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| — | preprints:2009:ttp09-28 [2016/03/17 11:03] (current) – created - external edit 127.0.0.1 |
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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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