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VOLUME 89 | ISSUE 3 | PAGE 127 Manifestly-covariant p3 calculation of nucleon Compton scattering V. Lensky+*, V. Pascalutsa PACS: 13.60.Fz, 14.20.Dh, 25.20.Dc Abstract We compute the Compton scattering off the nucleons in the framework of manifestly covariant baryon chiral perturbation theory (BχPT). The results for observables differ substantially from the corresponding calculations in heavy-baryon chiral perturbation theory (HBχPT), most appreciably in the forward kinematics. We verify that the covariant p3 result fulfills the forward-Compton-scattering sum rules. We also explore the effect of the Δ(1232) resonance at order p4/Δ, with MeV, the resonance excitation energy. We find that the substantial effect of the Δ-excitation on the nucleon polarizabilities can naturally be accommodated in the manifestly covariant calculation. Download PS file (GZipped, 403.4K)  |  Download PDF file (377.2K) Список работ, цитирующих данную статью, см. здесь. List of articles citing this article can be found here.