B^0_s and B^0 Mixing in the Standard Model and Beyond: A Progress Report

Details B^0_s and B^0 Mixing in the Standard Model and Beyond: A Progress Report B^0_s and B^0 Mixing in the Standard Model and Beyond: A Progress Report

2010-11-11

arxiv.org/abs/1011.2570v2

PoS Lattice2010:299,2010

Physics

High Energy Physics

High Energy Physics - Lattice

2 references added to introduction. 7 pages, 4 figures, Presented at the XXVIII International Symposium on Lattice Field Theor

Scientific paper

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.

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