A theoretical approach to the (pion^{-}, gamma gamma) reaction in nuclei

Details A theoretical approach to the (pion^{-}, gamma gamma) reaction in nuclei A theoretical approach to the (pion^{-}, gamma gamma) reaction in nuclei

1994-10-19

arxiv.org/abs/nucl-th/9410032v1

Phys. Lett. B346 (1995) 1-4

Physics

Nuclear Physics

Nuclear Theory

8 pages, 3 figures available via Fax upon request, FTUV/94-52 IFIC/94-47

Scientific paper

10.1016/0370-2693(95)00009-A

We have studied the pion^{-} capture in nuclei leading to two photons, using improved many body methods which have been tested with success in one photon pion^{-} radiative capture, muon^{-} capture and neutrino scattering. The qualitative features of the experimental data are reproduced but there are still some disagreement at small relative photon angles. The reaction is a potential source of information on details of the gamma-gamma-pion-pion vertex where chiral corrections can be relevant. New and more precise experiments are planned which make calculations like the present one relevant and opportune. ---------------------------------------------------------

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