Lattice calculation of pion form factors with overlap fermions

Gen Wang, Jian Liang, Terrence Draper, Keh Fei Liu, Yi Bo Yang

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18 Scopus citations

Abstract

We present a precise calculation of the pion form factor using overlap fermions on seven ensembles of ()-flavor domain-wall configurations with pion masses varying from 139 to . Taking advantage of the fast Fourier transform and other techniques to access many combinations of source and sink momenta, we find the pion mean square charge radius to be , which agrees well with the experimental result, and includes the systematic uncertainties from chiral extrapolation, lattice spacing and finite-volume dependence. We also find that depends on both the valence and sea quark masses strongly and predicts the pion form factor up to , which agrees with experiments very well.

Original languageEnglish
Article number074502
JournalPhysical Review D
Volume104
Issue number7
DOIs
StatePublished - Oct 1 2021

Bibliographical note

Publisher Copyright:
© 2021 Published by the American Physical Society

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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