Exploring walking behavior in SU(3) gauge theory with 4 and 8 HISQ quarks

TL;DR

This paper investigates the walking behavior of SU(3) gauge theory with 4 and 8 HISQ quarks using lattice QCD simulations, aiming to understand their potential for phenomenological models like walking technicolor.

Contribution

It provides the first lattice QCD analysis comparing 4 and 8 flavor cases, focusing on the spectrum and chiral properties relevant to walking behavior and phenomenology.

Findings

Preliminary spectrum results for Nf=8 and 4 flavors.

Evidence of different chiral symmetry breaking patterns.

Discussion on Nf=8 QCD's relevance to phenomenology.

Abstract

We present the report of the LatKMI collaboration on the lattice QCD simulation for the cases of 4 and 8 flavors. The Nf=8 in particular is interesting from the model-building point of view: The typical walking technicolor model with the large anomalous dimension is the so-called one-family model (Farhi-Susskind model). Thus we explore the walking behavior in LQCD with 8 HISQ quarks by comparing with the 4-flavor case (in which the chiral symmetry is spontaneously broken). We report preliminary results on the spectrum, analyzed through the chiral perturbation theory and the finite-size hyperscaling, and we discuss the availability of the Nf=8 QCD to the phenomenology.