Calculation of the semileptonic decay width of the $\Lambda_b$ baryonCalculation of the semileptonic decay width of the $\Lambda_b$ baryon

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 Author Jin, Changhao Source arXiv.org Content type Text File Format PDF Date of Submission 1997-09-25 Language English
 Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Physics Subject Keyword High Energy Physics - Phenomenology ♦ physics:hep-ph Abstract We extend the approach based on the light-cone expansion and the heavy quark effective theory to the inclusive semileptonic decay of an unpolarized $b$-flavored hadron. It is applied to calculate the semileptonic decay width of the $\Lambda_b$ baryon and its ratio to that of the B meson. We obtain $\Gamma_{SL}(\Lambda_b)= 51\pm 9 V_{cb} ^2{ps}^{-1}$ and $\Gamma_{SL}(\Lambda_b)/\Gamma_{SL}(B)= 1.052\pm 0.006$. From the latter, the semileptonic branching fraction for $\Lambda_b$ is predicted to be $(8.7\pm 0.7)%$. Description Reference: Phys.Rev. D56 (1997) 7267-7272 Educational Use Research Learning Resource Type Article Page Count 11