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Rare decays of Lambda(b) -> Lambda plus gamma and Lambda(b) -> Lambda plus l(+)l(-) in the light-cone sum rules
Wang YM(王玉明); Lv CD(吕才典); Wang, YM; Li, Y; Lu, CD
2009
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号59期号:4页码:861-882
通讯作者[Wang, Yu-Ming ; Lu, Cai-Dian] CAS, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Wang, Yu-Ming ; Lu, Cai-Dian] CAS, Sci Facil, Ctr Theoret Phys, Beijing 100049, Peoples R China ; [Li, Ying] Yantai Univ, Dept Phys, Yantai 264005, Peoples R China
文章类型Review
摘要The weak decays of Lambda(b) -> Lambda + gamma and Lambda(b) -> Lambda + l(+)l(-) are investigated in the standard model using the light-cone sum-rule approach. The higher-twist distribution amplitudes of the Lambda baryon to the leading conformal spin are included in the sum rules for the transition form factors. Our results indicate that the higher-twist distribution amplitudes almost have no influence on the transition form factor f(2)(q(2)) defined by the tensor current, while such corrections can have a significant impact on the form factors g2(q(2)) defined by a vector current. Two phenomenological models (COZ and FZOZ) for the wave function of the. baryon are also employed in the sum rules for comparison, which can give rise to form factors approximately five times larger than that in terms of conformal expansion. Utilizing the form factors calculated in LCSR, the physical observables like the decay rate, the polarization asymmetry and forward-backward asymmetry are analyzed for the decays of Lambda(b) -> Lambda gamma, Lambda l(+)l(-).
学科领域Physics
研究领域[WOS]Physics ; Physics
DOI10.1140/epjc/s10052-008-0846-5
URL查看原文
语种英语
研究领域[WOS]Physics ; Physics
WOS类目Physics, Particles & Fields
WOS记录号WOS:000263508500011
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被引频次:44[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/238627
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
Wang YM,Lv CD,Wang, YM,et al. Rare decays of Lambda(b) -> Lambda plus gamma and Lambda(b) -> Lambda plus l(+)l(-) in the light-cone sum rules[J]. EUROPEAN PHYSICAL JOURNAL C,2009,59(4):861-882.
APA 王玉明,吕才典,Wang, YM,Li, Y,&Lu, CD.(2009).Rare decays of Lambda(b) -> Lambda plus gamma and Lambda(b) -> Lambda plus l(+)l(-) in the light-cone sum rules.EUROPEAN PHYSICAL JOURNAL C,59(4),861-882.
MLA 王玉明,et al."Rare decays of Lambda(b) -> Lambda plus gamma and Lambda(b) -> Lambda plus l(+)l(-) in the light-cone sum rules".EUROPEAN PHYSICAL JOURNAL C 59.4(2009):861-882.
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