The measured partial widths of the semileptonic decays D → K`ν and D → π`ν can be combined with the form factors calculated on the lattice to extract the CKM matrix elements |Vcs| and |Vcd|. 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 q2 = 0 to below 5%.
|Journal||Proceedings of Science|
|Publication status||Published - 2011|
|Event||29th International Symposium on Lattice Field Theory, Lattice 2011 - Squaw Valley, Lake Tahoe, United States|
Duration: 2011 Jul 10 → 2011 Jul 16
Bibliographical noteFunding Information:
Computations were carried out with resources provided by the USQCD Collaboration, Argonne Leadership Computing Facility, and National Energy Research Scientific Computing Center, which are funded by the Office of Science of the U.S. DOE; and with resources provided by the National Institute for Computational Science, Pittsburgh Supercomputer Center, San Diego Supercomputer Center, and Texas Advanced Computing Center, which are funded through the National Science Foundation’s Teragrid/XSEDE Program. This work was supported in part by the U.S. DOE under grant Nos. DE-FG02-91ER40661 (S.G.), No. DE-FG02-91ER40677 (R.D.J., A.X.K.). This manuscript was co-authored by employees of Brookhaven Science Associates, LLC, under Contract No. DE-AC02-98CH10886 with the U.S. DOE. R.S.V. acknowledges support from BNL via the Goldhaber Distinguished Fellowship. J.A.B. is supported by the Creative Research Initiatives program (3348-20090015) of the NRF grant funded by the Korean government (MEST). Fermilab is operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the U.S. DOE.
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