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Nucleon strange quark content from N_f=2+1 lattice QCD with exact chiral symmetry
http://hdl.handle.net/2241/118868
http://hdl.handle.net/2241/11886853d259f9-6e9e-4046-ad98-11ffec91fb77
名前 / ファイル | ライセンス | アクション |
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PRD_87-3.pdf (503.9 kB)
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Item type | Journal Article(1) | |||||
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公開日 | 2013-04-17 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Nucleon strange quark content from N_f=2+1 lattice QCD with exact chiral symmetry | |||||
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 | |||||
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 | |||||
著者 |
Ohki, H.
× Ohki, H.× Takeda, K.× 青木, 愼也× Hashimoto, S.× Kaneko, T.× Matsufuru, H.× Noaki, J.× Onogi, T. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We calculate the strange quark content of the nucleon 〈N|s ̅s|N〉 in 2 + 1 -flavor lattice QCD. Chirally symmetric overlap fermion formulation is used to avoid the contamination from up and down quark contents due to an operator mixing between strange and light scalar operators, s ̅s and u ̅u + d ̅d . At a lattice spacing a=0.112(1) fm, we perform calculations at four values of degenerate up and down quark massesm_ud, which cover a range of the pion mass M_π≃300–540 MeV. We employ two different methods to calculate 〈N|s ̅s|N〉. One is a direct method where we calculate 〈N|s ̅s|N〉 by directly inserting the s ̅s operator. The other is an indirect method where 〈N|s ̅s|N〉 is extracted from a derivative of the nucleon mass in terms of the strange quark mass. With these two methods we obtain consistent results for 〈N|s ̅s|N〉 with each other. Our best estimate f_(t_s )=M_s 〈N|s ̅s|N〉/M_N=0.009〖(15)〗_stat 〖(16)〗_sys is in good agreement with our previous studies in two-flavor QCD. | |||||
言語 | en | |||||
書誌情報 |
en : Physical review D 巻 87, 号 3, p. 034509, 発行日 2013-02 |
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ISSN | ||||||
収録物識別子タイプ | PISSN | |||||
収録物識別子 | 2470-0010 | |||||
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 | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1103/PhysRevD.87.034509 | |||||
権利 | ||||||
言語 | en | |||||
権利情報 | (c) 2013 American Physical Society | |||||
出版タイプ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
言語 | en | |||||
出版者 | American Physical Society | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2241/118868 | |||||
識別子タイプ | HDL |