Analysis of the low-energy theorem forγp →pπ
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| Authors: | H W L Naus R M Davidson |
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| Institution: | 1. Institute for Theoretical Physics, University of Heidelberg, Philosophenweg 19, D-69120, Heidelberg, Germany
3. National Institute for Nuclear Physics and High Energy Physics, P.O. Box 41882, 1009 DB, Amsterdam, The Netherlands
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| Abstract: | The derivation of the ‘classical’ low-energy theorem (LET) forγp→pπ 0 is re-examined and compared to chiral perturbation theory. Both results are correct and are not contradictory; they differ because different expansions of the same quantity are involved. Possible modifications of the extended partially conserved axial-vector current relation, one of the starting points in the derivation of the LET, are discussed. An alternate, more transparent form of the LET is presented. |
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