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Exclusive decay of 1(--) quarkonia and B-c meson into a lepton pair combined with two pions
Ma, JP; Xu, JS; Ma, JP , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
2002
发表期刊EUROPEAN PHYSICAL JOURNAL C
ISSN1434-6044
卷号24期号:2页码:261-270
摘要We study the exclusive decay of J/psi, Y and B-c into a lepton pair combined with two pions in two kinematic regions. One is specified by the two pions having large momenta, but a small invariant mass. The other is specified by the two pions having small momenta. In both cases we find that in the heavy quark limit the decay amplitude takes a factorized form, in which the non-perturbative effect related to the heavy meson is represented by a NRQCD matrix element. The non-perturbative effects related to the two pions are represented by some universal functions characterizing the conversion of gluons into pions. Using models for these universal functions and chiral perturbative theory we are able to obtain numerical predictions for the decay widths. Our numerical results show that the decay of J/psi is of the order of 10(-5) with reasonable cuts and can be observed at BES II and the proposed BES III and CLEO-C. For other decays the branching ratio may be too small to be measured.
部门归属Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; China Ctr Adv Sci & Technol, World Lab, Beijing 100080, Peoples R China
关键词p(p)Over-bar Collisions Hadronic Transitions Heavy Quarkonium Root-s=1.8 Tev Qcd-analysis 2 Pions States
学科领域Physics
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收录类别SCI
WOS记录号WOS:000176937900007
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13507
专题理论物理所SCI论文
通讯作者Ma, JP , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
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Ma, JP,Xu, JS,Ma, JP , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.. Exclusive decay of 1(--) quarkonia and B-c meson into a lepton pair combined with two pions[J]. EUROPEAN PHYSICAL JOURNAL C,2002,24(2):261-270.
APA Ma, JP,Xu, JS,&Ma, JP , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(2002).Exclusive decay of 1(--) quarkonia and B-c meson into a lepton pair combined with two pions.EUROPEAN PHYSICAL JOURNAL C,24(2),261-270.
MLA Ma, JP,et al."Exclusive decay of 1(--) quarkonia and B-c meson into a lepton pair combined with two pions".EUROPEAN PHYSICAL JOURNAL C 24.2(2002):261-270.
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