Pionic parton distributions revisited

被引：214

作者：

Glück, M ^{[1
]}

Reya, E ^{[1
]}

Schienbein, I ^{[1
]}

机构：

[1] Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany

来源：

EUROPEAN PHYSICAL JOURNAL C | 1999年 / 10卷 / 02期

关键词：

D O I：

10.1007/s100529900124

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：

Using constituent quark model constraints we calculate the gluon and sea-quark content of pions solely in terms of their valence density (fixed by pi N Drell-Yan data) and the known sea and gluon distributions of the nucleon, using the most recent updated valence-like input parton densities of the nucleon. The resulting small-x dynamical QCD predictions for g(pi)(x, Q(2)) and (q) over bar pi(x, Q(2)) are unique and parameter free. Simple analytic parametrizations of the resulting parton distributions of the pion are presented in LO and NLO. These results and parametrizations will be important, among other things, for updated formulations of the parton distributions of real and virtual photons.

引用

页码：313 / 317

页数：5

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