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Light hadron spectrum and quark masses from quenched lattice QCD

https://hiroshima.repo.nii.ac.jp/records/2008369
https://hiroshima.repo.nii.ac.jp/records/2008369
76d53e20-9cfb-419c-9c37-c088cbb23da6
名前 / ファイル ライセンス アクション
034503APS.pdf 034503APS.pdf (584.4 KB)
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
タイトル Light hadron spectrum and quark masses from quenched lattice QCD
言語 en
作成者 CP-PACS, Collaboration

× CP-PACS, Collaboration

en CP-PACS, Collaboration

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Aoki, S

× Aoki, S

en Aoki, S

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Boyd, G

× Boyd, G

en Boyd, G

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Burkhalter, R

× Burkhalter, R

en Burkhalter, R

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Ejiri, S

× Ejiri, S

en Ejiri, S

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Fukugita, M

× Fukugita, M

en Fukugita, M

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Hashimoto, S

× Hashimoto, S

en Hashimoto, S

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Iwasaki, Y

× Iwasaki, Y

en Iwasaki, Y

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Kanaya, K

× Kanaya, K

en Kanaya, K

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Kaneko, T

× Kaneko, T

en Kaneko, T

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Kuramashi, Y

× Kuramashi, Y

en Kuramashi, Y

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Nagai, K

× Nagai, K

en Nagai, K

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Okawa, Masanori

× Okawa, Masanori

en Okawa, Masanori

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Shanahan, H. P.

× Shanahan, H. P.

en Shanahan, H. P.

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Ukawa, A

× Ukawa, A

en Ukawa, A

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Yoshié, T

× Yoshié, T

en Yoshié, T

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アクセス権
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
権利情報 Copyright (c) 2003 The American Physical Society
主題
主題Scheme NDC
主題 420
内容記述
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
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
関連情報
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 http://dx.doi.org/10.1103/PhysRevD.67.034503
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 1550-7998
開始ページ
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
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