Eta decays at and beyond $\mathbf{p^4}$ in Chiral Perturbation Theory

Details Eta decays at and beyond $\mathbf{p^4}$ in Chiral Perturbation Theory Eta decays at and beyond $\mathbf{p^4}$ in Chiral Perturbation Theory

2002-02-26

arxiv.org/abs/hep-ph/0202242v2

Phys.Scripta T99 (2002) 34-44

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talks presented at the Workshop on Eta Physics, Angstrom laboratory, Uppsala, October 25-27, 2001; published version (Physica

Scientific paper

10.1238/Physica.Topical.099a0003

An overview is given of Chiral Perturbation Theory and various applications to eta decays. In particular, the main decay $\eta\to3\pi$ is discussed at the one-loop level, and estimates of the higher order corrections are given. The importance of $p^6$ and higher order effects in double Dalitz and $\eta\to\pi^0\gamma\gamma$ decays is pointed out. In all these cases the need for new experimental results is stressed.

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