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J/psi inclusive production in chi(bJ)(nP) decays
Li, R; He ZG(何志国); He, ZG
2010
发表期刊CHINESE PHYSICS C
卷号34期号:7页码:929-936
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
文章类型Article
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.
关键词NRQCD heavy quarkonium inclusive decay
学科领域Physics
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语种英语
WOS研究方向Physics
WOS类目Physics, Nuclear ; Physics, Particles & Fields
WOS记录号WOS:000279462900001
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/238759
专题理论物理室
作者单位中国科学院高能物理研究所
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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.
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