TY - JOUR AU - Ellis, J. AU - Hodgkinson, R. N. AU - Lee, J. S. AU - Pilaftsis, A. PY - 2010 DA - 2010// TI - Flavour geometry and effective Yukawa couplings in the MSSM T2 - J. High Energy Phys. JO - Journal of High Energy Physics SP - 016 EP - 35pp VL - 02 IS - 2 PB - Springer KW - Supersymmetric Standard Model KW - 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. SN - 1126-6708 UR - http://arxiv.org/abs/0911.3611 UR - https://doi.org/10.1007/JHEP02(2010)016 DO - 10.1007/JHEP02(2010)016 LA - English N1 - ISI:000275223100016 ID - Ellis_etal2010 ER -