We present the first study of the charmonium spectrum using overlap fermions, on quenched configurations. Simulations are performed on 163 × 72 lattices, with Wilson gauge action at β = 6.3345. We demonstrate that we have discretization errors, as indicated by the dispersion relation, at about 5%. We obtain 88(4) MeV for the 1S hyperfine splitting using the r0 scale, and 121(6) MeV using the (1 over(P, ̄) - 1 over(S, ̄)) scale. This Letter should encourage the pursuit of using the same chiral fermions for both heavy and light quarks on the same lattice.
|Number of pages||6|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Jun 29 2006|
Bibliographical noteFunding Information:
This work is supported in part by the U.S. Department of Energy under grants DE-FG05-84ER40154 and DE-FG02-95ER40907. The computing resources at NERSC (operated by DOE under DE-AC03-76SF00098) are also acknowledged. Y. Chen and S.J. Dong are partly supported by NSFC (#10235040 and #10075107).
ASJC Scopus subject areas
- Nuclear and High Energy Physics