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Viscosities of Hot Gluon : A Lattice QCD Study
https://hiroshima.repo.nii.ac.jp/records/2007813
https://hiroshima.repo.nii.ac.jp/records/200781305fba8a2-5dd2-44d1-b756-2c00c4b99c95
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
NuclPhysA_774_775.pdf (108.2 KB)
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| 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 | ||||||||||
| タイトル | Viscosities of Hot Gluon : A Lattice QCD Study | |||||||||
| 言語 | en | |||||||||
| 作成者 |
Nakamura, Atsushi
× Nakamura, Atsushi
× Sakai, S.
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| 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 | |||||||||
| 権利情報 | ||||||||||
| 権利情報 | Copyright (c) 2006 Elsevier B.V. | |||||||||
| 主題 | ||||||||||
| 主題Scheme | NDC | |||||||||
| 主題 | 420 | |||||||||
| 内容記述 | ||||||||||
| 内容記述 | We present transport coefficients (shear viscosity, η, and bulk viscosity, ζ) for the gluon system obtained by the lattice QCD. This is an indispensable calculation towards the understanding of "New State of Matter" observed in RHIC. We study the temperature regions of RHIC (1.4 ≤ T / Tc ≤ 1.8) and much higher ones up to T / Tc ~ 20. In RHIC regions, the ratio of shear viscosity to entropy density, η / s, is around ~ 0.1 - 0.4, and satisfies the KSS bound. At high temperature, η becomes two or three oder of magnitude larger. Our calculation has two limitations: (i) the use of the quench approximation, i.e., without quark pair creation-annihilation effects on vacuum, and (ii) the use of an ansatz for the spectral function. The first point has been well studied in calculations of the spectroscopy and the phase-transition behavior. To investigate the second point, we compare our results with perturbative calculations in high T-regions, and also check the effects of the modification of the spectral function on the viscosity. | |||||||||
| 言語 | en | |||||||||
| 出版者 | ||||||||||
| 出版者 | Elsevier B.V. | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 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 | ||||||||||
| 出版タイプ | AO | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_b1a7d7d4d402bcce | |||||||||
| 関連情報 | ||||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | 10.1016/j.nuclphysa.2006.06.134 | |||||||||
| 関連情報 | ||||||||||
| 識別子タイプ | DOI | |||||||||
| 関連識別子 | http://dx.doi.org/10.1016/j.nuclphysa.2006.06.134 | |||||||||
| 収録物識別子 | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 0375-9474 | |||||||||
| 収録物識別子 | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AA00760032 | |||||||||
| 開始ページ | ||||||||||
| 開始ページ | 775 | |||||||||
| 書誌情報 |
Nuclear Physics A Nuclear Physics A 巻 774, 号 1-4, p. 775-778, 発行日 2006-08 |
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| 旧ID | 23365 | |||||||||
