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The Leading Particle Effect from Heavy-Quark Recombination

Eric Braaten·Yu Jia·Thomas Mehen
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Abstract

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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Eric Braaten, Yu Jia, Thomas Mehen. 2002-05-14. The Leading Particle Effect from Heavy-Quark Recombination. https://doi.org/10.1103/physrevlett.89.122002

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