WHAT DO WE KNOW ABOUT THE Q-2 EVOLUTION OF THE GERASIMOV-DRELL-HEARN SUM-RULE

被引：124

作者：

BURKERT, V ^{[1
]}

LI, ZJ ^{[1
]}

机构：

[1] VIRGINIA POLYTECH INST & STATE UNIV,DEPT PHYS,BLACKSBURG,VA 24601

来源：

PHYSICAL REVIEW D | 1993年 / 47卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.47.46

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study contributions from baryon resonance excitations to the Q2 dependence of the Gerasimov-Drell-Hearn sum rule. The results indicate that the sum rule at small Q2 is largely saturated by contributions from the lower mass resonant states. We find a strong Q2 dependence of the resonant contributions, leading even to a sign change of the sum rule integral at Q2 congruent-to 0.8 GeV2. The global Q2 dependence indicates discrepancies to the interpretation of the European Muon Collaboration polarized structure function data on A1p in the resonance region.

引用

页码：46 / 50

页数：5

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