Leading-particle effect from heavy-quark recombination

被引：73

作者：

Braaten, E

Jia, Y

Mehen, T

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[2] Duke Univ, Dept Phys, Durham, NC 27708 USA

[3] Jefferson Lab, Newport News, VA 23606 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.89.122002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 largeD(+) /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.

引用

页数：4

共 30 条

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