Anomalous mesonic interactions near a chiral phase transition

Details Anomalous mesonic interactions near a chiral phase transition Anomalous mesonic interactions near a chiral phase transition

1996-01-23

arxiv.org/abs/hep-ph/9601316v1

Phys.Rev.Lett. 76 (1996) 3084-3087

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, REVTeX, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.76.3084

Using constituent quarks coupled to a linear sigma model at nonzero
temperature, I show that many anomalous mesonic amplitudes, such as $\pi^0
\rightarrow \gamma \gamma$, vanish in a chirally symmetric phase. Processes
which are allowed, such as $\pi^0 \sigma \rightarrow \gamma \gamma$, are
computed to leading order in a loop expansion.

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