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A Determination of the Bs0 and Bd0 mixing parameters in 2+1 lattice QCD

Presenter: Elvira Gamiz — University of Illinois

Elvira Gamiz and R. Todd Evans for the Fermilab Lattice and MILC collaborations

We report on the advances in our uquenched calculation of the matrix elements relevant for the analysis of B0B0 mixing using the Asqtad (light quark) and Fermilab (heavy quark) actions. The fitting and matching procedures are discussed for both the Bs0 and Bd0 mixing parameters. We have calculated the hadronic parameters for the mass and width differences in the neutral B meson system. Results are presented for the corresponding bag parameters as well as fB2 B^ and ξ2.