Lattice HQET with exponentially improved statistical precision

M. Della Morte, S. Durr, J. Heitger, H. Molke, J. Rolf, A. Shindler, R. Sommer

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

We introduce an alternative discretization for static quarks on the lattice retaining the O(a) improvement properties of the Eichten-Hill action. In this formulation, statistical fluctuations are reduced by a factor which grows exponentially with Euclidean time, x_0. For the first time, B-meson correlation functions are computed with good statistical precision in the static approximation for x_0>1 fm. At lattice spacings a \approx 0.1 fm, a \approx 0.08 fm and a \approx 0.07 fm the B_s-meson decay constant is determined in static and quenched approximations. A correction due to the finite mass of the b-quark is estimated by combining these static results with a recent determination of F_Ds.
OriginalsprogUdefineret/Ukendt
TidsskriftPhys.Lett.B
DOI
StatusUdgivet - 11. jul. 2003

Bibliografisk note

Eqs. 14 and 15 corrected. Changes by up to 1 sigma in Table 1, Eq. 22 changed consequently. Result in Eq. 24 unchanged

Emneord

  • hep-lat

Citer dette

Morte, M. Della ; Durr, S. ; Heitger, J. ; Molke, H. ; Rolf, J. ; Shindler, A. ; Sommer, R. / Lattice HQET with exponentially improved statistical precision. I: Phys.Lett.B. 2003.
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Lattice HQET with exponentially improved statistical precision. / Morte, M. Della; Durr, S.; Heitger, J.; Molke, H.; Rolf, J.; Shindler, A.; Sommer, R.

I: Phys.Lett.B, 11.07.2003.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Lattice HQET with exponentially improved statistical precision

AU - Morte, M. Della

AU - Durr, S.

AU - Heitger, J.

AU - Molke, H.

AU - Rolf, J.

AU - Shindler, A.

AU - Sommer, R.

N1 - Eqs. 14 and 15 corrected. Changes by up to 1 sigma in Table 1, Eq. 22 changed consequently. Result in Eq. 24 unchanged

PY - 2003/7/11

Y1 - 2003/7/11

N2 - We introduce an alternative discretization for static quarks on the lattice retaining the O(a) improvement properties of the Eichten-Hill action. In this formulation, statistical fluctuations are reduced by a factor which grows exponentially with Euclidean time, x_0. For the first time, B-meson correlation functions are computed with good statistical precision in the static approximation for x_0>1 fm. At lattice spacings a \approx 0.1 fm, a \approx 0.08 fm and a \approx 0.07 fm the B_s-meson decay constant is determined in static and quenched approximations. A correction due to the finite mass of the b-quark is estimated by combining these static results with a recent determination of F_Ds.

AB - We introduce an alternative discretization for static quarks on the lattice retaining the O(a) improvement properties of the Eichten-Hill action. In this formulation, statistical fluctuations are reduced by a factor which grows exponentially with Euclidean time, x_0. For the first time, B-meson correlation functions are computed with good statistical precision in the static approximation for x_0>1 fm. At lattice spacings a \approx 0.1 fm, a \approx 0.08 fm and a \approx 0.07 fm the B_s-meson decay constant is determined in static and quenched approximations. A correction due to the finite mass of the b-quark is estimated by combining these static results with a recent determination of F_Ds.

KW - hep-lat

U2 - 10.1016/j.physletb.2005.03.017

DO - 10.1016/j.physletb.2005.03.017

M3 - Tidsskriftartikel

JO - Phys.Lett.B

JF - Phys.Lett.B

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