SMALL MOMENTUM EVOLUTION OF THE EXTENDED DRELL-HEARN-GERASIMOV SUM-RULE

被引：40

作者：

BERNARD, V

KAISER, N

MEISSNER, UG

机构：

[1] UNIV LOUIS PASTEUR,F-67037 STRASBOURG 2,FRANCE

[2] TECH UNIV MUNICH,DEPT PHYS T30,W-8046 GARCHING,GERMANY

[3] UNIV BERN,INST THEORET PHYS,CH-3012 BERN,SWITZERLAND

来源：

PHYSICAL REVIEW D | 1993年 / 48卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.48.3062

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the momentum dependence of the extended Drell-Hearn-Gerasimov (DHG) sum rule. An economical formalism is developed which allows one to express the extended DHG sum rule in terms of a single virtual Compton amplitude in the forward direction. Rigorous results for the small momentum evolution are-derived from chiral perturbation theory within the one-loop approximation. Furthermore, we evaluate some higher-order contributions arising from DELTA(1232) intermediate states and relativistic corrections. We also discuss the limitations of our approach.

引用

页码：3062 / 3069

页数：8

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