A complete analysis of FCNC and CP constraints in general SUSY extensions of the standard model

Abstract

We analyze the full set of constraints on gluino-and photino-mediated SUSY contributions to FCNC and CP violating phenomena. We use the mass insertion method, hence providing a model-independent parameterization which can be readily applied in testing extensions of the MSSM. In addition to clarifying controversial points in the literature, we provide a more exhaustive analysis of the CP constraints, in particular concerning ε ′ /ε. As physically meaningful applications of our analysis, we study the implications in SUSY-GUT's and effective supergravities with flavour non-universality. This allows us to detail the domain of applicability and the correct procedure of implementation of the FC mass insertion approach.

Studying ofBs0−B¯s0mixing andBs→KWang1, Xu2, Chang3 et al. 2011Phys. Rev. D383430View full textAdd to dashboardCite

“…In general SUSY, we only consider these potentially large gluino box and penguin contributions and neglect a multitude of other diagrams, which are parametrically suppressed by small electroweak gauge coupling [19][20][21][22]. The relevant Wilson coefficients of b → suū process due to the gluino penguin or box diagrams, which are shown in Fig.…”

“…1 and Fig. 2, respectively, involving the LL and LR insertions are given (at the scale µ ∼ m W ∼ mq) by [19,[27][28][29] C SU SY…”

“…Inspired by the recent measurements from CDF and DØ collaborations , we study B 0 s −B 0 s mixing, B s → K ( * )− K ( * )+ and B → X s γ decays in the usual MI approximation [18,19] of general SUSY models, where flavor violation due to the gluino mediation can be important. The chargino-stop and the charged Higgs-top loop contributions are parametrically suppressed relative to the gluino contributions, and thus are ignored following [19][20][21][22]. Following the similar way to our previous article [23], we consider the LL, RR, LR and RL four kinds of the MIs with m 2 g /m 2 q = 0.25, 1, 4, 9, respectively.…”

Enhanced Higgs associated production with a top quark pair in the NMSSM with light singlets

“…are sensitive to sources of flavor violation beyond MFV, for example to flavor structure of the down squark parameters via loops with gluinos [77], that have a minor effect in Higgs physics, that is the subject of this work. The only measurement that is in more than 2σ tension with all the benchmarks in the MFV scenario is the combined CMS and LHCb analysis of B s → µ + µ − and B d → µ + µ − decays [78].…”

CP-violating asymmetry in p in the Skyrme model

“…Here (δ d LR ) ij = (M 2 d ) i L j R /m 2 q denote the off-diagonal entries of the (down-type) squark mass matrix in super-CKM basis [8,9] and x = m 2 g /m 2 q the ratio of gluino and squark mass squared. The loop function G 0 (x) is [10] G 0 (x) = x 22 − 20x − 2x 2 + (16x − x 2 + 9)logx…”