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Lambda b -> p, Lambda transition form factors from QCD light-cone sum rules
Wang YM(王玉明); Lv CD(吕才典); Wang, YM; Shen, YL; Lu, CD
2009
发表期刊PHYSICAL REVIEW D
卷号80期号:7页码:74012
通讯作者[Wang, Yu-Ming ; Lue, Cai-Dian] Inst High Energy Phys, Beijing 100049, Peoples R China ; [Wang, Yu-Ming ; Lue, Cai-Dian] Ctr Theoret Phys, Sci Facil, Beijing 100049, Peoples R China ; [Shen, Yue-Long] Acad Sinica, Inst Phys, Taipei 115, Taiwan ; [Shen, Yue-Long] Ocean Univ China, Coll Informat Sci & Engn, Qingdao 266100, Shandong, Peoples R China
文章类型Article
摘要Light-cone sum rules for the Lambda(b) -> p, Lambda transition form factors are derived from the correlation functions expanded by the twist of the distribution amplitudes of the Lambda(b) baryon. In terms of the Lambda(b) three-quark distribution amplitude models constrained by the QCD theory, we calculate the form factors at small momentum transfers and compare the results with those estimated in the conventional light-cone sum rules (LCSR) and perturbative QCD approaches. Our results indicate that the two different versions of sum rules can lead to the consistent numbers of form factors responsible for Lambda(b) -> p transition. The Lambda(b) -> Lambda transition form factors from LCSR with the asymptotic Lambda baryon distribution amplitudes are found to be almost 1 order larger than those obtained in the Lambda(b)-baryon LCSR, implying that the preasymptotic corrections to the baryonic distribution amplitudes are of great importance. Moreover, the SU(3) symmetry breaking effects between the form factors f(1)(Lambda b -> p) and f(1)(Lambda b ->Lambda) are computed as 28(-8)(+14)% in the framework of Lambda(b)-baryon LCSR.
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
DOI10.1103/PhysRevD.80.074012
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Physics ; Astronomy & Astrophysics ; Physics
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000271353400042
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被引频次:30[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/311005/240783
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. Lambda b -> p, Lambda transition form factors from QCD light-cone sum rules[J]. PHYSICAL REVIEW D,2009,80(7):74012.
APA 王玉明,吕才典,Wang, YM,Shen, YL,&Lu, CD.(2009).Lambda b -> p, Lambda transition form factors from QCD light-cone sum rules.PHYSICAL REVIEW D,80(7),74012.
MLA 王玉明,et al."Lambda b -> p, Lambda transition form factors from QCD light-cone sum rules".PHYSICAL REVIEW D 80.7(2009):74012.
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