Eur. Phys. J. A (2007) 31: 572-574
https://doi.org/10.1140/epja/i2006-10198-1

QNP 2006

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

¹ Instituto de Estructura de la Materia, CSIC, Serrano 123, E-28006, Madrid, Spain
² Departamento de Fısica Atómica, Molecular y Nuclear, Universidad de Sevilla, Apdo. 1065, E-41080, Sevilla, Spain
³ Departamento de Fısica Atómica, Molecular y Nuclear, Facultad de Ciencias Fısicas, Universidad Complutense de Madrid, Avda. Complutense s/n, E-28040, Madrid, Spain

Received: 8 October 2006
Accepted: 15 October 2006
Published online: 22 February 2007

Abstract

We present an extraction of the E2/M1 ratio of the Δ(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.