I = 2 ππ scattering phase shift from the HAL QCD method with the LapH smearing

DOI DOI 機関リポジトリ (HANDLE) PDF 被引用文献6件 参考文献60件 オープンアクセス

書誌事項

タイトル別名
  • Ι = 2ππ scattering phase shift from the HAL QCD method with the LapH smearing

この論文をさがす

説明

Physical observables, such as the scattering phase shifts and binding energy, calculated from the non-local HAL QCD potential do not depend on the sink operators used to define the potential. In practical applications, the derivative expansion of the non-local potential is employed, so that physical observables may receive some scheme dependence at a given order of the expansion. In this paper, we compare the Ι=2ππ scattering phase shifts obtained in the point-sink scheme (the standard scheme in the HAL QCD method) and the smeared-sink scheme (the LapH smearing newly introduced in the HAL QCD method). Although potentials in different schemes have different forms as expected, we find that, for reasonably small smearing size, the resultant scattering phase shifts agree with each other if the next-to-leading-order (NLO) term is taken into account. We also find that the HAL QCD potential in the point-sink scheme has a negligible NLO term for a wide range of energies, which implies good convergence of the derivative expansion, while the potential in the smeared-sink scheme has a non-negligible NLO contribution. The implications of this observation for future studies of resonance channels (such as the Ι=0 and 1ππ scatterings) with smeared all-to-all propagators are briefly discussed.

収録刊行物

被引用文献 (6)*注記

もっと見る

参考文献 (60)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ