Measurement of 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. Bassler; G. Bernardi; M. Besançon; D. Brown; J. Brown; E. Chapon; S. Chevalier-Thery; F. Couderc; A. Croc; F. Deliot; C. Deterre; Y. Enari; G. Grenier; A. Grohsjean; Z. Hubacek; T. Kurca; P. Lebrun; J. Lellouch; D. Li; F. Miconi; I. Ripp-Baudot; C. Royon; B. Tuchming; P. Verdier; D. Vilanova; L. Zivkovic; J.-F. Grivaz; T. Guillemin; M. Jaffré; P. Pétroff; F. Badaud; P. Gay; Ph. Gris; H. Li; G. Sajot; J. Stark

HAL: in2p3-00743447, version 1

arXiv: 1210.5033

DOI: 10.1016/j.physletb.2013.01.033

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Physics Letters B 719 (2013) 354-361

Measurement of 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-CLERMONT - Laboratoire de Physique Corpusculaire de Clermont-Ferrand

7:	LPSC - Laboratoire de Physique Subatomique et de Cosmologie

Subject(s)

Physics/High Energy Physics - Experiment

Fulltext link:

http://fr.arXiv.org/abs/1210.5033


in2p3-00743447, version 1
http://hal.in2p3.fr/in2p3-00743447
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From: Sylvie Florès <>
Submitted on: Friday, 19 October 2012 07:49:11
Updated on: Monday, 11 February 2013 15:42:36