HEAVY-QUARK FRAGMENTATION INTO HEAVY MESONS

被引：70

作者：

JAFFE, RL ^{[1
]}

RANDALL, L ^{[1
]}

机构：

[1] MIT,DEPT PHYS,CAMBRIDGE,MA 02139

来源：

NUCLEAR PHYSICS B | 1994年 / 412卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0550-3213(94)90495-2

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：

We present a QCD based interpretation of heavy quark fragmentation which utilizes the heavy quark mass expansion. By distinguishing between perturbative and non-perturbative QCD effects, we show how to reliably extract mass independent parameters characterizing the fragmentation function. Because these parameters are quark mass independent, this procedure should permit tests of heavy quark symmetry. Furthermore, we show that heavy quark mass corrections vanish at order m2/Q2 in QCD. There also exist higher-twist corrections of order Am/Q2 and (alpha(QCD)/pi)/(m2/Q2)ln(Q2/m2) which we relate to the leading twist fragmentation function.

引用

页码：79 / 105

页数：27

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