Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-05-13
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 10 figures, version accepted for publication in PRD, eq. (14) and eq. (15) corrected
Scientific paper
10.1103/PhysRevD.84.035030
In this article we investigate the consequences of radiative flavor violation (RFV) in the Minimal Supersymmetric Standard Model (MSSM). In this framework the small off-diagonal elements of the Cabibbo-Kobayashi-Maskawa (CKM) matrix and the small quark masses of the first two generations are generated from the trilinear supersymmetry-breaking terms. The impact of RFV on flavor-physics observables is studied in detail. We focus on the limiting cases in which the CKM matrix is either generated in the down-sector, i.e. by the soft SUSY-breaking mass insertions delta^dLR_i3 (i=1,2), or in the up-quark sector, i.e. by the mass insertions delta^uLR_i3. In the first case we find an enhancement of b->s gamma, which constrains the allowed range of sparticle masses (Fig. 3). In addition, neutral Higgs penguins significantly contribute to B_s,d->mu^+mu^- and, if also delta^dLR_32 is different from zero, these Higgs effects are capable of explaining the observed CP phase in the B_s system. If, on the other hand, the CKM generation takes place in the up-sector, |epsilon_K| receives additional positive contributions enforcing large squark and gluino masses (see Fig. 8). In this case also the rare decay K->pi nu nu receives sizable contributions. In conclusion we find that for SUSY masses around 1 TeV RFV is an interesting alternative to Minimal Flavor Violation (MFV).
Crivellin Andreas
Hofer Lars
Nierste Ulrich
Scherer Dominik
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