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Pentaquark baryon in anisotropic lattice QCD
http://hdl.handle.net/10191/24843
http://hdl.handle.net/10191/2484372ed934c-24e3-4c6a-b1fe-fc1988b3c75f
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
034001.pdf (191.9 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-01-28 | |||||
| タイトル | ||||||
| タイトル | Pentaquark baryon in anisotropic lattice QCD | |||||
| タイトル | ||||||
| タイトル | Pentaquark baryon in anisotropic lattice QCD | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Okiharu, Fumiko | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | 興治, 文子 | |||||
| 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.× Doi, T.× Iida, H.× Oka, M.× Okiharu, F.× Suganuma, H. |
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| 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 a_s/a_t = 4 for a high-precision mass measurement. The standard Wilson action at β= 5.75 and the O (a) improved Wilson quark action with k = 0.1210(0.0010)0.1240 are employed on a 12^3 × 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, m_<5Q> = 2.25 GeV, which is much heavier than the experimentally observed Θ^+ (1540). The lowest negative-parity 5Q state appears at m_<5Q> = 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 |
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| 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: The American Physical Society | |||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
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Cite as
Ishii, N., Doi, T., Iida, H., Oka, M., Okiharu, F., Suganuma, H., 2005, Pentaquark baryon in anisotropic lattice QCD: American Physical Society, 1–11 p.
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