Elsevier

Physics Letters B

Volume 119, Issues 4–6, 23 December 1982, Pages 285-288
Physics Letters B

Isospin dependence of pion absorption by nucleon pairs in the He isotopes

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Abstract

We calculate the relative absorption ratio of a pion by T = 0 and T = 1 nucleon pairs in the He isotopes measured recently by Ashery et al. Standard theory based on Δ-isobar intermediate excitations agrees with the experimental observation that for energies around the resonance, pion absorption by a T = 1 nucleon pair is strongly suppressed.

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This work was supported by the National Science Foundation under grant no. PHY-80-17605.

1

We are extremely grateful to G.F. Bertsch for introducing us to these interesting experimental data and for enlightening discussions in the course of the work. Thanks are also due to G.E. Brown and W. Weise for stimulating discussions and to D. Ashery, E. Piasetzhy and J.P. Schiffer for experimental information.

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