June 29, 2015 to July 3, 2015
Pisa
Europe/Rome timezone

Chiral dynamics in the gamma p --> p pi0 reaction

Jun 29, 2015, 5:30 PM
20m
Room PS4 (Building E, Polo Fibonacci, Pisa)

Room PS4

Building E, Polo Fibonacci, Pisa

Talk Hadron Structure and Meson-Baryon Interaction Working Group Parallel Session 2 - Hadron Structure & Meson-Baryon Interaction WG

Speaker

Astrid Hiller Blin (IFIC, University of Valencia)

Description

We investigate the neutral pion photoproduction on the proton near threshold in covariant chiral perturbation theory with the explicit inclusion of Delta degrees of freedom. This channel is specially sensitive to chiral dynamics and the advent of very precise data from the Mainz microtron has shown the limits of the convergence of the chiral series for both the heavy baryon and the covariant approaches. We show that the inclusion of the Delta resonance substantially improves the convergence leading to a good agreement with data for a wider range of energies. e-Print: arXiv:1412.4083 [hep-ph]

Primary author

Astrid Hiller Blin (IFIC, University of Valencia)

Co-authors

Prof. Manuel Vicente Vacas (University of Valencia) Dr Tim Ledwig (University of Valencia)

Presentation materials