Scaling and Further Tests of Heavy Meson Decay Constant Determinations from Nonrelativistic QCD
Collins, S. · Davies, C. T. H. · Hein, J. · Lepage, G. P. · Morningstar, C. J. · Shigemitsu, J. · Sloan, J.
Original · EN
We present results for the Bₛ meson decay constant fBₛ from simulations at three lattice spacings in the range a⁻¹=1.1 to 2.6 GeV using NRQCD heavy quarks and clover light quarks in the quenched approximation. We study scaling of this quantity and check the consistency between mesons decaying from rest and from a state with nonzero spatial momentum. The cancellation of power law contributions that arise in the NRQCD formulation of heavy-light currents is discussed. On the coarsest lattice the Dₛ meson decay constant fDₛ is calculated. Our best values for the decay constants are given by fBₛ = 187(4)(4)(11)(2)(7)(6) MeV and fDₛ = 223(6)(31)(38)(23)(9)(⁺³₋₁) MeV.
English translation
This paper has no Arabic translation yet. Be the first: it takes a few seconds, and the result is stored for every future reader.