Abstract
Model-independent bounds are presented for the form-factors describing the semileptonic decay Λb→Λceνe at the end-point of the lepton energy spectrum. For the axial-vector form-factor f{hook}1A(1) we obtain f{hook}1A(1)≤0.960/0.935, where the uncertainty arises from the value of μπ2, the average kinetic energy of the b quark inside the Λb baryon. A bound is given on the forward matrix element of the axial current in a Λb baryon which is relevant for the inclusive semileptonic decays of the polarized Λb decays.
Original language | English |
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Pages (from-to) | 399-404 |
Number of pages | 6 |
Journal | Physics Letters B |
Volume | 334 |
Issue number | 3-4 |
DOIs | |
State | Published - 18 Aug 1994 |