Charmed-Meson Decay Constants in Three-Flavor Lattice QCD
| Autor: | Carleton DeTar, Aida X. El-Khadra, Andreas S. Kronfeld, M. Di Pierro, F. Maresca, D. Menscher, Howard D. Trottier, Paul B. Mackenzie, Ludmila Levkova, M. Nobes, M. Okamoto, Steven Gottlieb, James Edward Hetrick, Urs M. Heller, Robert L. Sugar, Dru B. Renner, James N. Simone, C. Aubin, Claude Bernard, Elizabeth Freeland, D. Toussaint |
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| Rok vydání: | 2005 |
| Předmět: |
Quantum chromodynamics
Quark Physics Particle physics Meson High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) Nuclear Theory High Energy Physics::Phenomenology Lattice field theory FOS: Physical sciences General Physics and Astronomy Lattice QCD High Energy Physics - Phenomenology Strange matter High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Lattice Lattice (order) High Energy Physics::Experiment Exponential decay Nuclear Experiment |
| Zdroj: | Physical Review Letters. 95 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.95.122002 |
| Popis: | We present the first lattice QCD calculation with realistic sea quark content of the D^+ meson decay constant f_{D^+}. We use the MILC Collaboration's publicly available ensembles of lattice gauge fields, which have a quark sea with two flavors (up and down) much lighter than a third (strange). We obtain f_{D^+} = 201 +/- 3 +/- 17 MeV, where the errors are statistical and a combination of systematic errors. We also obtain f_{D_s} = 249 +/- 3 +/- 16 MeV for the D_s meson. note added on recent CLEO measurement; PRL version |
| Databáze: | OpenAIRE |
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