Theoretical update of pseudoscalar meson distribution amplitudes of higher twist: the nonsinglet case

被引：360

作者：

Ball, P ^{[1
]}

机构：

[1] CERN TH, CH-1211 Geneva 23, Switzerland

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 1999年 / 01期

关键词：

nonperturbative effects; QCD;

D O I：

10.1088/1126-6708/1999/01/010

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 discuss the two and three particle light-cone distribution amplitudes (DAs) of pseudoscalar nonsinglet mesons of twist 3 and 4. Using nonlocal operator identities and conformal expansion, we derive closed expressions for several DAs. We also include meson-mass corrections which prove to be dominant in the twist 4 DAs of K and eta mesons. Explicit parametrizations for the DAs of pi, K and eta mesons are given, with the numerical input parameters determined from QCD sum rules.

引用

页码：XX / 19

页数：20

共 38 条

[1] HOW MUCH CAN BE LEARNT ABOUT PION WAVE-FUNCTION FROM THE DRELL-YAN PROCESS [J].