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Paper detail

B-physics from lattice QCD...with a twist

We present a precise lattice QCD determination of the b-quark mass, of the B and Bs decay constants and first results for the B-meson bag parameters. For our computation we employ the so-called ratio method and our results benefit from the use of improved interpolating operators for the B-mesons. QCD calculations are performed with Nf = 2 dynamical light-quarks at four values of the lattice spacing and the results are extrapolated to the continuum limit. The preliminary results are mb(mb) = 4.35(12) GeV for the MSbar b-quark mass, fBs = 234(6) MeV and fB = 197(10) MeV for the B-meson decay constants, BBs(mb) = 0.90(5) and BB(mb) = 0.87(5) for the B-meson bag parameters.

preprint2012arXivOpen access
N. CarrascoP. DimopoulosR. FrezzottiV. GimenezG. HerdoizaV. LubiczG. MartinelliC. MichaelD. PalaoG. C. RossiF. SanfilippoA. ShindlerS. SimulaC. Tarantino
hep-exhep-phhep-lat
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N. CarrascoP. DimopoulosR. FrezzottiV. GimenezG. HerdoizaV. LubiczG. MartinelliC. MichaelD. PalaoG. C. RossiF. SanfilippoA. ShindlerS. SimulaC. Tarantino

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