Diquark effects in light baryon correlators from lattice QCD

TL;DR

This study investigates how diquarks influence light baryon properties using lattice QCD simulations, highlighting the importance of scalar diquarks and the effects of dynamical fermions on baryon correlators.

Contribution

It provides a comparative analysis of quenched and dynamical lattice QCD simulations, revealing the significance of scalar diquarks and their interactions in light baryons.

Findings

Scalar diquarks significantly affect baryon correlators.

Dynamical fermions alter zero mode effects in correlators.

Different diquark operators lead to distinct behaviors in correlators.

Abstract

We study the role of diquarks in light baryons through point to point baryon correlators. We contrast results from quenched simulations with ones with two flavors of dynamical overlap fermions. The scalar, pseudoscalar and axial vector diquarks are combined with light quarks to form color singlets. The quenched simulation shows large zero mode effects in correlators containing the scalar and pseudoscalar diquark. The two scalar diquarks created by gamma_5 and gamma_0gamma_5 lead to different behavior in baryon correlators, showing that the interaction of diquarks with the third light quark matters: we do not see an isolated diquark. In our quark mass range, the scalar diquark created by gamma_5 seems to play a greater role than the others.