Q(2)-dependence of the Gerasimov-Drell-Hearn sum rule
文献类型：期刊论文
| 作者 | Ma WX(马维兴); Ma, WX; Lu, DH; Thomas, AW; Li, ZP
|
| 刊名 | NUCLEAR PHYSICS A
 |
| 出版日期 | 1998 |
| 卷号 | 635期号:4页码:497-508 |
| 关键词 | GDH sum rule helicity amplitude constituent quark model |
| 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 |
| 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) 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. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Nuclear |
| 研究领域[WOS] | Physics |
| 原文出处 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000074520100006 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/237721]  |
| 专题 | 高能物理研究所_理论物理室 高能物理研究所_加速器中心 |
| 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,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. |
入库方式： OAI收割
来源：高能物理研究所
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