Type of Document	Dissertation
Author	Stavreva, Tzvetalina P
URN	etd-04102009-155714
Title	Direct Photon Production In Association With A Heavy Quark
Degree	Doctor of Philosophy
Department	Physics, Department of
Advisory Committee	Advisor Name Title Joseph F. Owens III Committee Chair Horst Wahl Committee Member Laura Reina Committee Member Marcia Fenley Committee Member William Dewar Outside Committee Member
Keywords	Cross Section Heavy Quark Photon QCD Collider Physics
Date of Defense	2009-04-03
Availability	unrestricted
Abstract In this Thesis we present the Next-To-Leading-Order calculation, O(alpha alpha_s^2), of the inclusive cross section for a photon and a heavy quark (charm or bottom), p bar p / pp -> gamma +Q +X, (Q=c,b) at hadron colliders. We include fragmentation effects through the Next-To-Leading-Order. This calculation is performed with the use of a phase space slicing technique so that the effects of experimental cuts can be easily included. We study in detail the characteristics of this process at both the Tevatron and the LHC. Results for the ratios of the charm and bottom cross sections are presented and the systematics of the various subprocesses are compared and contrasted. The theory predictions are compared to experimental measurements from the DO collaboration at Fermilab. A brief overview of the LO massive calculation is also presented, and compared to the NLO massless case. We predict that the investigation of this process and our results will be relevant in the study of heavy quark PDFs at the LHC.
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