New flavor violations in supergravity models

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

“…B 0 s −B 0 s mixing, B s → K ( * )− K ( * )+ and B → X s γ decays are all induced by the b → s transition, and they involve the same set of the MI parameters. 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].…”

Single top quark production via SUSY-QCD FCNC couplings at the CERN LHC in the unconstrained MSSM

“…As mentioned in the introduction, most of previous literatures studied the FCNC processes in the MSSM by so-called mass insertion approximation [18]. However, when the off-diagonal elements in the up squark mass matrix become large, the mass insertion approximation is no longer valid [19,20].…”

“…As we know, most of the works within SUSY models are limited in some constrained MSSM, where the top quark FCNC couplings were studied through some SUSY-CKM matrices or mass insertion approximation [18]. However, it is interesting to study the top quark FCNC productions using soft SUSY broken parameters directly, and then establish some relations between the production cross sections and soft SUSY broken parameters in the mass eigenstate formalism [19,20].…”

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…”