Chiral extrapolation and physical insights
R. D. Young, D. B. Leinweber, A. W. Thomas
TL;DR
This paper reviews how finite-range regularisation in chiral effective field theory improves the extrapolation of lattice QCD results, highlighting peculiar chiral features of the $$ resonance and their implications.
Contribution
It demonstrates the effectiveness of finite-range regularisation in chiral extrapolation and explores unique quenched lattice QCD features, especially of the $$ resonance.
Findings
Finite-range regularisation enables accurate chiral extrapolation.
Quenched lattice QCD shows peculiar chiral features in the $$ resonance.
Significant chiral corrections are identified in the $$ resonance.
Abstract
It has recently been established that finite-range regularisation in chiral effective field theory enables the accurate extrapolation of modern lattice QCD results to the chiral regime. We review some of the highlights of extrapolations of quenched lattice QCD results, including spectroscopy and magnetic moments. The resonance displays peculiar chiral features in the quenched theory which can be exploited to demonstrate the presence of significant chiral corrections.
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