$D$ semileptonic form factors and $|V_{cs(d)}|$ from 2+1 flavor lattice QCD

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The measured partial widths of the semileptonic decays D {yields} K{ell}{nu} and D {yields} {pi}{ell}{nu} can be combined with the form factors calculated on the lattice to extract the CKM matrix elements |V{sub cs}| and |V{sub 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 ... continued below

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7 pages

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Bailey, Jon A.; Bazavov, A.; El-Khadra, A.X.; Gottlieb, Steven; Jain, R.D.; Kronfeld, A.S. et al. November 1, 2011.

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The measured partial widths of the semileptonic decays D {yields} K{ell}{nu} and D {yields} {pi}{ell}{nu} can be combined with the form factors calculated on the lattice to extract the CKM matrix elements |V{sub cs}| and |V{sub 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 q{sup 2} = 0 to below 5%.

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7 pages

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  • Journal Name: Submitted to Proceedings of Science

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  • Report No.: FERMILAB-CONF-11-623-T
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 1030748
  • Archival Resource Key: ark:/67531/metadc841372

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  • November 1, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 30, 2016, 3:38 p.m.

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Bailey, Jon A.; Bazavov, A.; El-Khadra, A.X.; Gottlieb, Steven; Jain, R.D.; Kronfeld, A.S. et al. $D$ semileptonic form factors and $|V_{cs(d)}|$ from 2+1 flavor lattice QCD, article, November 1, 2011; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc841372/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.