Charmonium spectrum from quenched QCD with overlap fermions

S. Tamhankar; A. Alexandru; Y. Chen; S. J. Dong; T. Draper; I. Horváth; F. X. Lee; K. F. Liu; N. Mathur; J. B. Zhang

doi:10.1016/j.physletb.2006.04.055

Charmonium spectrum from quenched QCD with overlap fermions

S. Tamhankar, A. Alexandru, Y. Chen, S. J. Dong, T. Draper, I. Horváth, F. X. Lee, K. F. Liu, N. Mathur, J. B. Zhang

Physics And Astronomy

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6 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	55-60
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	638
Issue number	1
DOIs	https://doi.org/10.1016/j.physletb.2006.04.055
State	Published - Jun 29 2006

Bibliographical note

Funding 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

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10.1016/j.physletb.2006.04.055

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title = "Charmonium spectrum from quenched QCD with overlap fermions",

abstract = "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.",

author = "S. Tamhankar and A. Alexandru and Y. Chen and Dong, {S. J.} and T. Draper and I. Horv{\'a}th and Lee, {F. X.} and Liu, {K. F.} and N. Mathur and Zhang, {J. B.}",

note = "Funding 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).",

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doi = "10.1016/j.physletb.2006.04.055",

language = "English",

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T1 - Charmonium spectrum from quenched QCD with overlap fermions

AU - Tamhankar, S.

AU - Alexandru, A.

AU - Chen, Y.

AU - Dong, S. J.

AU - Draper, T.

AU - Horváth, I.

AU - Lee, F. X.

AU - Liu, K. F.

AU - Mathur, N.

AU - Zhang, J. B.

N1 - Funding 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).

PY - 2006/6/29

Y1 - 2006/6/29

N2 - 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.

AB - 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.

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EP - 60

IS - 1

ER -

Charmonium spectrum from quenched QCD with overlap fermions

Abstract

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