Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule

	Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule
	Ma WX(马维兴); Ma, WX; Li, XG; Lu, DH; Thomas, AW
刊名	HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
	1999
卷号	23 期号:9 页码:880-889
关键词	GDH sun rule photon absorption cross sections baryon resonance
通讯作者	Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China ; Natl Lab Heavy Ion Collis, Ctr Theoret Nucl Phys, Lanzhou 730000, 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 ; Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
英文摘要	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) excitation largely saturates the sum rule at Q(2) = 0, and dominates at small Q(2). The GDH integral has a strong Q(2)-dependence below Q(2) = 1.0GeV(2) and changes its sign around Q(2) = 0.3GeV(2). It becomes weakly Q2-dependence for Q(2) > 1.0GeV(2) because of the quick decline of resonance contributions.
学科主题	Physics
类目[WOS]	Physics, Nuclear ; Physics, Particles & Fields
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:000083108500007
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/238669]
专题	高能物理研究所_理论物理室
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Ma WX,Ma, WX,Li, XG,et al. Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule[J]. HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,1999,23(9):880-889.
APA	马维兴,Ma, WX,Li, XG,Lu, DH,&Thomas, AW.(1999).Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule.HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,23(9),880-889.
MLA	马维兴,et al."Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule".HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION 23.9(1999):880-889.