Elsevier

Nuclear Physics A

Volume 469, Issue 4, 10 August 1987, Pages 717-725
Nuclear Physics A

Pion-nucleon scattering: Chiral symmetry and unitarity

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Abstract

The chiral quark models which have been constructed over the past five years generally preserve chiral symmetry in the tree approximation. However, unitarity is then violated. We examine the problem of going beyond the tree approximation for s-wave pion-nucleon scattering within the context of the cloudy bag model.

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Present address: Department of Physics, McGill University, 3600 University Street, Montréal, PQ, Canada H3A 2TB.

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