Energy Dependence of the Delta Resonance: Chiral Dynamics in Action

Abstract

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

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

References in corpus (9)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Electromagnetic excitation of the Delta(1232)-resonance
• Investigation of the conjectured nucleon deformation at low momentum transfer
• Chiral Effective-Field Theory in the Delta(1232) Region: Pion Electroproduction on the Nucleon
• Signatures of chiral dynamics in the Nucleon to Delta transition
• Ovrview: The Shape of Hadrons
• Multipole Extraction: A novel, model independent method
• Accuracy of Extracted Multipoles from gamma* N -> Delta Data

Cited by in corpus (8)

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• Upper Energy Limit of Heavy Baryon Chiral Perturbation Theory in Neutral Pion Photoproduction
• Unexpected impact of D waves in low-energy neutral pion photoproduction from the proton and the extraction of multipoles
• Testing Lorentz Invariance with Neutrinos from Ultrahigh Energy Cosmic Ray Interactions
• Low-Energy D-Wave Effects in Neutral Pion Photoproduction
• Neutral Pion Production in the Threshold Region
• New Analysis of Threshold Photoproduction Data from MAMI
• Chiral Dynamics and Dubna-Mainz-Taipei Dynamical Model for Pion-Photoproduction Reaction