Charm spectroscopy on dynamical 2+1 flavor domain wall fermion lattices with a relativistic.pdf

a r X i v : 0 7 1 0 .0 9 1 0 v 1 [ h e p - l a t ] 4 O c t 2 0 0 7 Charm spectroscopy on dynamical 2+1 flavor domain wall fermion lattices with a relativistic heavy quark action Min Li ? Department of Physics, Columbia University, New York, NY 10027, USA E-mail: minxolee@ Huey-Wen Lin Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA E-mail: hwlin@ RBC and UKQCD collaborations We present a preliminary calculation of the charmonium spectrum using the dynamical 2+1 fla- vor 24 3 × 64 domain wall fermion lattice configurations generated by the RBC and UKQCD collaborations. We use the relativistic heavy quark action with 3 parameters non-perturbatively determined by matching to experimental quantities. Chiral extrapolation is done on four light sea quark masses from 0.005 to 0.03, with ms=0.04 and mres=0.003. We can either predict meson masses assuming the lattice spacing is known from other methods, or calculate the lattice spacing using those quantities. The XXV International Symposium on Lattice Field Theory July 30 - August 4 2007 Regensburg, Germany ? Speaker. c? Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. http://pos.sissa.it/ Charm spectroscopy on dynamical 2+1f DWF lattices with a RHQ action Min Li 1. Introduction Flavor physics is one of the urgent applications of Lattice QCD. However, the fact that the heavy quark masses are large in lattice units is a long-standing problem for heavy quark physics with LQCD. In the application, ma ? 1 is no longer true and the terms containing (ma)n (with a the lattice spacing) become significant. As a direct simulation with a ? 1/m costs too much, we resort to effective field theories. Various heavy quark effective actions were developed and used for different physical systems, see Refs. [1, 2, 3, 4] for reviews on this topic. In this proceeding, our work is based on the so called relativistic heavy quark (RHQ) action [