I=0 scalar channel

TL;DR

This study uses lattice QCD with dynamical Wilson fermions to investigate the I=0, J^P=0^+ channel for the sigma meson, highlighting the comparable contributions of connected and disconnected diagrams.

Contribution

It provides a preliminary lattice QCD analysis of the sigma meson, emphasizing the importance of both connected and disconnected diagrams in its propagator.

Findings

Connected and disconnected diagrams contribute equally to the sigma propagator.

Preliminary results support the significance of disconnected diagrams in sigma meson studies.

The study advances understanding of scalar meson structure in lattice QCD.

Abstract

Using lattice QCD with dynamical Wilson fermions, we study I=0 and $J^{P}=0^{+}$ channel which is constructed by $\frac{1}{\sqrt{2}}(\bar{u}u+\bar{d}d)|0>$, in order to search for the $\sigma$ meson. Our preliminary result shows that the connected and disconnected diagrams contribute to the $\sigma$ meson propagator in the same order.