Charm production asymmetries from heavy-quark recombination

Details Charm production asymmetries from heavy-quark recombination Charm production asymmetries from heavy-quark recombination

2003-06-19

arxiv.org/abs/hep-ph/0306178v1

AIP Conf.Proc. 698 (2004) 508-512

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, LaTeX, 8 figures, talk given at Strange Quark Matter 2003 Conference, Atlantic Beach, North Carolina, Mar 12-17, to

Scientific paper

10.1063/1.1664288

Charm asymmetries in fixed-target hadroproduction experiments are sensitive to power corrections to the QCD factorization theorem for heavy quark production. A power correction called heavy-quark recombination has recently been proposed to explain these asymmetries. In heavy-quark recombination, a light quark or antiquark participates in a hard scattering which produces a charm-anticharm quark pair. The light quark or antiquark emerges from the scattering with small momentum in the rest frame of the charm quark, and together they hadronize into a charm particle. The cross section for this process can be calculated within perturbative QCD up to an overall normalization. Heavy-quark recombination explains the observed D meson and \Lambda_c asymmetries with a minimal set of universal nonperturbative parameters.

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