On two-body decays of a scalar glueball
文献类型：期刊论文
| 作者 | Chao, K. T.; He, Xiao-Gang; Ma, J. P. ; Chao, KT , Peking Univ, Dept Phys, Beijing 100871, Peoples R China
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| 刊名 | EUROPEAN PHYSICAL JOURNAL C
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| 出版日期 | 2008 |
| 卷号 | 55期号:3页码:417-421 |
| 关键词 | Qcd Factorization Particle Physics Spectrum Lattice |
| ISSN号 | 1434-6044 |
| 英文摘要 | We study two-body decays of a scalar glueball. We show that in QCD a spin-0 pure glueball (a state with only gluons) cannot decay into a pair of light quarks if chiral symmetry holds exactly, i.e., the decay amplitude is chirally suppressed. However, this chiral suppression does not materialize itself at the hadron level such as in decays into pi(+)pi(-) and K+K-. We show this explicitly in the two cases with the glueball much lighter and much heavier than the QCD scale using low-energy theorems and perturbative QCD. For a heavy glueball, using QCD factorization based on an effective Lagrangian, we find that the hadronization into pi pi and KK leads to a large difference between Br(pi(+)pi(-)) and Br(K+K-); even the decay amplitude is not chirally suppressed. Our results can provide some understanding of the partonic contents if Br(pi pi) or Br(K (K) over bar) is measured reliably. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000256325100007 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5525]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Chao, KT , Peking Univ, Dept Phys, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chao, K. T.,He, Xiao-Gang,Ma, J. P.,et al. On two-body decays of a scalar glueball[J]. EUROPEAN PHYSICAL JOURNAL C,2008,55(3):417-421. |
| APA | Chao, K. T.,He, Xiao-Gang,Ma, J. P.,&Chao, KT , Peking Univ, Dept Phys, Beijing 100871, Peoples R China.(2008).On two-body decays of a scalar glueball.EUROPEAN PHYSICAL JOURNAL C,55(3),417-421. |
| MLA | Chao, K. T.,et al."On two-body decays of a scalar glueball".EUROPEAN PHYSICAL JOURNAL C 55.3(2008):417-421. |
入库方式： OAI收割
来源：理论物理研究所
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