ε′/ε and Rare K and B Decays in the MSSM
نویسندگان
چکیده
We analyze the CP violating ratio ε/ε and rare K and B decays in the MSSM with minimal flavour and CP violation, including NLO QCD corrections and imposing constraints on the supersymmetric parameters coming from ε, B0 d,s − B̄0 d,s mixings, B → Xsγ, ∆̺ in the electroweak precision studies and from the lower bound on the neutral Higgs mass. We provide a compendium of phenomenologically relevant formulae in the MSSM. Denoting by T (Q) the MSSM prediction for a given quantity normalized to the Standard Model result we find the ranges: 0.53 ≤ T (ε/ε) ≤ 1.07, 0.65 ≤ T (K+ → π+νν̄) ≤ 1.02, 0.41 ≤ T (KL → π0νν̄) ≤ 1.03, 0.48 ≤ T (KL → π0e+e−) ≤ 1.10, 0.73 ≤ T (B → Xsνν̄) ≤ 1.34 and 0.68 ≤ T (Bs → μμ̄) ≤ 1.53. We point out that these ranges will be considerably reduced when the lower bounds on the neutral Higgs mass and tan β improve. Some contour plots illustrate the dependences of the quantities above on the relevant supersymmetric parameters. As a byproduct of this work we update our previous analysis of ε/ε in the SM and find in NDR ε/ε = (9.2 −4.0), a value 15% higher than in our 1999 analysis.
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