, D. Brown, et al.. Measurement of the differential photon+ c-jet cross sections and the ratio of photon+ c and photon+ b cross sections in proton-antiproton collisions at sqrt(s) = 1.96 TeV. Physics Letters B, Elsevier, 2013, 719, pp.354-361. <10.1016/j.physletb.2013.01.033>. <in2p3-00743447>

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