WChPT analysis of twisted mass lattice data
Sinya Aoki, Oliver Bar
TL;DR
This paper applies Wilson Chiral Perturbation Theory to analyze quenched twisted mass lattice data, demonstrating that WChPT effectively describes the data and captures the bending phenomenon observed at small quark masses.
Contribution
It provides the first detailed WChPT analysis of quenched twisted mass lattice data, including the impact of different critical mass choices.
Findings
WChPT describes the lattice data well
Fits yield reasonable low-energy parameters
The bending phenomenon is explained by WChPT
Abstract
We perform a Wilson Chiral Perturbation Theory (WChPT) analysis of quenched twisted mass lattice data. The data were generated by two independent groups with three different choices for the critical mass. For one choice, the so-called pion mass definition, one observes a strong curvature for small quark masses in various mesonic observables (''bending phenomenon''). Performing a combined fit to the next-to-leading (NLO) expressions, we find that WChPT describes the data very well and the fits provide very reasonable values for the low-energy parameters.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · High-Energy Particle Collisions Research