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FCNC-induced semileptonic decays of J/psi in the standard model
Wang YM(王玉明); Zou H(邹浩); Lv CD(吕才典); Wang, YM; Zou, H; Wei, ZT; Li, XQ; Lu, CD
2009
发表期刊JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
卷号36期号:10页码:105002
通讯作者[Wang, Yu-Ming ; Zou, Hao ; Lue, Cai-Dian] Chinese Acad Sci, Inst High Energy Phys & Theoret Phys, Ctr Sci Facil, Beijing 100049, Peoples R China ; [Wei, Zheng-Tao ; Li, Xue-Qian] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China
文章类型Article
摘要It is interesting to investigate the weak decays, especially the modes induced by the flavor-changing-neutral currents (FCNC), of a heavy quarkonium in the framework of QCD, because it may provide hints to new mechanisms and/or new physics beyond the standard model (SM). In this work, we calculate the form factors for J/psi -> (D) over bar (()*()0) induced by the FCNC in terms of the QCD sum rules. Making use of these form factors, we further calculate the branching fractions of semileptonic decays, J/psi -> (D) over bar (()*()0)l(+)l(-) (l = e, mu). Our results explicitly expose that the ratio of branching fractions for the channels induced by respectively the weak charged current and FCNC in the J/psi decays is significantly different from that in the case of flavored mesons (D or B), so one may expect to get a better understanding of the non-perturtbative effects in hadronic transitions. Even though such branching ratios are very tiny and beyond the reach of any available facility, because of its importance, it is worth experimental exploration, and we lay hope on the future improvements of facilities of high-energy physics and techniques. Moreover, if such decay modes were observed at the BES III with present luminosity and detection precision, it would be a clear signal for new physics beyond the SM.
学科领域Physics
DOI10.1088/0954-3899/36/10/105002
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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:000270241600009
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240915
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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Wang YM,Zou H,Lv CD,et al. FCNC-induced semileptonic decays of J/psi in the standard model[J]. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,2009,36(10):105002.
APA 王玉明.,邹浩.,吕才典.,Wang, YM.,Zou, H.,...&Lu, CD.(2009).FCNC-induced semileptonic decays of J/psi in the standard model.JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,36(10),105002.
MLA 王玉明,et al."FCNC-induced semileptonic decays of J/psi in the standard model".JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS 36.10(2009):105002.
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