D semi-leptonic decay form factors with HISQ charm and light quarks

C. T. H. Davies; E. Follana; H. Na; J. Shigemitsu; P. Lepage

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D semi-leptonic decay form factors with HISQ charm and light quarks

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arxiv 0910.3919 v1 pith:2U7NAHMP submitted 2009-10-20 hep-lat hep-ph

D semi-leptonic decay form factors with HISQ charm and light quarks

H. Na , C. T. H. Davies , E. Follana , P. Lepage , J. Shigemitsu This is my paper

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keywords decaysemi-leptoniccharmfactorsformhisqlightmethod

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abstract

We present a program to study D semi-leptonic decay form factors with HISQ charm and light quarks. In this exploratory work, we study $D_s$ to $\eta_s$, $l\nu_l$ semi-leptonic decay on MILC coarse ($20^3\times64$) gauge configurations with 2+1 dynamical flavors. We develop a new method to calculate $f_+(0)$ and $f_0(q^2)$ from scalar current matrix elements, $<\pi|\bar{s}c|D>$, which does not require any operator renormalization. We also determine $f_+(q^2)$ and $f_0(q^2)$ from vector currents with a fully non-perturbative renormalization method.

D semi-leptonic decay form factors with HISQ charm and light quarks

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