Quenched scalar meson correlator with Domain Wall Fermions
S. Prelovsek, K. Orginos
TL;DR
This paper investigates scalar meson masses using domain wall fermions in quenched QCD, finding the singlet meson potentially lighter than 1 GeV and analyzing correlators with chiral perturbation theory.
Contribution
It provides the first detailed study of singlet and non-singlet scalar meson masses with domain wall fermions in the quenched approximation.
Findings
Singlet scalar meson mass is smaller than non-singlet.
The singlet meson could be lighter than 1 GeV.
Two-point functions align with small-volume chiral perturbation theory.
Abstract
We study the singlet and non-singlet scalar-meson masses using domain wall fermions and the quenched approximation. The singlet mass is found to be smaller than the non-singlet mass and indicates that the lowest singlet meson state could be lighter than 1 GeV. The two-point functions for very small quark masses are compared with expectations from the small-volume chiral perturbation theory and the presence of fermionic zero modes.
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