New results on the baryon decay Lambda(b) -> Lambda(c) l(nu)over-bar(l) in heavy quark effective theory
贾宇;Jia, Y; Jugeau, F; Oliver, L
刊名PHYSICAL REVIEW D
2012
卷号86期号:1页码:14002
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.86.014002
英文摘要The baryon differential spectrum of the baryon decay Lambda(b) -> Lambda(c) l (nu) over bar (l) will hopefully be measured in detail at LHCb. We obtain some new results on the form factors in the heavy quark expansion of Heavy Quark Effective Theory that can be useful in the interpretation of the data. We formulate a sum rule for the elastic subleading form factor A(w) at order 1/m(Q), that originates from the Lagrangian perturbation L-kin. In the sum rule appear only the intermediate states (j(P), j(P)) = (0(+,) 1/2(+)), entering also in the 1/m(Q)(2) correction to the axial form factor G(1)(w), that contributes to the differential rate at zero recoil w = 1. This result, together with another sum rule in the forward direction for vertical bar G(1)(1)vertical bar(2), allows to obtain a lower bound for the correction at zero recoil -delta((G1))(2)(1/m)(Q) in terms of the derivative A'(1) (1) and the slope rho(2)(Lambda) and curvature sigma(2)(Lambda) of the elastic Isgur-Wise function xi(Lambda) (w). Another theoretical implication is that A'(1) must vanish for some relation between rho(2)(Lambda) and sigma(2)(Lambda), as well as for rho(2)(Lambda) -> 0, establishing a nontrivial correlation between the leading IW function xi(Lambda) (w) and the subleading one A(w). A phenomenological estimation of these two functions allows to obtain a lower bound on -delta((G1))(2)(1/m)(Q)
收录类别SCI
WOS记录号WOS:000306192100003
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被引频次:2[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/311005/224485
专题中国科学院高能物理研究所_理论物理室_期刊论文
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贾宇;Jia, Y,Jugeau, F,Oliver, L. New results on the baryon decay Lambda(b) -> Lambda(c) l(nu)over-bar(l) in heavy quark effective theory[J]. PHYSICAL REVIEW D,2012,86(1):14002.
APA 贾宇;Jia, Y,Jugeau, F,&Oliver, L.(2012).New results on the baryon decay Lambda(b) -> Lambda(c) l(nu)over-bar(l) in heavy quark effective theory.PHYSICAL REVIEW D,86(1),14002.
MLA 贾宇;Jia, Y,et al."New results on the baryon decay Lambda(b) -> Lambda(c) l(nu)over-bar(l) in heavy quark effective theory".PHYSICAL REVIEW D 86.1(2012):14002.
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