title: Weakened constraints from b-->sgamma on supersymmetry flavor mixing due to next-to-leading-order corrections.
abstract: We examine the process B-->X(s)gamma in minimal supersymmetry (SUSY) with general squark flavor mix-ings. We include all relevant next-to-leading order (NLO) QCD corrections and dominant NLO SUSY effects from the gluino. We find that gluino-squark corrections to down-type quark masses induce large NLO corrections to the dominant Wilson coefficients whose size is often similar to those at LO, es-pecially at large tan(beta. For micro>0, destructive interference and suppression by the renormalization group running lead to a "focusing effect" of reducing the size of gluino corrections to the branching ratio, and also of reducing the LO sensitivity to flavor mixings among squarks. Constraints from B(B-->X(s)gamma) on the SUSY-breaking scale can become significantly weakened relative to the minimal flavor violation case, even, at large tan(beta, for small flavor mixings. The case of micro<0 also becomes allowed.
authors.affiliation: Department of Physics, KAIST, Daejeon, 305-701, Korea.
authors.forename: Ken-Ichi
authors.initials: K
authors.lastname: Okumura
authors.forename: Leszek
authors.initials: L
authors.lastname: Roszkowski