Effects of The Initial Hadron in $B\to J/ψ+X$

Details Effects of The Initial Hadron in $B\to J/ψ+X$ Effects of The Initial Hadron in $B\to J/ψ+X$

2000-06-07

arxiv.org/abs/hep-ph/0006060v2

Phys.Lett. B488 (2000) 55-62

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 Pages, Latex, minor changes in the text and of notations

Scientific paper

10.1016/S0370-2693(00)00845-5

In the framework of HQET inclusive decays of b-flavored hadrons can be handled as decays of the free b-quark approximately. We analyse the correction to this approximation for the inclusive decays into a polarized $J/\psi$,the correction is characterized by two matrix elements defined in HQET. For the $J/\psi$ we use NRQCD to parameterize the formation of the $c\bar c$ pair into $J/\psi$. Numerically the correction is remarkably large, it can be at the level of 30% and it is mainly due to the Fermi-motion of the $b$-quark. With this correction we give a new determination for combinations of two NRQCD matrix elements.

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