Distribution of valence quarks and light-cone QCD sum rules

被引：13

作者：

Belyaev, VM ^{[1
]}

Johnson, MB ^{[1
]}

机构：

[1] LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545

来源：

PHYSICAL REVIEW D | 1997年 / 56卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.56.1481

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A method for calculating the pion structure function directly in terms of light-cone wave functions is suggested. Taking twist-two and twist-four pion light-cone wave functions into account, it is shown that the QCD sum rule prediction is in agreement with the quark distribution obtained from an analysis of the Drell-Yan process. Twist-four quark-gluon light-cone wave functions give a large positive contribution to the pion structure function for x(B) < 0.2. A new constraint on the twist-two pion light-cone wave function is obtained. We argue that the leading twist pion wave function phi(pi)(u) similar or equal to 1 for u = 0.3 with an accuracy of about 20-30 %.

引用

页码：1481 / 1488

页数：8

共 45 条

[1] ESTIMATES OF THE WEAK ANNIHILATION CONTRIBUTIONS TO THE DECAYS B-]RHO+GAMMA AND B-]OMEGA+GAMMA [J].