Manifestaion of SUSY in B decays

Abstract

SUSY effects on various flavor changing neutral current processes are discussed in the minimal supergravity model and the SU(5) grand unified theory with right-handed neutrino supermultiplets. In particular, in the latter case the neutrino Yukawa coupling constants can be a source of the flavor mixing in the right-handed-down-type-squark sector. It is shown that due to this mixing the time-dependent CP asymmetry of radiative B decay can be as large as 30% and the ratio of $B_s$-${\bar{B}}_s$ mixing and $B_d$-${\bar{B}}_d$ mixing deviates from the prediction in the standard model and the minimal supergravity model without the neutrino interaction.

Comments: 7 pages, 2 figures, talk given at the Third International Conference on B Physics and CP Violation, December 3 -7, 1999, Taipei