The Leading Particle Effect from Heavy-Quark Recombination

Details The Leading Particle Effect from Heavy-Quark Recombination The Leading Particle Effect from Heavy-Quark Recombination

2002-05-14

arxiv.org/abs/hep-ph/0205149v1

Phys.Rev.Lett. 89 (2002) 122002

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revtex file, 4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.89.122002

The leading particle effect in charm hadroproduction is an enhancement of the cross section for a charmed hadron D in the forward direction of the beam when the beam hadron has a valence parton in common with the D. The large D+/D- asymmetry observed by the E791 experiment is an example of this phenomenon. We show that the heavy-quark recombination mechanism provides an economical explanation for this effect. In particular, the D+/D- asymmetry can be fit reasonably well using a single parameter whose value is consistent with a recent determination from charm photoproduction.

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