Unification of the kT and threshold resummations

被引：62

作者：

Li, HN ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

来源：

PHYSICS LETTERS B | 1999年 / 454卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(99)00350-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We derive a resummation formula for a k(T)-dependent parton distribution function at threshold, where k(T) is a parton transverse momentum. The derivation requires infrared cutoffs for both longitudinal and transverse loop moments as evaluating soft gluon emissions in the Collins-Soper resummation framework. This unified resummation exhibits suppression at large b, b being the conjugate variable of k(T), which is similar to the k(T) resummation, and exhibits enhancement at small b, similar to the threshold resummation. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：328 / 334

页数：7

共 12 条

[1] HARD ELASTIC-SCATTERING IN QCD - LEADING BEHAVIOR [J].

BOTTS, J ;

STERMAN, G .

NUCLEAR PHYSICS B, 1989, 325 (01) :62-100

[2] BACK-TO-BACK JETS IN QCD [J].

COLLINS, JC ;

SOPER, DE .

NUCLEAR PHYSICS B, 1981, 193 (02) :381-443

[3] GLOBAL QCD STUDY OF DIRECT PHOTON PRODUCTION [J].

HUSTON, J ;

KOVACS, E ;

KUHLMANN, S ;

LAI, HL ;

OWENS, JF ;

TUNG, WK .

PHYSICAL REVIEW D, 1995, 51 (11) :6139-6145

[4]

KIDONAKIS N, HEPPH9801268

[5]

LAENEN E, HEPPH9806467

[6]

LAI HL, IN PRESS PHYS REV D

[7] Resummation at large Q and at small x [J].

Li, HN .

PHYSICS LETTERS B, 1997, 405 (3-4) :347-354

[8] Resummation in hard QCD processes [J].

Li, HN .

PHYSICAL REVIEW D, 1997, 55 (01) :105-119

[9] Resummation of large corrections in inclusive B meson decays [J].

Li, HN .

PHYSICS LETTERS B, 1996, 369 (02) :137-143

[10] THE PERTURBATIVE PION FORM-FACTOR WITH SUDAKOV SUPPRESSION [J].

LI, HN ;

STERMAN, G .

NUCLEAR PHYSICS B, 1992, 381 (1-2) :129-140

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