Publication Type |
Journal Article |
School or College |
College of Science |
Department |
Physics |
Creator |
DeTar, Carleton |
Other Author |
Aubin, C.; Bernard, C.; Di Pierro, M.; El-Khadra, A.; Gottlieb, Steven; Gregory, E. B.; Heller, U. M.; Hetrick, J. E.; Kronfeld, A. S.; MacKenzie, P. B.; Menscher, D.; Nobes, M.; Okamoto, M.; Oktay, M. B.; Osborn, J.; Simone, J.; Sugar, R.; Toussaint, D.; Trottier, H. D. |
Title |
Semileptonic decays of D mesons in three-flavor lattice QCD |
Date |
2005-01 |
Description |
We present the first three-flavor lattice QCD calculations for D→ rrlv and D→ Klv 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 q2 = 0 are fD→rr(0)= 0:64(3)(6) and fD→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 [Vcd] = 0:239(10)(24)(20) and [Vcs]= 0.969(39)(94)(24), where the last errors are from experimental uncertainties. |
Type |
Text |
Publisher |
American Physical Society |
Journal Title |
Physical Review Letters |
Volume |
94 |
Issue |
1 |
DOI |
10.1103/PhysRevLett.94.011601 |
citatation_issn |
0031-9007 |
Subject |
Semileptonic decay; Staggered quarks |
Subject LCSH |
Quantum chromodynamics; Lattice gauge theories; Particles (Nuclear physics); Quarks -- Decay; Mesons -- Decay |
Language |
eng |
Bibliographic Citation |
Aubin, C., Bernard, C., DeTar, C., Di Pierro, M., El-Khadra, A., Gottlieb, S., Gregory, E. B., Heller, U.M., Hetrick, J., Kronfeld, A. S., Mackenzie, P. B., Menscher, D., Nobes, M., Okamoto, M., Oktay, M. B., Osborn, J., Simone, J., Sugar, R., Toussaint, D., & Trottier, H. D. (2005). Semileptonic decays of D mesons in three-flavor lattice QCD. Physical Review Letters, 94(1), 011601. |
Rights Management |
(c) American Physical Society http://dx.doi.org/10.1103/PhysRevLett.94.011601 |
Format Medium |
application/pdf |
Format Extent |
129,484 bytes |
Identifier |
ir-main,10261 |
ARK |
ark:/87278/s6sn0tj9 |
Setname |
ir_uspace |
ID |
706619 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6sn0tj9 |