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  1. 020 教育学部
  2. 10 学術雑誌論文
  3. 10 査読済論文
  1. 0 資料タイプ別
  2. 01 学術雑誌論文

Pentaquark baryon in anisotropic lattice QCD

http://hdl.handle.net/10191/30869
http://hdl.handle.net/10191/30869
e376b218-032d-4186-803c-2a154c207671
名前 / ファイル ライセンス アクション
71_034001_1-11.pdf 71_034001_1-11.pdf (191.9 kB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2014-12-05
タイトル
タイトル Pentaquark baryon in anisotropic lattice QCD
タイトル
言語 en
タイトル Pentaquark baryon in anisotropic lattice QCD
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
著者 Ishii, N.

× Ishii, N.

WEKO 14308

Ishii, N.

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Doi, T.

× Doi, T.

WEKO 14309

Doi, T.

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Iida, H.

× Iida, H.

WEKO 14310

Iida, H.

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Okiharu, F.

× Okiharu, F.

WEKO 14311

Okiharu, F.

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著者別名
識別子 14312
識別子Scheme WEKO
姓名 興治, 文子
著者別名
識別子 14313
識別子Scheme WEKO
姓名 Okiharu, Fumiko
抄録
内容記述タイプ Abstract
内容記述 The pentaquark (5Q) baryon is studied in anisotropic quenched lattice QCD with renormalized anisotropy as/at=4 for a high-precision mass measurement. The standard Wilson action at β=5.75 and the O(a) improved Wilson quark action with κ=0.1210(0.0010)0.1240 are employed on a 123×96 lattice. Contribution of excited states is suppressed by using a smeared source. We investigate both the positive- and negative-parity 5Q baryons with I=0 and spin J=1/2 using a non-NK-type interpolating field. After chiral extrapolation, the lowest positive-parity state is found to have a mass, m5Q=2.25  GeV, which is much heavier than the experimentally observed Θ+(1540). The lowest negative-parity 5Q state appears at m5Q=1.75  GeV, which is near the s-wave NK threshold. To distinguish spatially-localized 5Q resonances from NK-scattering states, we propose a new general method imposing a “Hybrid Boundary Condition (HBC),” where the NK threshold is artificially raised without affecting compact five-quark states. The study using the HBC method shows that the negative-parity state observed on the lattice is not a compact 5Q state but an s-wave NK-scattering state.
書誌情報 Physical Review D
en : Physical Review D

巻 71, 号 034001, p. 1-11, 発行日 2005-02
出版者
出版者 American Physical Society
ISSN
収録物識別子タイプ ISSN
収録物識別子 15507998
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
識別子タイプ DOI
関連識別子 info:doi/10.1103/PhysRevD.71.034001
権利
権利情報 Copyright(C)2005 The American Physical Society
著者版フラグ
値 publisher
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