Phys. Rev. Lett. 95, 122002 (2005) [5 pages]

Charmed-Meson Decay Constants in Three-Flavor Lattice QCD

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C. Aubin1, C. Bernard2, C. DeTar3, M. Di Pierro4, E. D. Freeland5, Steven Gottlieb6, U. M. Heller7, J. E. Hetrick8, A. X. El-Khadra9, A. S. Kronfeld10, L. Levkova6, P. B. Mackenzie10, D. Menscher9, F. Maresca3, M. Nobes11, M. Okamoto10, D. Renner12, J. Simone10, R. Sugar13, D. Toussaint12, and H. D. Trottier14 (Fermilab Lattice, MILC, and HPQCD Collaborations)
1Physics Department, Columbia University, New York, New York 10027, USA
2Department of Physics, Washington University, St. Louis, Missouri 63130, USA
3Physics Department, University of Utah, Salt Lake City, Utah 84112, USA
4School of Computer Science, Telecommunications and Information Systems, DePaul University, Chicago, Illinois 60604, USA
5Liberal Arts Department, The School of the Art Institute of Chicago, Chicago, Illinois 60603, USA
6Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
7American Physical Society, Ridge, New York 11961, USA
8Physics Department, University of the Pacific, Stockton, California 95211, USA
9Physics Department, University of Illinois, Urbana, Illinois 61801, USA
10Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
11Laboratory of Elementary-Particle Physics, Cornell University, Ithaca, New York 14853, USA
12Department of Physics, University of Arizona, Tucson, Arizona 85721, USA
13Department of Physics, University of California, Santa Barbara, California 93106, USA
14Physics Department, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6

Received 28 June 2005; published 14 September 2005

We present the first lattice QCD calculation with realistic sea quark content of the D+-meson decay constant fD+. 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 fD+=201±3±17  MeV, where the errors are statistical and a combination of systematic errors. We also obtain fDs=249±3±16  MeV for the Ds meson.


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.95.122002
DOI: 10.1103/PhysRevLett.95.122002
PACS: 12.38.Gc, 13.20.Fc

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