Space- and time-like electromagnetic pion form factors in light-cone pQCD

被引：12
|
作者：
Chen, Jiunn-Wei [1 ,2 ]
Kohyama, Hiroaki [3 ,4 ]
Ohnishi, Kazuaki [1 ,2 ]
Raha, Udit [1 ,2 ]
Shen, Yue-Long [3 ]
机构：
[1] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan
[2] Natl Taiwan Univ, Ctr Theoret Sci, Taipei 10617, Taiwan
[3] Acad Sinica, Inst Phys, Taipei 115, Taiwan
[4] Natl Ctr Theoret Sci, Div Phys, Hsinchu 300, Taiwan
来源：
PHYSICS LETTERS B | 2010年 / 693卷 / 02期
关键词：
Perturbative QCD; Electromagnetic form factor; Distribution amplitude; Sudakov suppression; Higher twist; EXCLUSIVE PROCESSES; SUM-RULES; FACTORIZATION; QCD; ELECTROPRODUCTION; EVOLUTION;
D O I：
10.1016/j.physletb.2010.05.082
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a combined analysis of the space- and time-like electromagnetic pion form factors in light-cone perturbative QCD with transverse momentum dependence and Sudakov suppression. Including the genuine non-perturbative "soft" QCD and the power suppressed twist-3 corrections to the standard twist-2 perturbative QCD result, the experimental form factor data available at moderate energies/momentum transfers can be explained reasonably well. To this end, the bulk of the existing discrepancy between the space- and time-like experimental data is ostensibly reconciled. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：102 / 107
页数：6
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