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

2011/11/23 by Bailey, Jon A., Bazavov, A., El-Khadra, A. X. +5
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1111.5471

Abstract

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%.

Related

• Charm semileptonic decays and |V_cs(d)| from heavy clover quarks and 2+1 flavor asqtad staggered ensembles
• The shape of the D -> K semileptonic form factor from full lattice QCD and V_cs
• D-meson semileptonic form factors at zero momentum transfer in (2+1+1)-flavor lattice QCD
• D to K and D to pi semileptonic form factors from Lattice QCD
• Form factors of the D_s → ϕℓ ν_ℓ semileptonic decay with (2+1)-flavor lattice QCD