NEUTRON FORM-FACTOR - SUDAKOV SUPPRESSION AND INTRINSIC TRANSVERSE SIZE EFFECT

被引：11

作者：

BOLZ, J ^{[1
]}

JAKOB, R ^{[1
]}

KROLL, P ^{[1
]}

BERGMANN, M ^{[1
]}

STEFANIS, NG ^{[1
]}

机构：

[1] RUHR UNIV BOCHUM,INST THEORET PHYS 2,D-44780 BOCHUM,GERMANY

来源：

PHYSICS LETTERS B | 1995年 / 342卷 / 1-4期

关键词：

D O I：

10.1016/0370-2693(94)01379-Q

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Two recently proposed concepts to improve the perturbative calculation of exclusive amplitudes, gluonic radiative corrections (Sudakov factor) and confinement size effects (intrinsic transverse momentum) are combined to study the neutron magnetic form factor in the space-like region. We fmd that nucleon distribution amplitudes modelled on the basis of current QCD sum rules indicate overlap with the existing data for sigma(n)/sigma(p) at the highest measured values of momentum transfer. However, sizeable higher-order perturbative corrections (K-factor) and/or higher-twist contributions cannot be excluded.

引用

页码：345 / 350

页数：6

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