TY  - JOUR
AU  - Guerrero Navarro, G. H.
AU  - Vicente Vacas, M. J.
AU  - Hiller Blin, A. N.
AU  - Yao, D. L.
PY  - 2019
DA  - 2019//
TI  - Pion photoproduction off nucleons in covariant chiral perturbation theory
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 094021
EP  - 18pp
VL  - 100
IS  - 9
PB  - Amer Physical Soc
AB  - Pion photoproduction off the nucleon close to threshold is studied in covariant baryon chiral perturbation theory at O(p(3)) in the extended-on-mass-shell scheme, with the explicit inclusion of the Delta(1232) resonance using the delta counting. The theory is compared to the available data of cross sections and polarization observables for all the charge channels. Most of the necessary low-energy constants arc well known from the analysis of other processes and the comparison with data constrains some of the still unknown ones. The Delta(1232) contribution is significant in improving the agreement with data, even at the low energies considered.
SN  - 2470-0010
UR  - https://arxiv.org/abs/1908.00890
UR  - https://doi.org/10.1103/PhysRevD.100.094021
DO  - 10.1103/PhysRevD.100.094021
LA  - English
N1  - WOS:000498060600002
ID  - GuerreroNavarro_etal2019
ER  -