4.7 Article

Spectral sum of current correlators from lattice QCD

期刊

PHYSICAL REVIEW D
卷 104, 期 7, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.104.074521

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资金

  1. JSPS KAKENHI [18H03710]
  2. Post-K project through the Joint Institute for Computational Fundamental Science (JICFuS)
  3. Fugaku supercomputer project through the Joint Institute for Computational Fundamental Science (JICFuS)
  4. Grants-in-Aid for Scientific Research [18H03710] Funding Source: KAKEN

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The proposed method utilizes lattice QCD to compute the Borel transform of the vacuum polarization function in the Shifman-Vainshtein-Zakharov QCD sum rule. By constructing the spectral sum corresponding to the Borel transform from two-point functions on the Euclidean lattice, the method is confirmed to be consistent with the operator product expansion in the large Borel mass region. This method provides a basis for direct comparison of OPE analyses with nonperturbative lattice computations.
We propose a method to use lattice QCD to compute the Borel transform of the vacuum polarization function appearing in the Shifman-Vainshtein-Zakharov QCD sum rule. We construct the spectral sum corresponding to the Borel transform from two-point functions computed on the Euclidean lattice. As a proof of principle, we compute the s (s) over bar correlators at three lattice spacings and take the continuum limit. We confirm that the method yields results that are consistent with the operator product expansion in the large Borel mass region. The method provides a ground on which the OPE analyses can be directly compared with nonperturbative lattice computations.

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