A Progress Report on B^0 Mixing
Chris Bouchard, Aida X El-Khadra, E. D. Freeland, Elvira Gamiz, Andreas S. Kronfeld · Proceedings of The XXVIII International Symposium on Lattice Field Theory — PoS(Lattice 2010) · 2011
We give a progress report on the calculation of B meson mixing matrix elements, focusing on contributions that could arise beyond the Standard Model.The calculation uses asqtad (light quark) and Fermilab (heavy quark) valence actions and MILC ensembles with 2+1 flavors of asqtad sea quarks.We report preliminary B 0 s fit results, at a lattice spacing of 0.12 fm, for the SUSY basis of effective four-quark mixing operators and include an estimate for the final error budget.