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High Energy Physics - Lattice

arXiv:1603.04306 (hep-lat)
[Submitted on 14 Mar 2016 (v1), last revised 10 Jun 2016 (this version, v2)]

Title:Mass of the b-quark and B-decay constants from Nf=2+1+1 twisted-mass Lattice QCD

Authors:ETM Collaboration: A. Bussone, N. Carrasco, P. Dimopoulos, R. Frezzotti, P. Lami, V. Lubicz, E. Picca, L. Riggio, G.C. Rossi, S. Simula, C. Tarantino
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Abstract:We present precise lattice computations for the b-quark mass, the quark mass ratios mb/mc and mb/ms as well as the leptonic B-decay constants. We employ gauge configurations with four dynamical quark flavors, up/down, strange and charm, at three values of the lattice spacing (a ~ 0.06 - 0.09 fm) and for pion masses as low as 210 MeV. Interpolation in the heavy quark mass to the bottom quark point is performed using ratios of physical quantities computed at nearby quark masses exploiting the fact that these ratios are exactly known in the static quark mass limit. Our results are also extrapolated to the physical pion mass and to the continuum limit and read: mb(MSbar, mb) = 4.26(10) GeV, mb/mc = 4.42(8), mb/ms = 51.4(1.4), fBs = 229(5) MeV, fB = 193(6) MeV, fBs/fB = 1.184(25) and (fBs/fB)/(fK/fpi) = 0.997(17).
Comments: Version to appear in PRD. Added comments to simulation setup and error budget discussion. 1+20 pages, 9 figures
Subjects: High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1603.04306 [hep-lat]
  (or arXiv:1603.04306v2 [hep-lat] for this version)
  https://doi.org/10.48550/arXiv.1603.04306
Journal reference: Phys. Rev. D 93, 114505 (2016)
Related DOI: https://doi.org/10.1103/PhysRevD.93.114505

Submission history

From: Petros Dimopoulos [view email]
[v1] Mon, 14 Mar 2016 15:35:07 UTC (227 KB)
[v2] Fri, 10 Jun 2016 13:38:28 UTC (176 KB)
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