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hep-ph2026
Chiral anomaly: from vacuum to Columbia plot
Francesco Giacosa, Győző Kovács, Péter Kovács +2
We use a low-energy effective approach, the extended linear sigma model, to study realizations of the anomaly with different operators, linear and quadratic in the 't Hoof…
hep-ph2025
Naive Gaussian approximation in a quark-meson model
Győző Kovács, Zsolt Szép, Péter Kovács +1
A sequence of approximations is derived to go beyond the mean-field level in the case of a simple linear sigma model. A naive, local version of the Gaussian approximation is discus…