Semileptonic decays of heavy baryons in the relativistic quark model

Details Semileptonic decays of heavy baryons in the relativistic quark model Semileptonic decays of heavy baryons in the relativistic quark model

2006-04-03

arxiv.org/abs/hep-ph/0604017v1

Phys.Rev. D73 (2006) 094002

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 9 figures

Scientific paper

10.1103/PhysRevD.73.094002

Semileptonic decays of heavy baryons consisting of one heavy (Q=b,c) and two light (q=u,d,s) quarks are considered in the heavy-quark--light-diquark approximation. The relativistic quasipotential equation is used for obtaining masses and wave functions of both diquarks and baryons within the constituent quark model. The weak transition matrix elements are expressed through the overlap integrals of the baryon wave functions. The Isgur-Wise functions are determined in the whole accessible kinematic range. The exclusive semileptonic decay rates and different asymmetries are calculated with applying the heavy quark 1/m_Q expansion. The evaluated Lambda_b -> Lambda_c l nu decay rate agrees with its experimental value.

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