Analysis of the quadrupole deformation of $\Delta$(1232) within an effective Lagrangian model for pion photoproduction from the nucleon

Abstract

We present an extraction of the E2/M1 ratio of the $\Delta$(1232) from experimental data applying an effective Lagrangian model. We compare the result obtained with different nucleonic models and we reconcile the experimental results with the Lattice QCD calculations.

arXiv comment3 pages, 1 figure, 2 tables. Talk presented at the IV International Conference on Quarks and Nuclear Physics (QNP06), 5th June 2006 - 10th June 2006, Madrid. To be published in The European Physical Journal A

References in corpus (15)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Analysis of Pion Photoproduction Data
• Dynamical Study of the Delta Excitation in N(e,e' pi) Reactions
• Study of Non-Strange Baryon Resonances with Meson Photoproduction
• Baryon Resonance Extraction from piN Data using a Unitary Multichannel Model
• Electromagnetic Properties of the Delta(1232)
• Baryon Octet to Decuplet Electromagnetic Transitions
• The N to Delta electromagnetic transition form factors from Lattice QCD
• Lowest Q^2 Measurement of the gamma*p -> Delta Reaction: Probing the Pionic Contribution
• Effective Lagrangian Approach to pion photoproduction from the nucleon
• A Genetic Algorithm Analysis of N* Resonances in $p(\gamma ,K^{+})\Lambda$ Reactions
• Deviation of the Nucleon Shape From Spherical Symmetry: Experimental Status
• Pion photoproduction on nucleons in a covariant hadron-exchange model
• Hints on the quadrupole deformation of the $\Delta$(1232)

Cited by in corpus (6)

• A Covariant model for the nucleon and the $\Delta$
• Properties of Nucleon Resonances by means of a Genetic Algorithm
• Photoproduction of pi0-mesons off neutrons in the nucleon resonance region
• Crossing symmetry and phenomenological widths in effective Lagrangian models of the pion photoproduction process
• Eta Photoproduction as a Test of the Extended Chiral Symmetry
• Spin asymmetry for the 16O(gamma,pi- p) reaction in the Delta(1232) region within an effective Lagrangian approach