Department
Data Science
Document Type
Article
Publication Title
Physical Review Letters
ISSN
0031-9007
Volume
94
Issue
1
DOI
10.1103/PhysRevLett.94.01161
First Page
1
Last Page
4
Publication Date
1-1-2005
Abstract
We present the first three-flavor lattice QCD calculations for D-->pilnu and D-->Klnu semileptonic decays. Simulations are carried out using ensembles of unquenched gauge fields generated by the MILC Collaboration. With an improved staggered action for light quarks, we are able to simulate at light quark masses down to 1/8 of the strange mass. Consequently, the systematic error from the chiral extrapolation is much smaller than in previous calculations with Wilson-type light quarks. Our results for the form factors at q(2)=0 are f(D-->pi)(+)(0)=0.64(3)(6) and f(D-->K)(+)(0)=0.73(3)(7), where the first error is statistical and the second is systematic, added in quadrature. Combining our results with experimental branching ratios, we obtain the Cabibbo-Kobayashi-Maskawa matrix elements |V(cd)|=0.239(10)(24)(20) and |V(cs)|=0.969(39)(94)(24), where the last errors are from experimental uncertainties.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Hetrick, J. E.,
&
Aubin, C.
(2005).
Semileptonic decays of D mesons in three-flavor lattice QCD.
Physical Review Letters, 94(1), 1–4.
DOI: 10.1103/PhysRevLett.94.01161
https://scholarlycommons.pacific.edu/soecs-facarticles/167