J/psi inclusive production in chi(bJ)(nP) decays
文献类型：期刊论文
| 作者 | Li, R ; He ZG(何志国); He, ZG
|
| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2010 |
| 卷号 | 34期号:7页码:929-936 |
| 关键词 | NRQCD heavy quarkonium inclusive decay |
| 通讯作者 | [Li Rong] Peking Univ, Dept Phys, Beijing 100871, Peoples R China ; [Li Rong] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China ; [He Zhi-Guo] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [He Zhi-Guo] CAS, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China |
| 英文摘要 | We study J/psi) inclusive production in the decays of P-wave bottomonium X-bJ(1P,2P) for J=0,1,2. Within the framework of the non-relativistic QCD (NRQCD) factorization method we calculate the contributions coming from four relevant processes including one color-singlet process and three color-octet ones, which are b (b) over bar(P-3(J),(1) under bar) -> c (c) over bar(S-3(1),(8) under bar) + c+(c) over bar, b (b) over bar(S-3(1),(8) under bar) -> c (c) over bar(S-3(1),(1) under bar) + g+ g, b (b) over bar(S-3(1),(8) under bar) -> c (c) over bar((3),S-1,(1) under bar) + g + g, (c) over bar and (S-3(1),(1) under bar) c + (c) over bar and b (b) over bar(S-3(1),(8) under bar) -> c (c) over bar(S-3(1),(8) under bar)+g. Our calculation shows that the color-octet processes, especially the gluon fragmentation one, contribute the most in the decays of chi(bo) and chi(bi). However, the J/psi production in the chi(b2) decay is dominated by the color-singlet process. Furthermore, the gluon fragmentation process gives a delta function in the energy fraction distribution of J/psi), which can be considered to be another characteristic for its identification. From our estimation the branching ratio for these processes is about 10(-4) -10(-5,) which indicates that J/psi inclusive production is detectable at B-factories. Studying these processes would help us to gain a deeper understanding of the color-octet mechanism. |
| 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:000279462900001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/238759]  |
| 专题 | 高能物理研究所_理论物理室 高能物理研究所_多学科研究中心 |
| 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 | Li, R,He ZG,He, ZG. J/psi inclusive production in chi(bJ)(nP) decays[J]. CHINESE PHYSICS C,2010,34(7):929-936. |
| APA | Li, R,何志国,&He, ZG.(2010).J/psi inclusive production in chi(bJ)(nP) decays.CHINESE PHYSICS C,34(7),929-936. |
| MLA | Li, R,et al."J/psi inclusive production in chi(bJ)(nP) decays".CHINESE PHYSICS C 34.7(2010):929-936. |
入库方式： OAI收割
来源：高能物理研究所
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