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  1. 050 理学部
  2. 10 学術雑誌論文
  3. 10 査読済論文
  1. 0 資料タイプ別
  2. 01 学術雑誌論文

Charmonium spectrum from quenched anisotropic lattice QCD

http://hdl.handle.net/10191/27641
1376bb45-1049-473f-b390-65b32c43b643
名前 / ファイル ライセンス アクション
65_9_094508.pdf 65_9_094508.pdf (2.5 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2014-06-23
タイトル
タイトル Charmonium spectrum from quenched anisotropic lattice QCD
タイトル
言語 en
タイトル Charmonium spectrum from quenched anisotropic lattice QCD
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Okamoto, M.

× Okamoto, M.

WEKO 18053

Okamoto, M.

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Aoki, S.

× Aoki, S.

WEKO 18054

Aoki, S.

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Burkhalter, R.

× Burkhalter, R.

WEKO 18055

Burkhalter, R.

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Ejiri, S.

× Ejiri, S.

WEKO 18056

Ejiri, S.

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Fukugita, M.

× Fukugita, M.

WEKO 18057

Fukugita, M.

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Hashimoto, S.

× Hashimoto, S.

WEKO 18058

Hashimoto, S.

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Ishikawa, K-I

× Ishikawa, K-I

WEKO 18059

Ishikawa, K-I

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Ishizuka, N.

× Ishizuka, N.

WEKO 18060

Ishizuka, N.

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Iwasaki, Y.

× Iwasaki, Y.

WEKO 18061

Iwasaki, Y.

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Kanaya, K.

× Kanaya, K.

WEKO 18062

Kanaya, K.

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Kaneko, T.

× Kaneko, T.

WEKO 18063

Kaneko, T.

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Kuramashi, Y.

× Kuramashi, Y.

WEKO 18064

Kuramashi, Y.

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Lesk, V.

× Lesk, V.

WEKO 18065

Lesk, V.

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Nagai, K.I.

× Nagai, K.I.

WEKO 18066

Nagai, K.I.

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Okawa, M.

× Okawa, M.

WEKO 18067

Okawa, M.

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Taniguchi, Y.

× Taniguchi, Y.

WEKO 18068

Taniguchi, Y.

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Ukawa, A.

× Ukawa, A.

WEKO 18069

Ukawa, A.

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Yoshie, T.

× Yoshie, T.

WEKO 18070

Yoshie, T.

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CP-PACS, Collaboration

× CP-PACS, Collaboration

WEKO 18071

CP-PACS, Collaboration

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抄録
内容記述タイプ Abstract
内容記述 We present a detailed study of the charmonium spectrum using anisotropic lattice QCD. We first derive a tree-level improved clover quark action on the anisotropic lattice for arbitrary quark mass by matching the Hamiltonian on the lattice and in the continuum. The heavy quark mass dependence of the improvement coefficients, i.e., the ratio of the hopping parameters ζ=K t /K s and the clover coefficients c s,t , is examined at the tree level, and effects of the choice of the spatial Wilson parameter r s are discussed. We then compute the charmonium spectrum in the quenched approximation employing ξ=a s /a t =3 anisotropic lattices. Simulations are made with the standard anisotropic gauge action and the anisotropic clover quark action with r s =1 at four lattice spacings in the range a s =0.07–0.2 fm. The clover coefficients c s,t are estimated from tree-level tadpole improvement. On the other hand, for the ratio of the hopping parameters ζ, we adopt both the tree-level tadpole-improved value and a non-perturbative one. The latter employs the condition that the speed of light calculated from the meson energy-momentum relation be unity. We calculate the spectrum of S and P states and their excitations using both the pole and kinetic masses. We find that the combination of the pole mass and the tadpole-improved value of ζ to yield the smoothest approach to the continuum limit, which we then adopt for the continuum extrapolation of the spectrum. The results largely depend on the scale input even in the continuum limit, showing a quenching effect. When the lattice spacing is determined from the 1P−1S splitting, the deviation from the experimental value is estimated to be ∼30% for the S-state hyperfine splitting and ∼20% for the P-state fine structure. Our results are consistent with previous results at ξ=2 obtained by Chen when the lattice spacing is determined from the Sommer scale r 0 . We also address the problem with the hyperfine splitting that different choices of the clover coefficients lead to disagreeing results in the continuum limit. Making a leading order analysis based on potential models we show that a large hyperfine splitting ∼95 MeV obtained by Klassen with a different choice of the clover coefficients is likely an overestimate.
書誌情報 Physical Review D
en : Physical Review D

巻 65, 号 9, p. 094508, 発行日 2002-04
出版者
出版者 American Physical Society
ISSN
収録物識別子タイプ ISSN
収録物識別子 15507998
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA00773624
DOI
関連識別子
識別子タイプ DOI
関連識別子 info:doi/10.1103/PhysRevD.65.094508
権利
権利情報 (C) 2002 American Physical Society
著者版フラグ
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