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Complete set of Δ B = 2 and Δ C = 2 Matrix elements in heavy meson chiral perturbation

Presenter: David Lin — National Chiao-Tung University, Taiwan

William Detmold, C.-J. David Lin

We present the light quark-mass and spatial volume dependence of the matrix elements of Δ B=2 and Δ C=2 four-quark operators relevant for B(s)0B(s)0 and D0D0 mixing, and the Bs meson width difference. We conclude that the chiral extrapolations for matrix elements of heavy-light meson mixing beyond the Standard Model, and those relevant for the Bs width difference are more complicated than that for the Standard Model mixing matrix elements.