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Physics Letters B 719 (2013) 354-361
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
V.M. Abazov, U. Bassler1, G. Bernardi2, M. Besançon1, D. Brown2, J. Brown2, E. Chapon1, S. Chevalier-Thery1, F. Couderc1, A. Croc1, F. Deliot1, C. Deterre1, Y. Enari2, G. Grenier3, A. Grohsjean1, Z. Hubacek1, T. Kurca3, P. Lebrun3, J. Lellouch2, D. Li2, F. Miconi4, I. Ripp-Baudot4, C. Royon1, B. Tuchming1, P. Verdier3, D. Vilanova1, L. Zivkovic2, J.-F. Grivaz5, T. Guillemin5, M. Jaffré5, P. Pétroff5, F. Badaud6, P. Gay6, Ph. Gris6, H. Li7, G. Sajot7, J. Stark7
For the D0 collaboration(s)
(2013)

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.
1:  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
2:  LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
3:  IPNL - Institut de Physique Nucléaire de Lyon
4:  IPHC - Institut Pluridisciplinaire Hubert Curien
5:  LAL - Laboratoire de l'Accélérateur Linéaire
6:  LPC - Laboratoire de Physique Corpusculaire [Clermont-Ferrand]
7:  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
Physics/High Energy Physics - Experiment
Fulltext link: 
http://fr.arXiv.org/abs/1210.5033