B -meson decay constants from 2+1 -flavor lattice QCD with domain-wall light quarks and relativistic heavy quarks

Christ, Norman H.; Flynn, Jonathan M.; Izubuchi, Taku; Kawanai, Taichi; Lehner, Christoph; Soni, Amarjit; Van de Water, Ruth S.; Witzel, Oliver

doi:10.1103/PhysRevD.91.054502

Title: $B$ -meson decay constants from $2 + 1$ -flavor lattice QCD with domain-wall light quarks and relativistic heavy quarks

Abstract

We calculate the B-meson decay constants f_B, f_{B_s}, and their ratio in unquenched lattice QCD using domain-wall light quarks and relativistic b quarks. We use gauge-field ensembles generated by the RBC and UKQCD collaborations using the domain-wall fermion action and Iwasaki gauge action with three flavors of light dynamical quarks. We analyze data at two lattice spacings of a ≈ 0.11, 0.086 fm with unitary pion masses as light as M_π ≈ 290 MeV; this enables us to control the extrapolation to the physical light-quark masses and continuum. For the b quarks we use the anisotropic clover action with the relativistic heavy-quark interpretation, such that discretization errors from the heavy-quark action are of the same size as from the light-quark sector. We renormalize the lattice heavy-light axial-vector current using a mostly nonperturbative method in which we compute the bulk of the matching factor nonperturbatively, with a small correction, that is close to unity, in lattice perturbation theory. We also improve the lattice heavy-light current through O(α_sa). We extrapolate our results to the physical light-quark masses and continuum using SU(2) heavy-meson chiral perturbation theory, and provide a complete systematic error budget. We obtain f_B₀ = 199.5(12.6) MeV, f_B⁺=195.6(14.9) MeV, f_{B_s}=235.4(12.2) MeV,more »« less

Authors:

Christ, Norman H. ^[1]; Flynn, Jonathan M. ^[2]; Izubuchi, Taku ^[3]; Kawanai, Taichi ^[4]; Lehner, Christoph ^[3]; Soni, Amarjit ^[3]; Van de Water, Ruth S. ^[5]; Witzel, Oliver ^[6]

Columbia Univ., New York, NY (United States)
Univ. of Southampton, Southampton (United Kingdom)
Brookhaven National Lab. (BNL), Upton, NY (United States)
RIKEN, Wako (Japan); Brookhaven National Lab. (BNL), Upton, NY (United States)
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Boston Univ., Boston, MA (United States)

Publication Date:: Tue Mar 10 00:00:00 EDT 2015

Research Org.:: Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Org.:: RBC and UKQCD Collaborations

OSTI Identifier:: 1289771

Alternate Identifier(s):: OSTI ID: 1181051

Report Number(s):: FERMILAB-PUB-14-100-T; arXiv:1404.4670
Journal ID: ISSN 1550-7998; PRVDAQ; 1291284

Grant/Contract Number:: AC02-07CH11359; FG02-92ER40699; SC0008814

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. D, Particles, Fields, Gravitation and Cosmology

Additional Journal Information:: Journal Volume: 91; Journal Issue: 5; Journal ID: ISSN 1550-7998

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Christ, Norman H., Flynn, Jonathan M., Izubuchi, Taku, Kawanai, Taichi, Lehner, Christoph, Soni, Amarjit, Van de Water, Ruth S., and Witzel, Oliver. B -meson decay constants from 2+1 -flavor lattice QCD with domain-wall light quarks and relativistic heavy quarks.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevD.91.054502.

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                    Christ, Norman H., Flynn, Jonathan M., Izubuchi, Taku, Kawanai, Taichi, Lehner, Christoph, Soni, Amarjit, Van de Water, Ruth S., & Witzel, Oliver. B -meson decay constants from 2+1 -flavor lattice QCD with domain-wall light quarks and relativistic heavy quarks.  United States.  https://doi.org/10.1103/PhysRevD.91.054502

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                    Christ, Norman H., Flynn, Jonathan M., Izubuchi, Taku, Kawanai, Taichi, Lehner, Christoph, Soni, Amarjit, Van de Water, Ruth S., and Witzel, Oliver. Tue .  
"B -meson decay constants from 2+1 -flavor lattice QCD with domain-wall light quarks and relativistic heavy quarks".  United States.  https://doi.org/10.1103/PhysRevD.91.054502.  https://www.osti.gov/servlets/purl/1289771.

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@article{osti_1289771,

  title        = {B -meson decay constants from 2+1 -flavor lattice QCD with domain-wall light quarks and relativistic heavy quarks},

  author       = {Christ, Norman H. and Flynn, Jonathan M. and Izubuchi, Taku and Kawanai, Taichi and Lehner, Christoph and Soni, Amarjit and Van de Water, Ruth S. and Witzel, Oliver},

  abstractNote = {We calculate the B-meson decay constants fB, fBs, and their ratio in unquenched lattice QCD using domain-wall light quarks and relativistic b quarks. We use gauge-field ensembles generated by the RBC and UKQCD collaborations using the domain-wall fermion action and Iwasaki gauge action with three flavors of light dynamical quarks. We analyze data at two lattice spacings of a ≈ 0.11, 0.086 fm with unitary pion masses as light as Mπ ≈ 290 MeV; this enables us to control the extrapolation to the physical light-quark masses and continuum. For the b quarks we use the anisotropic clover action with the relativistic heavy-quark interpretation, such that discretization errors from the heavy-quark action are of the same size as from the light-quark sector. We renormalize the lattice heavy-light axial-vector current using a mostly nonperturbative method in which we compute the bulk of the matching factor nonperturbatively, with a small correction, that is close to unity, in lattice perturbation theory. We also improve the lattice heavy-light current through O(αsa). We extrapolate our results to the physical light-quark masses and continuum using SU(2) heavy-meson chiral perturbation theory, and provide a complete systematic error budget. We obtain fB0 = 199.5(12.6) MeV, fB+=195.6(14.9) MeV, fBs=235.4(12.2) MeV, fBs/fB0=1.197(50), and fBs/fB+=1.223(71), where the errors are statistical and total systematic added in quadrature. Finally, these results are in good agreement with other published results and provide an important independent cross-check of other three-flavor determinations of B-meson decay constants using staggered light quarks.},

  doi          = {10.1103/PhysRevD.91.054502},

  journal      = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},

  number       = 5,

  volume       = 91,

  place        = {United States},

  year         = {Tue Mar 10 00:00:00 EDT 2015},

  month        = {Tue Mar 10 00:00:00 EDT 2015}

}

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Title: B -meson decay constants from 2 + 1 -flavor lattice QCD with domain-wall light quarks and relativistic heavy quarks

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Nonperturbative comparison of clover and highly improved staggered quarks in lattice QCD and the properties of the ϕ meson text, January 2017

Title: $B$ -meson decay constants from $2 + 1$ -flavor lattice QCD with domain-wall light quarks and relativistic heavy quarks

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FLAG Review 2019
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Nonperturbative comparison of clover and highly improved staggered quarks in lattice QCD and the properties of the ϕ meson
text, January 2017