Energy Dependence of the Delta Resonance: Chiral Dynamics in Action

Details Energy Dependence of the Delta Resonance: Chiral Dynamics in Action Energy Dependence of the Delta Resonance: Chiral Dynamics in Action

2007-10-17

arxiv.org/abs/0710.3387v1

Few Body Syst.41:83-93,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 6 figures, Festschrift for S.N. yang

Scientific paper

10.1007/s00601-007-0190-6

There is an important connection between the low energy theorems of QCD and the energy dependence of the Delta resonance in pi-N scattering, as well as the closely related gamma^{*} N -> pi N reaction. The resonance shape is due not only to the strong pi-N interaction in the p wave but the small interaction in the s wave; the latter is due to spontaneous chiral symmetry breaking in QCD (i.e. the Nambu-Goldstone nature of the pion). A brief overview of experimental tests of chiral perturbation theory and chiral based models is presented

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