TOWARDS THREE-LOOP QCD CORRECTIONS TO THE TIME-LIKE SPLITTING FUNCTIONS

被引：9

作者：

Gituliar, O. ^{[1
]}

Moch, S. ^{[2
]}

机构：

[1] Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[2] Univ Hamburg, Inst Theoret Phys 2, D-22761 Hamburg, Germany

来源：

ACTA PHYSICA POLONICA B | 2015年 / 46卷 / 07期

关键词：

INELASTIC EP SCATTERING; LEADING ORDER EVOLUTION; FRAGMENTATION FUNCTIONS; ANNIHILATION;

D O I：

10.5506/APhysPolB.46.1279

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the status of a direct computation of the time-like splitting functions at next-to-next-to-leading order in QCD. Time-like splitting functions govern the collinear kinematics of inclusive hadron production and the evolution of the parton fragmentation distributions. Current knowledge about them at three loops has been inferred by means of crossing symmetry from their related space-like counterparts, which has left certain parts of the off-diagonal quark-gluon splitting function undetermined. This motivates an independent calculation from first principles. We review the tools and methods which are applied to attack the problem.

引用

页码：1279 / 1289

页数：11

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