Analysis of the quadrupole deformation of $Δ$(1232) within an effective Lagrangian model for pion photoproduction from the nucleon
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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.
3 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
3 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