English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The anomalous pseudoscalar-photon vertex is studied in real time in and outof equilibrium in a constituent quark model. The goal is to understand thein-medium modifications of this vertex, exploring the possibility of enhancedisospin breaking by electromagnetic effects as well as the formation of neutralpion condensates in a rapid chiral phase transition in peripheral,ultrarelativistic heavy-ion collisions. In equilibrium the effective vertex isafflicted by infrared and collinear singularities that require hard thermalloop (HTL) and width corrections of the quark propagator. The resummedeffective equilibrium vertex vanishes near the chiral transition in the chirallimit. In a strongly out of equilibrium chiral phase transition we find thatthe chiral condensate drastically modifies the quark propagators and theeffective vertex. The ensuing dynamics for the neutral pion results in apotential enhancement of isospin breaking and the formation of $\pi^0$condensates. While the anomaly equation and the axial Ward identity are notmodified by the medium in or out of equilibrium, the effective real-timepseudoscalar-photon vertex is sensitive to low energy physics.

Anomalous pseudoscalar-photon vertex in and out of equilibrium