Lattice QCD study of four-quark components of the isosinglet scalar mesons: Significance of disconnected diagrams

Masayuki Wakayama, Teiji Kunihiro, Shin Muroya +4

We study the possible significance of four-quark states in the iso-singlet scalar mesons ($J^{PC}=0^{++}$, $I=0$) by performing two-flavor full lattice QCD simulations on an $8^3 \…