Improved Lattice Spectroscopy of Minimal Walking Technicolor

TL;DR

This study uses improved numerical techniques to analyze the spectrum of an SU(2) gauge theory with two adjoint fermions, confirming its IR-conformal behavior and highlighting the importance of controlling finite size effects.

Contribution

The paper introduces improved source and sink operators for spectroscopic measurements, providing more accurate results and systematic analysis compared to previous point-source methods.

Findings

Confirmed IR-conformal behavior of the theory

Demonstrated impact of finite size effects on results

Highlighted need for better control of finite size effects

Abstract

We present a numerical study of spectroscopic observables in the SU(2) gauge theory with two adjoint fermions using improved source and sink operators. We compare in detail our improved results with previous determinations of masses that used point sources and sinks and we investigate possible systematic effects in both cases. Such comparison enables us to clearly assess the impact of a short temporal extent on the physical picture, and to investigate some effects due to the finite spatial box. While confirming the IR-conformal behaviour of the theory, our investigation shows that in order to make firm quantitative predictions, a better handle on finite size effects is needed.