Charm production asymmetries from heavy-quark recombination
Abstract
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 Lgrc asymmetries with a minimal set of universal nonperturbative parameters.
- Publication:
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Journal of Physics G Nuclear Physics
- Pub Date:
- January 2004
- DOI:
- 10.1088/0954-3899/30/1/035
- Bibcode:
- 2004JPhG...30S.295M