Cooling in QCD Spectroscopy
Robert G. Edwards, Khalil Bitar, Urs M. Heller, and A.D. Kennedy
TL;DR
This paper evaluates the cooling algorithm in QCD spectroscopy, revealing its unreliability for hadronic operators and its impact on the spin structure of the spectrum, through gluonic and hadronic tests on dynamical configurations.
Contribution
It provides a critical assessment of cooling in QCD spectroscopy, highlighting limitations and effects on the hadron spectrum and topological properties.
Findings
Cooling is unreliable for improved hadronic operators.
Cooling sweeps distort the spin structure of the spectrum.
Cooling affects the topological properties of gauge fields.
Abstract
We test the cooling algorithm with gluonic and staggered hadronic spectroscopy on gauge field configurations generated with two flavors of staggered dynamical fermions. We find cooling is not reliable as the basis for improved hadronic operators. We also find that performing cooling sweeps to reveal more clearly the topological properties of the gauge fields eliminates the spin structure of the hadron spectrum.
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