2015/10/06 by Astrid Hiller Blin, Blin, Astrid Hiller, Tim Ledwig +3
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.1510.01598
Proceedings to the 8th International Workshop on Chiral Dynamic 2015
arxiv created 2015/10/06 · arxiv updated 2015/10/07
We study the neutral pion photoproduction at near-threshold energies in fully covariant chiral perturbation theory up to O(p3). When including only nucleonic virtual states in the model, the convergence is too slow. Therefore we test the model when introducing the Delta(1232) resonance as an additional degree of freedom. Some low-energy constants were fitted, converging to values in good agreement with those expected from literature.