2019 USQCD All-Hands Collaboration Meeting

Higgs-Yukawa model with reduced staggered fermions

26 Apr 2019, 15:45

5m

Large Seminar Room Lobby (BNL Physics Department)

Poster Session w/ Coffee

Speaker

Nouman Butt (Syracuse University)

Description

We explore the phase structure of a four dimensional $SO(4)$ invariant lattice Higgs-Yukawa model comprising four reduced staggered fermions interacting with a real scalar field.The fermions belong to the fundamental
representation of the symmetry group while the three scalar field components transform in the self-dual representation of $SO(4)$. The model is a generalization of a four fermion system with the same
symmetries that has received recent attention because of its unusual phase structure comprising massless and massive symmetric phases separated by a very narrow phase in which a small
bilinear condensate breaking $SO(4)$ symmetry is present. The generalization described in this paper simply consists of the addition of a scalar kinetic term. We find a region of the enlarged phase diagram
which shows no sign of a fermion condensate or symmetry breaking but in which there is nevertheless evidence of a diverging correlation length. Our results in this region are consistent with the presence of
a single continuous phase transition separating the massless and massive symmetric phases observed in the earlier work.