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B-meson mixing from full lattice QCD with physical u, d, s and c quarks

We present the first lattice QCD calculation of the $B_s$ and $B_d$ mixing parameters with physical light quark masses. We use MILC gluon field configurations that include $u$, $d$, $s$ and $c$ sea quarks at 3 values of the lattice spacing and with 3 values of the $u/d$ quark mass going down to the physical value. We use improved NRQCD for the valence $b$ quarks. Preliminary results show significant improvements over earlier values.

preprint2014arXivOpen access
R. J. DowdallC. T. H. DaviesR. R. HorganG. P. LepageC. J. MonahanJ. Shigemitsu
hep-lat
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Open access6 authors1 topic
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R. J. DowdallC. T. H. DaviesR. R. HorganG. P. LepageC. J. MonahanJ. Shigemitsu

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