# Differences

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+ | ====== TTP09-28 Chirally enhanced corrections to FCNC processes in the generic MSSM ====== | ||

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+ | <hidden TTP09-28 Chirally enhanced corrections to FCNC processes in the generic MSSM > Chirally enhanced supersymmetric QCD corrections to FCNC processes are | ||

+ | investigated in the framework of the MSSM with generic sources of flavor | ||

+ | violation. These corrections arise from flavor-changing self-energy | ||

+ | diagrams and can be absorbed into a finite renormalization of the | ||

+ | squark-quark-gluino vertex. In this way enhanced two-loop and even | ||

+ | three-loop diagrams can be efficiently included into a leading-order | ||

+ | (LO) calculation. Our corrections substantially change the values of the | ||

+ | parameters delta^{d,LL}_{23}, delta^{d,LR}_{23}, delta^{d,RL}_{23}, and | ||

+ | delta^{d,RR}_{23} extracted from Br[B->X_s gamma] if tan(beta) is large. | ||

+ | We find stronger (weaker) constraints compared to the LO result for | ||

+ | negative (positive) values of mu. The constraints on | ||

+ | delta^{d,LR,RL}_{13} and delta^{d,LR,RL}_{23} from B_d mixing and B_s | ||

+ | mixing change drastically if the third-generation squark masses differ | ||

+ | from those of the first two generations. K mixing is more strongly | ||

+ | affected by the chirally enhanced loop diagrams and even sub-percent | ||

+ | deviations from degenerate down and strange squark masses lead to | ||

+ | profoundly stronger constraints on delta^{d,LR,RL}_{12}. | ||

+ | </hidden> | ||

+ | |**Andreas Crivellin and Ulrich Nierste** | | ||

+ | |** Phys.Rev. D81 095007 2010 ** | | ||

+ | | {{preprints:2009:ttp09-28.pdf|PDF}} {{preprints:2009:ttp09-28.ps|PostScript}} [[http://arxiv.org/abs/0908.4404|arXiv]] | | ||

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