Leading charm in hadron-nucleus interactions in the intrinsic charm model

被引：33

作者：

Gutierrez, T ^{[1
]}

Vogt, R

机构：

[1] Univ Calif Davis, Dept Phys, Livermore, CA 95616 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA

来源：

NUCLEAR PHYSICS B | 1999年 / 539卷 / 1-2期

关键词：

D O I：

10.1016/S0550-3213(98)00748-2

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Leading charm hadrons produced in hadron-nucleus interactions cannot be adequately described within the parton fusion model. Recent results on charm baryon production in Sigma(-)A interactions at 330 GeV with the WA89 detector disagree with fusion predictions. Intrinsic heavy quark pairs in the Sigma(-)(dds) wavefunction provide a simple mechanism for producing fast charm hadrons, We calculate leading charm baryon production from Sigma(-), pi(-) and p projectiles in a two component model combining parton fusion with intrinsic charm. Final state D-, Sigma(c)(0), Xi(c)(+), and Lambda(c)(+) d sigma/dx(F) distributions and D-/D+, D-s(-)/D-s(+) and Lambda(c)(+)/<(lambda)over bar>(+)(c) asymmetries are compared to WA89 data. Predictions are made for 650 GeV Sigma(-)A and pi(-)A interactions in the SELEX detector at Fermilab and for 800 GeV pA interactions. (C) 1999 Elsevier Science B.V.

引用

页码：189 / 214

页数：26

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