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Scattering lengths for two pseudoscalar meson systems
http://hdl.handle.net/2241/121337
http://hdl.handle.net/2241/1213376bb50c0d-35e5-4b51-98b7-d1ac812c1289
名前 / ファイル | ライセンス | アクション |
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PRD_89-5.pdf (1.6 MB)
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Item type | Journal Article(1) | |||||||
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公開日 | 2014-05-01 | |||||||
タイトル | ||||||||
言語 | en | |||||||
タイトル | Scattering lengths for two pseudoscalar meson systems | |||||||
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 |
Sasaki, Kiyoshi
× Sasaki, Kiyoshi× 石塚, 成人× Oka, Makoto× Yamazaki, Takeshi× PACS-CS Collaboration
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抄録 | ||||||||
内容記述タイプ | Abstract | |||||||
内容記述 | Scattering lengths for two pseudoscalar meson systems, ππ(I=2), KK(I=1) and πK(I= 3/2, 1/2), are calculated from lattice QCD by using the finite size formula. We perform the calculation with N_f=2+1 gauge configurations generated on 32^3 × 64 lattice using the Iwasaki gauge action and a nonperturbatively O(a)-improved Wilson action at a^(-1)=2.19 GeV. The quark masses correspond to m_π=0.17–0.71 GeV. For the πK(I=1/2) system, we use the variational method with the two operators, s ̅u and πK, to separate the contamination from the higher states. In order to obtain the scattering length at the physical quark mass, we fit our results at several quark masses with the formula of the O(p^4) chiral perturbation theory and that includes the effects of the discretization error from the Wilson fermion, Wilson chiral perturbation theory. We found that the mass dependence of our results near m_π=0.17 GeV are described well by Wilson chiral perturbation theory but not by chiral perturbation theory. The scattering lengths at the physical point are given as a_0^((2)) m_π=−0.04263(22)(41), a_0^((1)) m_K=−0.310(17)(32), a_0^((3/2)) μ_πK=−0.0469(24)(20), and a_0^((1/2)) μ_πK=0.142(14)(27). Possible systematic errors are also discussed. | |||||||
言語 | en | |||||||
書誌情報 |
en : Physical review D 巻 89, 号 5, p. 054502, 発行日 2014-03 |
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ISSN | ||||||||
収録物識別子タイプ | PISSN | |||||||
収録物識別子 | 2470-0010 | |||||||
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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.89.054502 | |||||||
権利 | ||||||||
言語 | en | |||||||
権利情報 | (c) 2014 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/2241/121337 | |||||||
識別子タイプ | HDL |