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Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule
Ma WX(马维兴); Ma, WX; Lu, DH; Thomas, AW; Li, ZP
1998
发表期刊NUCLEAR PHYSICS A
卷号635期号:4页码:497-508
通讯作者Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China ; Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia ; Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia ; Beijing Univ, Dept Phys, Beijing 100871, Peoples R China
文章类型Article
摘要We test the Gerasimov-Drell-Hearn (GDH) sum rule numerically by calculating the total photon absorption cross sections sigma(1/2) and sigma(3/2) on the nucleon via photon excitation of baryon resonances in the constituent quark model. A total of seventeen, low-lying, non-strange baryon resonances are included in this calculation. The transverse and longitudinal interference cross section, sigma(1/2)(TL), is found to play an important role in the study of the Q(2) variation of the sum rule. The results show that the GDH sum rule is saturated by these resonances at a confidence level of 94%. In particular, the P-33(1232) dominates at small Q(2), The GDH integral has a strong Q(2)-dependence below Q(2) = 1.0 GeV2 and changes its sign around Q(2) = 0.3 GeV2. It becomes weakly Q(2)-dependent for Q(2) > 1.0 GeV2 because of the quick decline of the resonance contributions. (C) 1998 Published by Elsevier Science B.V.
关键词GDH sum rule helicity amplitude constituent quark model
学科领域Physics
研究领域[WOS]Physics ; Physics
DOI10.1016/S0375-9474(98)00202-4
URL查看原文
语种英语
研究领域[WOS]Physics ; Physics
WOS类目Physics, Nuclear
WOS记录号WOS:000074520100006
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被引频次:12[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/237721
专题理论物理室
作者单位中国科学院高能物理研究所
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Ma WX,Ma, WX,Lu, DH,et al. Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule[J]. NUCLEAR PHYSICS A,1998,635(4):497-508.
APA 马维兴,Ma, WX,Lu, DH,Thomas, AW,&Li, ZP.(1998).Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule.NUCLEAR PHYSICS A,635(4),497-508.
MLA 马维兴,et al."Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule".NUCLEAR PHYSICS A 635.4(1998):497-508.
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