Spectral function and excited states in lattice QCD with the maximum entropy method
スポンサーリンク
概要
- 論文の詳細を見る
We apply the maximum entropy method to extract the spectral functions for pseudoscalar and vector mesons from hadron correlators previously calculated at four different lattice spacings in quenched QCD with the Wilson quark action. We determine masses and decay constants for the ground and excited states of the pseudoscalar and vector channels from the position and area of peaks in the spectral functions. We obtain the results mp1=660(590) MeV and mr 1=1540(570) MeV for the first excited state masses, in the continuum limit of quenched QCD. We also find unphysical states that have an infinite mass in the continuum limit, and argue that they are bound states of two doublers of the Wilson quark action. If the interpretation is correct, this is the first time that the state of doublers has been identified in lattice QCD numerical simulations.
- 2001-11-20
論文 | ランダム
- 学級特性といじめの発生 : 担任・クラスの雰囲気・特定の生徒(III-2部会 教育問題)
- いじめ問題の発見(III-1部会 教育問題)
- スウェーデンにおける選抜・配分過程(その1) : 高校進学にはたす基礎学校の機能(I-2部会 学校と進路分化)
- "いじめ"行為の発生要因に関する実証的研究
- 4 教師による体罰の研究(I-2部会 教師(1))