Particle Ratios from a Chiral SU(3) Model

Spatiotemporal distribution characteristics and mechanism analysis of urban population density: A case of Xi'an, Shaanxi, China

“…In this work, we make use of the gauge invariant Pauli-Villars regularization scheme [27,37,48,93,[97][98][99][100], where the quark momentum runs formally from zero to infinity. The three parameters in the Pauli-Villars regularized NJL model, namely the current quark mass m 0 = 5 MeV, the coupling constant G = 3.44 GeV −2 and the Pauli-Villars mass parameter Λ = 1127 MeV are fixed by fitting the chiral condensate ψψ = −(250 MeV) 3 , pion mass m π = 134 MeV and pion decay constant f π = 93 MeV in vacuum with T = µ = 0 and eB = 0. In our current calculations, we consider the situation with finite temperature and magnetic field and vanishing quark chemical potential µ = 0.…”

“…The study of hadron properties in QCD medium is important for our understanding of strong interaction matter, due to its close relation to QCD phase structure and relativistic heavy ion collision. For instance, the chiral symmetry breaking leads to the rich meson spectra, and the mass shift of hadrons will enhance or reduce their thermal production in relativistic heavy ion collisions [1][2][3].…”

Functional renormalization for chiral andUA(1)symmetries at finite temperature

“…On the other hand, the observation of the hadron spectra provides an experimental way to test the restoration of the two symmetries in hot medium created in relativistic heavy ion collisions. The mass shift due to the chiral restoration enhances or reduces the hadron thermal production, for instance for the kaon yields and ratios [7][8][9]. The partial restoration of the U A (1) symmetry is closely related to the production of η meson and spin-excited hadrons in hot medium [10,11].…”