| 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 spectroscopy in two-flavor QCD with small sea quark masses |
|
言語 |
en |
| 作成者 |
CP-PACS, Collaboration
Namekawa, Y
Aoki, S
Fukugita, M
Ishikawa, Kenichi
Ishizuka, N
Iwasaki, Y
Kanaya, K
Kaneko, T
Kuramashi, Y
Lesk, V. I.
Okawa, Masanori
Ukawa, A
Umeda, T
Yoshié, T
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| アクセス権 |
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アクセス権 |
open access |
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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) 2004 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 extend the study of the light hadron spectrum and the quark mass in two-flavor QCD to smaller sea quark mass, corresponding to mPS/mV=0.60–0.35. Numerical simulations are carried out using the RG-improved gauge action and the meanfield-improved clover quark action at beta=1.8 (a=0.2 fm from rho meson mass). We observe that the light hadron spectrum for small sea quark mass does not follow the expectation from chiral extrapolations with quadratic functions made from the region of mPS/mV=0.80–0.55. Whereas fits with either polynomial or continuum chiral perturbation theory (ChPT) fail, the Wilson ChPT (WChPT) that includes a2 effects associated with explicit chiral symmetry breaking successfully fits the whole data: In particular, WChPT correctly predicts the light quark mass spectrum from simulations for medium heavy quark mass, such as mPS/mV>~0.5. Reanalyzing the previous data with the use of WChPT, we find the mean up and down quark mass being smaller than the previous result from quadratic chiral extrapolation by approximately 10%, mudMS-bar(µ=2 GeV)=3.11(17) [MeV] in the continuum limit. |
|
言語 |
en |
| 出版者 |
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|
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 |
|
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.70.074503 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1550-7998 |
| 開始ページ |
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開始ページ |
074503 |
| 書誌情報 |
Physical Review D
Physical Review D
巻 70,
p. 074503,
発行日 2004
|
| 旧ID |
14577 |
70_074503APS.pdf (512.0 KB)
