We study the B meson radiative decay B→Xsγ in the vector quark model. Deviation from the standard model arises from the nonunitarity of the charged current Kobayashi-Maskawa matrix and related new flavor changing neutral current interactions. We establish the relation between the nonunitarity of the charged current mixing matrix and the mixing among the vector quark and ordinary quarks. We also explicitly make the close connection between this nonunitarity and the flavor changing neutral currents. The complete calculation including the leading logarithmic QCD correction is carefully carried out. Using the most updated data and the next to leading order theoretical calculation, the branching fraction of the observed B meson radiative decay places a limit on the mixing angles as stringent as that from the process B→Xμμ̄.
|Number of pages
|Physical Review D - Particles, Fields, Gravitation and Cosmology
|Published - 2000 Mar 1
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)