PT Journal
AU Hiller Blin, AN
   Ledwig, T
   Vicente Vacas, MJ
TI Delta(1232) resonance in the (gamma)over-right-arrowp -> p pi(0) reaction at threshold
SO Physical Review D
JI Phys. Rev. D
PY 2016
BP 094018
EP 19pp
VL 93
IS 9
DI 10.1103/PhysRevD.93.094018
LA English
AB We calculate the neutral pion photoproduction on the proton near threshold in covariant baryon chiral perturbation theory, including the Delta(1232) resonance as an explicit degree of freedom, up to chiral order p(7/2) in the delta counting. We compare our results with recent low-energy data from the Mainz Microtron for angular distributions and photon asymmetries. The convergence of the chiral series of the covariant approach is found to improve substantially with the inclusion of the Delta(1232) resonance.
ER