We analyze (using a chiral effective Lagrangian model) the scalar and pseudoscalar meson mass spectrum of QCD at finite temperature, above the chiral transition at Tc, looking, in particular, for signatures of a possible breaking of the U(1) axial symmetry above Tc. A detailed comparison between the case with a number of light quark flavors Nf≥3 and the (remarkably different) case Nf=2 is performed.
Comments on the U(1) axial symmetry and the chiral transition in QCD
MEGGIOLARO, ENRICO
2016-01-01
Abstract
We analyze (using a chiral effective Lagrangian model) the scalar and pseudoscalar meson mass spectrum of QCD at finite temperature, above the chiral transition at Tc, looking, in particular, for signatures of a possible breaking of the U(1) axial symmetry above Tc. A detailed comparison between the case with a number of light quark flavors Nf≥3 and the (remarkably different) case Nf=2 is performed.File in questo prodotto:
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