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Title: Charm semileptonic decays and |Vcs(d)| from heavy clover quarks and 2+1 flavor asqtad staggered ensembles

Abstract

By combining experimentally measured partial branching fractions for the semileptonic decays D to K l nu and D to pi l nu with lattice calculations of the form factors f_+^{D to K}(q^2) and f_+^{D to pi}(q^2), one can extract the CKM matrix elements |V_{cs}| and |V_{cd}|. We are calculating the form factors by using Fermilab charm and asqtad staggered light and strange quarks on 2+1 flavor asqtad staggered ensembles generated by the MILC Collaboration. We vary the light valence quark masses from 0.4m_s to 0.05m_s (m_s is the strange sea-quark mass), and the lattice spacings, from about 0.12 fm to about 0.045 fm. We extrapolate to the physical light-quark mass and the continuum limit using heavy-light meson staggered chiral perturbation theory about the SU(2) and SU(3) limits, compare the resulting (preliminary) form factor shapes with experiment, and discuss our errors.

Authors:
 [1];  [2];  [2];  [3];  [2];  [4];  [4];  [3]
  1. Seoul Natl. U., Dept. Phys. Astron.
  2. Illinois U., Urbana
  3. Indiana U.
  4. Fermilab
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
Fermilab Lattice; MILC
OSTI Identifier:
1406473
Report Number(s):
arXiv:1211.4964; FERMILAB-CONF-12-610-T
1203461
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Journal Name:
PoS
Additional Journal Information:
Journal Volume: LATTICE2012; Conference: 30th International Symposium on Lattice Field Theory, Cairns, Australia, 06/24-06/29/2012
Country of Publication:
United States
Language:
English

Citation Formats

Bailey, Jon A., Du, D., El-Khadra, A. X., Gottlieb, Steven, Jain, R. D., Kronfeld, A. S., Van de Water, R. S., and Zhou, R. Charm semileptonic decays and |Vcs(d)| from heavy clover quarks and 2+1 flavor asqtad staggered ensembles. United States: N. p., 2012. Web.
Bailey, Jon A., Du, D., El-Khadra, A. X., Gottlieb, Steven, Jain, R. D., Kronfeld, A. S., Van de Water, R. S., & Zhou, R. Charm semileptonic decays and |Vcs(d)| from heavy clover quarks and 2+1 flavor asqtad staggered ensembles. United States.
Bailey, Jon A., Du, D., El-Khadra, A. X., Gottlieb, Steven, Jain, R. D., Kronfeld, A. S., Van de Water, R. S., and Zhou, R. Thu . "Charm semileptonic decays and |Vcs(d)| from heavy clover quarks and 2+1 flavor asqtad staggered ensembles". United States. https://www.osti.gov/servlets/purl/1406473.
@article{osti_1406473,
title = {Charm semileptonic decays and |Vcs(d)| from heavy clover quarks and 2+1 flavor asqtad staggered ensembles},
author = {Bailey, Jon A. and Du, D. and El-Khadra, A. X. and Gottlieb, Steven and Jain, R. D. and Kronfeld, A. S. and Van de Water, R. S. and Zhou, R.},
abstractNote = {By combining experimentally measured partial branching fractions for the semileptonic decays D to K l nu and D to pi l nu with lattice calculations of the form factors f_+^{D to K}(q^2) and f_+^{D to pi}(q^2), one can extract the CKM matrix elements |V_{cs}| and |V_{cd}|. We are calculating the form factors by using Fermilab charm and asqtad staggered light and strange quarks on 2+1 flavor asqtad staggered ensembles generated by the MILC Collaboration. We vary the light valence quark masses from 0.4m_s to 0.05m_s (m_s is the strange sea-quark mass), and the lattice spacings, from about 0.12 fm to about 0.045 fm. We extrapolate to the physical light-quark mass and the continuum limit using heavy-light meson staggered chiral perturbation theory about the SU(2) and SU(3) limits, compare the resulting (preliminary) form factor shapes with experiment, and discuss our errors.},
doi = {},
journal = {PoS},
number = ,
volume = LATTICE2012,
place = {United States},
year = {2012},
month = {11}
}

Conference:
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