Precise Charm to Strange Mass Ratio and Light Quark Masses from Full Lattice QCD

C. T. H. Davies, C. McNeile, K. Y. Wong, E. Follana, R. Horgan, K. Hornbostel, G. P. Lepage, J. Shigemitsu, and H. Trottier (HPQCD Collaboration)
Phys. Rev. Lett. 104, 132003 – Published 31 March 2010

Abstract

By using a single formalism to handle charm, strange, and light valence quarks in full lattice QCD for the first time, we are able to determine ratios of quark masses to 1%. For mc/ms we obtain 11.85(16), an order of magnitude more precise than the current PDG average. Combined with 1% determinations of the charm quark mass now possible this gives m¯s(2GeV)=92.4(1.5)MeV. The MILC result for ms/ml=27.2(3) yields m¯l(2GeV)=3.40(7)MeV for the average of u and d quark masses.

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  • Received 19 October 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.132003

©2010 American Physical Society

Authors & Affiliations

C. T. H. Davies1,*, C. McNeile1, K. Y. Wong1, E. Follana2, R. Horgan3, K. Hornbostel4, G. P. Lepage5, J. Shigemitsu6, and H. Trottier7 (HPQCD Collaboration)

  • 1Department of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
  • 2Departamento de Física Teórica, Universidad de Zaragoza, E-50009 Zaragoza, Spain
  • 3DAMTP, Cambridge University, Wilberforce Road, Cambridge, CB3 0WA, United Kingdom
  • 4Southern Methodist University, Dallas, Texas 75275, USA
  • 5Laboratory of Elementary-Particle Physics, Cornell University, Ithaca, New York 14853, USA
  • 6Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA
  • 7Physics Department, Simon Fraser University, Vancouver, BC, Canada

  • *c.davies@physics.gla.ac.uk
  • URL: http://www.physics.gla.ac.uk/HPQCD

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Issue

Vol. 104, Iss. 13 — 2 April 2010

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