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Title

Pion photoproduction off nucleons in covariant chiral perturbation theory

AuthorsGuerrero Navarro, G.H.; Vicente Vacas, Manuel J; Blin, A.N.H.; Yao, D.L.
Issue DateNov-2019
PublisherAmerican Physical Society
CitationPhysical Review D 100 (2019)
AbstractPion photoproduction off the nucleon close to threshold is studied in covariant baryon chiral perturbation theory at O(p3) in the extended-on-mass-shell scheme, with the explicit inclusion of the Δ(1232) resonance using the δ 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 are well known from the analysis of other processes and the comparison with data constrains some of the still unknown ones. The Δ(1232) contribution is significant in improving the agreement with data, even at the low energies considered.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevD.100.094021
URIhttp://hdl.handle.net/10261/208012
Identifiersdoi: 10.1103/PhysRevD.100.094021
issn: 2470-0029
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