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Paper detail

Recent results on B mixing and decay constants from HPQCD

We review recent results for B_d and B_s mixing parameters using MILC N_f=2+1 lattices, NRQCD b-quarks and AsqTad light quarks. Latest numbers for decay constants f_B and f_{B_s} are also presented. Combining our lattice results with experimental determinations of the mass differences ΔM_d and ΔM_s leads to an important ratio of elements of the CKM matrix, |V_{td}|/|V_{ts}| = 0.214(1)(5) and an updated Standard Model number for the branching fraction Br(B_s -> mu^+ mu^-) = 3.19(19) x 10^{-9}. Preliminary new results for f_{B_s} based on other actions are also described.

preprint2009arXivOpen access
J. ShigemitsuC. T. H. DaviesE. FollanaE. GamizE. GregoryG. P. LepageH. NaM. Wingate
hep-lat
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J. ShigemitsuC. T. H. DaviesE. FollanaE. GamizE. GregoryG. P. LepageH. NaM. Wingate

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