The effects of an extra U(1) axial condensate on the radiative decay eta' --> gamma gamma at finite temperature

Abstract

Supported by recent lattice results, we consider a scenario in which a U(1)-breaking condensate survives across the chiral transition in QCD. This scenario has important consequences on the pseudoscalar-meson sector, which can be studied using an effective Lagrangian model. In particular, generalizing the results obtained in a previous paper (where the zero-temperature case was considered), we study the effects of this U(1) chiral condensate on the radiative decay eta' --> gamma gamma at finite temperature.

15 pages, LaTeX file

References in corpus (3)

• Reviewing the problem of the U(1) axial symmetry and the chiral transition in QCD
• ${\eta }^{\prime }(\eta )\to \gamma \gamma$: A Tale of Two Anomalies
• Remarks on the U(1) axial symmetry in QCD at zero and non-zero temperature

Cited by in corpus (5)

• Theta dependence of SU(N) gauge theories in the presence of a topological term
• Remarks on the U(1) axial symmetry and the chiral transition in QCD at finite temperature
• Study of the interactions of the axion with mesons and photons using a chiral effective Lagrangian model
• Study of the theta dependence of the vacuum energy density in chiral effective Lagrangian models at zero temperature
• Theta dependence of the vacuum energy density in chiral effective Lagrangian models at finite temperature, above $T_c$