D semileptonic form factors and |V_cs(d)| from 2+1 flavor lattice QCD

Details D semileptonic form factors and |V_cs(d)| from 2+1 flavor lattice QCD D semileptonic form factors and |V_cs(d)| from 2+1 flavor lattice QCD

2011-11-23

arxiv.org/abs/1111.5471v1

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 4 figures, proceedings of the XXIX International Symposium on Lattice Field Theory - Lattice 2011, July 10-16, 2011,

Scientific paper

The measured partial widths of the semileptonic decays D to K l nu and D to pi l nu can be combined with the form factors calculated on the lattice to extract the CKM matrix elements |V_cs| and |V_cd|. The lattice calculations can be checked by comparing the form factor shapes from the lattice and experiment. We have generated a sizable data set by using heavy clover quarks with the Fermilab interpretation for charm and asqtad staggered light quarks on 2+1 flavor MILC ensembles with lattice spacings of approximately 0.12, 0.09, 0.06, and 0.045 fm. Preliminary fits to staggered chiral perturbation theory suggest that we can reduce the uncertainties in the form factors at zero invariant mass to below 5%.

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