Quark Loop Effects in Semileptonic Form Factors for Heavy-Light Mesons

Details Quark Loop Effects in Semileptonic Form Factors for Heavy-Light Mesons Quark Loop Effects in Semileptonic Form Factors for Heavy-Light Mesons

2003-09-12

arxiv.org/abs/hep-lat/0309055v1

Nucl.Phys.Proc.Suppl.129:364-365,2004

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice2003(heavy)

Scientific paper

10.1016/S0920-5632(04)90009-6

We present preliminary results of a determination of the semileptonic form factor for the decay of pseudoscalar heavy-light mesons to pseudoscalar light-light mesons in full QCD. In this preliminary study we focus on the effects of dynamical quark loops. Accordingly, we compare results of simulations with matched quenched and Asqtad dynamical gauge configurations. The latter include three flavors of light quarks. Our simulation uses clover Wilson valence quarks, treated in the Fermilab formalism. Preliminary results, as yet uncorrected by continuum matching factors, suggest a measurable enhancement in the form factor due to dynamical quark loops over the accessible range of $q^2$.

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