PT Journal
AU Ellis, J
   Hodgkinson, RN
   Lee, JS
   Pilaftsis, A
TI Flavour geometry and effective Yukawa couplings in the MSSM
SO Journal of High Energy Physics
JI J. High Energy Phys.
PY 2010
BP 016
EP 35pp
VL 02
IS 2
DI 10.1007/JHEP02(2010)016
LA English
DE Supersymmetric Standard Model; B-Physics
AB We present a new geometric approach to the flavour decomposition of an arbitrary soft supersymmetry-breaking sector in the MSSM. Our approach is based on the geometry that results from the quark and lepton Yukawa couplings, and enables us to derive the necessary and sufficient conditions for a linearly-independent basis of matrices related to the completeness of the internal [SU(3) circle times U(1)](5) flavour space. In a second step, we calculate the effective Yukawa couplings that are enhanced at large values of tan beta for general soft supersymmetry-breaking mass parameters. We highlight the contributions due to non-universal terms in the flavour decompositions of the sfermion mass matrices. We present numerical examples illustrating how such terms are induced by renormalization-group evolution starting from universal input boundary conditions, and demonstrate their importance for the flavour-violating effective Yukawa couplings of quarks.
ER