Scaling and Further Tests of Heavy Meson Decay Constant Determinations from Nonrelativistic QCD
Abstract
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.
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.