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On the 1/m^2 corrections to the form-factors in /\_b -> /\_c semileptonic decays

J. G. Korner·D. Pirjol
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Abstract

Model-independent bounds are presented for the form-factors describing the semileptonic decay $Λ_b\toΛ_ce\barν_e$ at the end-point of the lepton energy spectrum. For the axial-vector form-factor $f_1^A(1)$ we obtain $f_1^A(1)\leq 0.960÷0.935$, where the uncertainty arises from the value of $μ_π^2$, the average kinetic energy of the $b$ quark inside of the $Λ_b$ baryon. A bound is given on the forward matrix element of the axial current in a $Λ_b$ baryon which is relevant for the inclusive semileptonic decays of the polarized $Λ_b$ decays.

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J. G. Korner, D. Pirjol. 1994-05-23. On the 1/m^2 corrections to the form-factors in /\_b -> /\_c semileptonic decays. https://doi.org/10.1016/0370-2693(94)90705-6

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