Chiral symmetry and threshold π0 electroproduction

Phys. Rev. Lett. 70, 387 – Published 25 January 1993
Véronique Bernard, Norbert Kaiser, T.-S. H. Lee, and Ulf-G. Meissner


The electroproduction of neutral pions off protons close to threshold is studied within the framework of chiral perturbation theory. We compare to the recent data from NIKHEF and find good agreement. Further measurements as tests of chiral symmetry are discussed.


  • Received 14 October 1992
  • Published in the issue dated 25 January 1993

© 1993 The American Physical Society

Authors & Affiliations

Véronique Bernard

  • Centre de Recherches Nucléaires et Université Louis Pasteur de Strasbourg, Physique Théorique, BP 20Cr, 67037 Strasbourg CEDEX 2, France

Norbert Kaiser

  • Physik Department T30, Technische Universität München, James Franck Strasse, D-8046 Garching, Germany

T.-S. H. Lee

  • Physics Division, Argonne National Laboratory, Argonne, Illinois 60439

Ulf-G. Meissner

  • Universität Bern, Institut für Theoretische Physik, Sidlerstrasse 5, CH-3012 Bern, Switzerland

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