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

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

doi:10.22323/1.091.0247

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

Oct, 2009

7 pages

Part of Proceedings, 27th International Symposium on Lattice field theory (Lattice 2009) : Beijing, P.R. China, July 26-31, 2009

Published in:

PoS LAT2009 (2009) 247

Contribution to:

- Lattice 2009

e-Print:

0910.3919 [hep-lat]

DOI:

10.22323/1.091.0247

View in:

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Abstract: (arXiv)

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.

decay: form factor
renormalization: nonperturbative
operator: renormalization
D/s: semileptonic decay
flavor: 3

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Figures(5)

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