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

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

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

Authors

Description

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.
17 pages, 13 figures