出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Using the example of the rare decay B ! Xs, we analyse the importance of
interference e
ects for the bounds on the parameters in the squark mass matrices within
the unconstrained MSSM. In former model-independent analyses no correlations between
the di
erent sources of flavour violation were taken into account. In our new analysis we
include the contributions from charged Higgs bosons, charginos and neutralinos and their
interference e
ects and, even more important, the e
ects that appear when several flavour
violating parameters, i.e. several o
-diagonal elements in the squark mass matrices, are
switched on simultaneously. We derive new bounds on certain o
-diagonal elements of
the squark-mass matrix which are in general one order of magnitude weaker than the
previous bounds
