Transverse momentum dependence in the perturbative calculation of the pion form factor

被引：4
|
作者：
Cao, FG
Huang, T
机构：
[1] CCAST, World Lab, Beijing 100080, Peoples R China
[2] Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China
[3] Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
来源：
MODERN PHYSICS LETTERS A | 1998年 / 13卷 / 04期
关键词：
D O I：
10.1142/S0217732398000310
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Transverse momentum dependence in the perturbative calculation of the pion electromagnetic form factor is re-analyzed. It is found that (a) the intrinsic transverse momentum dependence associated with the pion wave function significantly suppresses perturbative prediction for the pion form factor at the energy region of a few GeV, and (b) the transverse momentum dependence in the fermion propagator of the hard scattering leads to a mild reduction of the perturbative calculation. Our formalism is available for both the intermediate energy region (Q similar to a few GeV) and the asymptotic energy region (Q --> asymptotic to).
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页码：253 / 262
页数：10
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