The rare decays $B\to X_{s,d}\nu \bar{\nu }$ and $B_{s,d}\to l^{+}{l}^{-}$ in the Multiscale Walking Technicolor Model

Abstract

We calculate the contributions to the rare B-decays, $B\to X_{s,d}\nu \bar{\nu }$, $B_{s,d}\to l^{+}{l}^{-}$ from the unit-charged technipions. Within the considered parameter space we find that: (a) the enhancements to the branching ratios in question can be as large as three orders of magnitude; (b) the ALEPH data of $B\to X_s\nu \bar{\nu }$ lead to strong mass bounds on $m_{p1}$ and $m_{p8}$: $m_{p8}\ge 620,475GeV$ for $F_Q=40GeV$ and $m_{p1}=100,400GeV$ respectively. (c) the CDF data of $B_s\to \mu \bar{\mu }$ lead to a relatively weak limit: $m_{p8}\ge 320GeV$ for $F_Q=40GeV$ and $m_{p1}=200GeV$.

Comments: Latex file, 6 pages with 2 ps figures