Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-10-18
J.Phys.G28:983-996,2002
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, 10 figures, Proceedings of Ringberg Workshop: New Trends in HERA Physics 2001, Munich, Germany
Scientific paper
10.1088/0954-3899/28/5/321
Heavy flavor production is an important QCD process both in its own right and as a key component of precision global QCD analysis. Apparent disagreements between fixed-flavor scheme calculations of b-production rate with experimental measurements in hadro-, lepto-, and photo-production provide new impetus to a thorough examination of the theory and phenomenology of this process. We review existing methods of calculation, and place them in the context of the general PQCD framework of Collins. A distinction is drawn between scheme dependence and implementation issues related to quark mass effects near threshold. We point out a so far overlooked kinematic constraint on the threshold behavior, which greatly simplifies the variable flavor number scheme. It obviates the need for the elaborate existing prescriptions, and leads to robust predictions. It can facilitate the study of current issues on heavy flavor production as well as precision global QCD analysis.
Kretzer Stefan
Schmidt Carl
Tung W.-K.
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