Heavy-strange meson decay constants in the continuum limit of quenched QCD

Michele Della Morte, Stephan Durr, Damiano Guazzini, Jochen Heitger, Andreas Juttner, Rainer Sommer

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

We improve a previous quenched result for heavy-light pseudoscalar meson decay constants with the light quark taken to be the strange quark. A finer lattice resolution (a ~ 0.05 fm) in the continuum limit extrapolation of the data computed in the static approximation is included. We also give further details concerning the techniques used in order to keep the statistical and systematic errors at large lattice sizes L/a under control. Our final result, obtained by combining these data with determinations of the decay constant for pseudoscalar mesons around the D_s, follows nicely the qualitative expectation of the 1/m-expansion with a (relative) 1/m-term of about -0.5 GeV/m_PS. At the physical b-quark mass we obtain F_{B_s} = 193(7) MeV, where all errors apart from the quenched approximation are included.
OriginalsprogUdefineret/Ukendt
TidsskriftJHEP
ISSN1126-6708
DOI
StatusUdgivet - 11. okt. 2007

Bibliografisk note

20 pages including figures and tables, latex2e, uses JHEP3.cls; version published in JHEP, discussion of the continuum limit extended and references added, final results only minimally affected

Emneord

  • hep-lat
  • hep-ph

Citer dette

Morte, Michele Della ; Durr, Stephan ; Guazzini, Damiano ; Heitger, Jochen ; Juttner, Andreas ; Sommer, Rainer. / Heavy-strange meson decay constants in the continuum limit of quenched QCD. I: JHEP. 2007.
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Heavy-strange meson decay constants in the continuum limit of quenched QCD. / Morte, Michele Della; Durr, Stephan; Guazzini, Damiano; Heitger, Jochen; Juttner, Andreas; Sommer, Rainer.

I: JHEP, 11.10.2007.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Heavy-strange meson decay constants in the continuum limit of quenched QCD

AU - Morte, Michele Della

AU - Durr, Stephan

AU - Guazzini, Damiano

AU - Heitger, Jochen

AU - Juttner, Andreas

AU - Sommer, Rainer

N1 - 20 pages including figures and tables, latex2e, uses JHEP3.cls; version published in JHEP, discussion of the continuum limit extended and references added, final results only minimally affected

PY - 2007/10/11

Y1 - 2007/10/11

N2 - We improve a previous quenched result for heavy-light pseudoscalar meson decay constants with the light quark taken to be the strange quark. A finer lattice resolution (a ~ 0.05 fm) in the continuum limit extrapolation of the data computed in the static approximation is included. We also give further details concerning the techniques used in order to keep the statistical and systematic errors at large lattice sizes L/a under control. Our final result, obtained by combining these data with determinations of the decay constant for pseudoscalar mesons around the D_s, follows nicely the qualitative expectation of the 1/m-expansion with a (relative) 1/m-term of about -0.5 GeV/m_PS. At the physical b-quark mass we obtain F_{B_s} = 193(7) MeV, where all errors apart from the quenched approximation are included.

AB - We improve a previous quenched result for heavy-light pseudoscalar meson decay constants with the light quark taken to be the strange quark. A finer lattice resolution (a ~ 0.05 fm) in the continuum limit extrapolation of the data computed in the static approximation is included. We also give further details concerning the techniques used in order to keep the statistical and systematic errors at large lattice sizes L/a under control. Our final result, obtained by combining these data with determinations of the decay constant for pseudoscalar mesons around the D_s, follows nicely the qualitative expectation of the 1/m-expansion with a (relative) 1/m-term of about -0.5 GeV/m_PS. At the physical b-quark mass we obtain F_{B_s} = 193(7) MeV, where all errors apart from the quenched approximation are included.

KW - hep-lat

KW - hep-ph

U2 - 10.1088/1126-6708/2008/02/078

DO - 10.1088/1126-6708/2008/02/078

M3 - Tidsskriftartikel

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

SN - 1126-6708

ER -