FORM-FACTORS OF EXCITED BARYONS AT HIGH Q2 AND THE TRANSITION TO PERTURBATIVE QCD .2.

被引：47

作者：

STOLER, P

机构：

[1] Physics Department, Rensselaer Polytechnic Institute, Troy

来源：

PHYSICAL REVIEW D | 1991年 / 44卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.44.73

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Transition form factors have been extracted from available electron scattering data in the Q2 range 1-21 GeV2/c2 for the first, second, and third resonances at W = 1232, 1535, and 1680 MeV. The transition form factors for the second and third resonances appear to approach a Q-4 dependence expected from leading-order perturbative QCD. However, the DELTA(1232) transition form factor decreases faster than Q-4, which would be expected if the leading helicity-1/2 amplitude is suppressed, and nonleading processes are dominant.

引用

页码：73 / 80

页数：8

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