| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
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|
タイトル |
Light hadron spectrum and quark masses from quenched lattice QCD |
|
言語 |
en |
| 作成者 |
CP-PACS, Collaboration
Aoki, S
Boyd, G
Burkhalter, R
Ejiri, S
Fukugita, M
Hashimoto, S
Iwasaki, Y
Kanaya, K
Kaneko, T
Kuramashi, Y
Nagai, K
Okawa, Masanori
Shanahan, H. P.
Ukawa, A
Yoshié, T
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| アクセス権 |
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アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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|
権利情報 |
Copyright (c) 2003 The American Physical Society |
| 主題 |
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|
主題Scheme |
NDC |
|
主題 |
420 |
| 内容記述 |
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|
内容記述 |
We present the details of simulations for the light hadron spectrum in quenched QCD carried out on the CP-PACS parallel computer. Simulations are made with the Wilson quark action and the plaquette gauge action on lattices of size 323×56–643×112 at four values of lattice spacings in the range a[approximate]0.1–0.05 fm and spatial extent Lsa[approximate]3 fm. Hadronic observables are calculated at five quark masses corresponding to mPS/mV[approximate]0.75–0.4, assuming the u and d quarks are degenerate, but treating the s quark separately. We find that the presence of quenched chiral singularities is supported from an analysis of the pseudoscalar meson data. The physical values of hadron masses are determined using mpi, mrho, and mK (or mphi) as input to fix the physical scale of lattice spacing and the u, d, and s quark masses. After chiral and continuum extrapolations, the agreement of the calculated mass spectrum with experiment is at a 10-1.985214e+00vel. In comparison with the statistical accuracy of 1%–3 0x000000084d19p-1022nd systematic errors of at most 1.7% we have achieved, this demonstrates a failure of the quenched approximation for the hadron spectrum: the hyperfine splitting in the meson sector is too small, and in the baryon sector the octet masses and mass splitting of the decuplet are both smaller than experiment. Light quark masses are calculated using two definitions: the conventional one and the one based on the axial-vector Ward identity. The two results converge toward the continuum limit, yielding mud=4.29(14)-0.79+0.51 MeV where the first error is statistical and the second one is systematic due to chiral extrapolation. The s quark mass depends on the strange hadron mass chosen for input: ms=113.8(2.3)-2.9+5.8 MeV from mK and ms=142.3(5.8)-0+22.0 MeV from mphi, indicating again a failure of the quenched approximation. We obtain the scale of QCD, Lambda[overline MS](0)=219.5(5.4) MeV with mrho used as input. An O(10%) deviation from experiment is observed in the pseudoscalar |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
The American Physical Society |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版タイプ |
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|
出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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|
関連タイプ |
isVersionOf |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
http://dx.doi.org/10.1103/PhysRevD.67.034503 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
1550-7998 |
| 開始ページ |
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|
開始ページ |
034503 |
| 書誌情報 |
Physical Review D
Physical Review D
巻 67,
p. 034503,
発行日 2003
|
| 旧ID |
14581 |
034503APS.pdf (584.4 KB)
