Unquenching effects in the quark and gluon propagator
Waseem Kamleh, Patrick O. Bowman, Derek B. Leinweber, Anthony G., Williams, and Jianbo Zhang
TL;DR
This paper investigates how sea quarks influence the infrared behavior of quark and gluon propagators using lattice QCD simulations with improved actions, revealing suppression effects in the infrared region.
Contribution
It provides the first detailed comparison of quark and gluon propagators in dynamical versus quenched lattice QCD with FLIC overlap fermions and Luscher-Weisz gauge action.
Findings
Sea quarks suppress the mass function in the infrared
Sea quarks reduce the gluon dressing function in the infrared
Ultraviolet physics remains unchanged by sea quarks
Abstract
In this work we examine the Fat-Link Irrelevant Clover (FLIC) overlap quark propagator and the gluon propagator on both dynamical and quenched lattices. The tadpole-improved Luscher-Weisz gauge action is used in both cases. The dynamical gauge fields use the FLIC fermion action for the sea quark contribution. We observe that the presence of sea quarks causes a suppression of the mass function, quark renormalization function and gluon dressing function in the infrared. The ultraviolet physics is unaffected.
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