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  1. 050 理学部
  2. 40 学会発表資料
  3. 99 その他学会発表資料
  1. 0 資料タイプ別
  2. 04 会議発表論文

An application of the variational analysis to calculate the meson spectral functions

http://hdl.handle.net/10191/27695
http://hdl.handle.net/10191/27695
9449c16d-a8a3-4090-87ab-5ccc66cd953c
名前 / ファイル ライセンス アクション
Lattice Lattice 2010_209.pdf (128.9 kB)
Item type 会議発表論文 / Conference Paper(1)
公開日 2014-06-23
タイトル
タイトル An application of the variational analysis to calculate the meson spectral functions
タイトル
言語 en
タイトル An application of the variational analysis to calculate the meson spectral functions
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_5794
タイプ conference paper
著者 Ohno, H.

× Ohno, H.

WEKO 169219

Ohno, H.

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Aoki, S.

× Aoki, S.

WEKO 169220

Aoki, S.

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Kanaya, K.

× Kanaya, K.

WEKO 169221

Kanaya, K.

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Saito, H.

× Saito, H.

WEKO 169222

Saito, H.

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Ejiri, S.

× Ejiri, S.

WEKO 169223

Ejiri, S.

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Maezawa, Y.

× Maezawa, Y.

WEKO 169224

Maezawa, Y.

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Umeda, T.

× Umeda, T.

WEKO 169225

Umeda, T.

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WHOT-QCD, Collaboration

× WHOT-QCD, Collaboration

WEKO 169226

WHOT-QCD, Collaboration

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抄録
内容記述タイプ Abstract
内容記述 We present a new method to calculate meson spectral functions (SPFs) on the lattice based on a variational method. Because, on a finite volume lattice, the meson SPFs have discrete spectra only, a suitable way to extract such discrete signals is needed. Using a variational method, we can calculate several discrete quantities such as the position and the area of spectral peaks for low-lying states. Moreover data accuracy can be improved by increasing the number of basis functions. In this report, we first confirm our method in the free quark case and show that our method works well. Then, we apply the method to a quenched lattice QCD simulation and calculate the charmonium SPFs for S and P-waves at zero temperature. Our results for the ground state are well consistent with the position and the area of the lowest peaks of charmonium SPFs calculated by the conventional maximum entropy method. For first excited states, the signals may be reliablly extracted with our method because the charmonium mass converges to a value close to the experimental one when the number of basis functions is increased. We also investigate the SPFs for S-wave charmonia at below and above Tc. Our results suggest that J/y and hc may survive up to 1.4Tc.
内容記述
内容記述タイプ Other
内容記述 The XXVIII Internaitonal Symposium on Lattice Field Theory, Lattice2010 July 14-19, 2010 Villasimius, Italy
書誌情報 PoS - Proceedings of Science
en : PoS - Proceedings of Science

巻 Lattice2010, 号 209, p. 1-7, 発行日 2010-07
出版者
出版者 SISSA
ISSN
収録物識別子タイプ ISSN
収録物識別子 18248039
権利
権利情報 © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
著者版フラグ
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