| 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 |
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|
タイトル |
Charmonium spectral functions with the variational method in zero and finite temperature lattice QCD |
|
言語 |
en |
| 作成者 |
Ohno, Hiroshi
Aoki, Sinya
Ejiri, Shinji
Kanaya, Kazuyuki
Maezawa, Yu
Saito, Hana
Umeda, Takashi
WHOT-QCD Collaboration
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| アクセス権 |
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|
アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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|
権利情報 |
(c) 2011 American Physical Society |
| 内容記述 |
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内容記述 |
We propose a method to evaluate spectral functions on the lattice based on a variational method. On a lattice with a finite spatial extent, spectral functions consist of discrete spectra only. Adopting a variational method, we calculate the locations and the heights of spectral functions at low-lying discrete spectra. We first test the method in the case of analytically solvable free Wilson quarks at zero and finite temperatures and confirm that the method well reproduces the analytic results for low-lying spectra. We find that we can systematically improve the results by increasing the number of trial states. We then apply the method to calculate the charmonium spectral functions for S and P-wave states at zero-temperature in quenched QCD and compare the results with those obtained using the conventional maximum entropy method (MEM). The results for the ground state are consistent with the location and the area of the first peak in spectral functions from the MEM, while the variational method leads to a mass which is closer to the experimental value for the first excited state. We also investigate the temperature dependence of the spectral functions for S-wave states below and above Tc. We obtain no clear evidences for dissociation of J/ψ and ηc up to 1.4Tc. |
|
言語 |
en |
| 出版者 |
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出版者 |
American Physical Society |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
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|
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 |
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|
出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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|
識別子タイプ |
DOI |
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関連識別子 |
10.1103/PhysRevD.84.094504 |
| 関連情報 |
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|
識別子タイプ |
DOI |
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関連識別子 |
http://dx.doi.org/10.1103/PhysRevD.84.094504 |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
1550-7998 |
| 収録物識別子 |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA00773624 |
| 開始ページ |
|
|
開始ページ |
094504-1 |
| 書誌情報 |
Physical Review D
Physical Review D
巻 84,
号 9,
p. 094504-1-094504-13,
発行日 2011
|
| 旧ID |
33881 |
PhysRevD.84.094504.pdf (2.0 MB)
