The role of chiral loops in η -> π0π0γγ
Abstract
We consider the rare decay η -> π0π0γγ and calculate the non-resonant contribution to the amplitude to one loop in Chiral Perturbation Theory. We display our result as both a diphoton energy spectrum and a partial decay rate as a function of the photon energy cut. It turns out that the one-loop correction can be numerically very important and could be detected, at sufficiently large center-of-mass photon energies, from a measurement of the partial decay width.
- Publication:
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Physics Letters B
- Pub Date:
- February 1997
- DOI:
- 10.1016/S0370-2693(97)00669-2
- arXiv:
- arXiv:hep-ph/9610328
- Bibcode:
- 1997PhLB..405..334B
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 10 pages, Latex. Discussion on the resonant background enlarged, sign error corrected, basic results unchanged. To appear in Phys. Lett. B