6533b828fe1ef96bd1288bd9
RESEARCH PRODUCT
Chiral dynamics in the (gamma)over-right-arrowp -> p pi(0) reaction
Astrid Nathalie Hiller BlinT. LedwigManuel José Vicente Vacassubject
High Energy Physics::LatticeHigh Energy Physics::PhenomenologyNuclear TheoryFísicaNuclear Experimentdescription
We investigate the neutral pion photoproduction on the proton near threshold in covariant chiral perturbation theory with the explicit inclusion of A 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-01-01 |