[SEMINARI]: Dr. Lunghi: Extended Minimal Flavor Violation MSSM and implications for B physics

[Arcadi Santamaria Luna]

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                              S E M I N A R I

             [Image]   Departament de Física Teòrica    [Image]
                          Universitat de València
                       Institut de Física Corpuscular
                       Universitat de València - CSIC

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      Extended Minimal Flavor Violation MSSM and implications for B physics

                                Enrico Lunghi

                                   (DESY)

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                     Aula de Seminaris de Física Teòrica
                Thursday 13 of September of 2001 at 12:30 PM
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                                    Resum

The recently reported measurements of the CP asymmetry a(psi K) by the BABAR
   and BELLE collaborations are in good agreement with the standard model
  prediction. With the anticipated precision in a(psi K) at the B factories
 and hadron colliders, one hopes to pin down any possible deviation from the
     SM. We discuss an extension of the MFV-supersymmetric models which
 comfortably accommodates the current measurements of the CP asymmetry a(psi
 K), but differs from the SM due to an additional flavour changing structure
   beyond the CKM matrix. We analyze the compatibility of this model with
  present data and suggest specific tests in forthcoming experiments in $B$
 physics. In addition to the CP-asymmetries in B-meson decays, such as a(psi
    K) and a(pi pi), and the mass difference Delta M_s in the Bs- bar(Bs)
 system, we emphasize measurements of the radiative transition b -> d gamma
      as sensitive probes of the postulated flavour changing structure.
   Interestingly, the CKM--unitarity analysis in these models also allows
   solutions with gamma > pi/2, where is the inner angle of the unitarity
 triangle. Such large values of gamma are hinted by the current measurements
       of the branchig ratios for the decays B -> pi pi and B-> K pi.

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