Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule
文献类型：期刊论文
| 作者 | Ma, WX; Li, XG; Lu, DH; Thomas, AW |
| 刊名 | HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
 |
| 出版日期 | 1999-09-01 |
| 卷号 | 23期号:9页码:880-889 |
| 关键词 | GDH sun rule photon absorption cross sections baryon resonance |
| ISSN号 | 0254-3052 |
| 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. |
| WOS关键词 | RESONANCE REGION ; PHOTOPRODUCTION ; SCATTERING ; PROTON |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000083108500007 |
| 出版者 | SCIENCE PRESS |
| 公开日期 | 2011-08-26 |
| 源URL | [http://ir.imp.cas.cn/handle/113462/9827]  |
| 专题 | 近代物理研究所_近代物理研究所知识存储（2010之前） |
| 通讯作者 | Ma, WX |
| 作者单位 | 1.Univ Adelaide, Special Res Ctr Subatom Struct Matter, Adelaide, SA 5005, Australia 2.Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China 3.Natl Lab Heavy Ion Collis, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China 4.Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia 5.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, WX,Li, XG,Lu, DH,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 | 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 | Ma, WX,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. |
入库方式： OAI收割
来源：近代物理研究所
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