Flavor-Change with Ultra-Light Sbottom and Gluinos

Abstract

Implications of a 2 - 5.5 GeV sbottom and 12 - 16 GeV gluino masses for rare B decay phenomenology are discussed. An effective Hamiltonian is constructed in which the gluinos are integrated out and a \tilde{b} squark remains among the light flavor degrees of freedom. Restrictive constraints come from $b\to s\gamma andb\to sg,buttheyallowasubstantiallyenhancedinclusivebdecayrateintocharmlesshadronicfinalstates,and\mathcal{O}(10$B \to X_s \gamma and B^\pm \to K^0 \pi^\pm decays, which are an order of magnitude larger than in the Standard Model. New contributions to B_s mixing are negligible but significant effects in B_d mixing may be possible.

Comments: 8 pages, latex. Talk given at International Europhysics Conference on High-Energy Physics (HEP 2001), Budapest, Hungary, 12-18 Jul 2001