Anomalous decay of pion and eta at finite density

Details Anomalous decay of pion and eta at finite density Anomalous decay of pion and eta at finite density

2003-07-11

arxiv.org/abs/hep-ph/0307164v2

Phys.Lett. B577 (2003) 129-136; Erratum-ibid. B581 (2004) 274-275

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 4 figures included; revised version, to be published in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2003.10.020

We study the anomalous decays $\pi^0, \eta \to\gamma\gamma$ in the framework of the three--flavor Nambu--Jona-Lasinio [NJL] model, in the vacuum and in quark matter in $\beta$ --equilibrium. It is found that the behavior of the relevant observables essentially reflects a manifestation of the partial restoration of chiral symmetry, in non strange and strange sectors. The probability of such decays decreases with density, showing that anomalous mesonic interactions are significantly affected by the medium.

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