Speaker
Dr
Christian Gross
(Uni Basel)
Description
Recent experimental and theoretical progress regarding B --> K^(*) l^+ l^− decays led to improved bounds on the Wilson coefficients C_9 and C_10 of four-fermion operators of the |∆B| = |∆S| = 1 effective Hamiltonian. We analyze the resulting implications on squark flavor violation in the MSSM and obtain new constraints on flavor-changing left-right mixing in the up-squark-sector. We find the dimensionless flavor mixing parameter (δu^23)_LR, depending on the flavor-diagonal MSSM masses and couplings, to be as low as ≲ 0.1. This has implications for models based on radiative flavor violation and leads to BR(B_s --> μ^+ μ^−) ≳ 1×10^−9. Rare top decays t --> c γ, t --> c g, t --> c Z have branching ratios predicted to be below ≲ few × 10^−8, 10^−6 and 10^−7, respectively.
Primary authors
Arnd Behring
(TU Dortmund)
Dr
Christian Gross
(Uni Basel)
Prof.
Gudrun Hiller
(TU Dortmund)
Stefan Schacht
(TU Dortmund)
