B_d-Bbar_d Mixing and the B_d -> J/psi K_s Asymmetry in General SUSY Models

D. Becirevic , M. Ciuchini , E. Franco , V. Gimenez , G. Martinelli , A. Masiero , M. Papinutto , J. Reyes

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L. Silvestrini

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classification ✦ hep-ph

keywords asymmetryd-bbarmixingsusyapproximationcomputedconstraintscontributions

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We present a next-to-leading order determination of the gluino-mediated SUSY contributions to B_d-Bbar_d mixing and to the CP asymmetry a_{J/psi K_s} in the framework of the mass-insertion approximation. Using hadronic matrix elements recently computed on the lattice, we obtain improved constraints on the squark-mass splittings.

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