TY - JOUR
T1 - Charmed and light pseudoscalar meson decay constants from HISQ simulations
AU - Fermilab Lattice and MILC Collaborations
AU - Bazavov, A.
AU - Bernard, C.
AU - Bouchard, C.
AU - Detar, C.
AU - Du, D.
AU - El-Khadra, A. X.
AU - Foley, J.
AU - Freeland, E. D.
AU - Gámiz, E.
AU - Gottlieb, Steven
AU - Heller, U. M.
AU - Kim, J.
AU - Komijani, J.
AU - Kronfeldl, A. S.
AU - Laiho, J.
AU - Levkovad, L.
AU - Mackenzie, P. B.
AU - Neil, E. T.
AU - Simone, J. N.
AU - Sugar, R. L.
AU - Toussaint, D.
AU - Van De Water, S.
AU - Zhoul, R.
N1 - Funding Information:
This work was supported by the U.S. Department of Energy and National Science Foundation, by the URA Visiting Scholars’ program (A.E-K.), and by the MINECO, Junta de Andalucía, and European Commission. Computation for this work was done at the Argonne Leadership Computing Facility (ALCF), the National Center for Atmospheric Research (UCAR), Bluewaters at the National Center for Supercomputing Applications (NCSA), the National Energy Resources Supercomputing Center (NERSC), the National Institute for Computational Sciences (NICS), the Texas Advanced Computing Center (TACC), and the USQCD facilities at Fermilab, under grants from the NSF and DOE.
Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
PY - 2014
Y1 - 2014
N2 - We compute the leptonic decay constants fD+, fDs, and fK+, and the quark-mass ratios mc/ms and ms/ml in unquenched lattice QCD. We use the MILC highly improved staggered quark (HISQ) ensembles with four dynamical quark flavors. Our primary results are fd+ = 212.6(0.4)(+1.0 -1.2) MeV, fDs = 249.0(0.3)(+1.1 1. 5) MeV, and fDs/fD+ = 1.1712(10)(+-29 -32), where the errors are statistical and total systematic, respectively. We also obtain fK+/fπ+ = 1.1956(10) (+-26 -18), updating our previous result, and determine the quark-mass ratios ms/ml = 27.35(5)(+10 -7) and mc/ms = 11.747(19)(+59 -43). When combined with experimental measurements of the decay rates, our results lead to precise determinations of the CKM matrix elements |Vus| = 0.22487(51)(29)(20)(5), |Vcd| = 0.217(1)(5)(1) and |Vcs| = 1.010(5)(18)(6), where the errors are from this calculation of the decay constants, the uncertainty in the experimental decay rates, structure-dependent electromagnetic corrections, and, in the case of |Vus|, the uncertainty in |Vud|, respectively.
AB - We compute the leptonic decay constants fD+, fDs, and fK+, and the quark-mass ratios mc/ms and ms/ml in unquenched lattice QCD. We use the MILC highly improved staggered quark (HISQ) ensembles with four dynamical quark flavors. Our primary results are fd+ = 212.6(0.4)(+1.0 -1.2) MeV, fDs = 249.0(0.3)(+1.1 1. 5) MeV, and fDs/fD+ = 1.1712(10)(+-29 -32), where the errors are statistical and total systematic, respectively. We also obtain fK+/fπ+ = 1.1956(10) (+-26 -18), updating our previous result, and determine the quark-mass ratios ms/ml = 27.35(5)(+10 -7) and mc/ms = 11.747(19)(+59 -43). When combined with experimental measurements of the decay rates, our results lead to precise determinations of the CKM matrix elements |Vus| = 0.22487(51)(29)(20)(5), |Vcd| = 0.217(1)(5)(1) and |Vcs| = 1.010(5)(18)(6), where the errors are from this calculation of the decay constants, the uncertainty in the experimental decay rates, structure-dependent electromagnetic corrections, and, in the case of |Vus|, the uncertainty in |Vud|, respectively.
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M3 - Conference article
AN - SCOPUS:85030099940
SN - 1824-8039
VL - Part F130500
JO - Proceedings of Science
JF - Proceedings of Science
M1 - 382
T2 - 32nd International Symposium on Lattice Field Theory, LATTICE 2014
Y2 - 23 June 2014 through 28 June 2014
ER -