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 forwardCompton-scattering sum rules. We also explore the effect of the ∆(1232) resonance at order p4/∆ , with ∆ ≈ 300 MeV, the resonance excitation energy. We find that the substantial effect of the ∆-excitation on the nucleon polarizabilities can naturally be accommodated in the manifestly covariant calculation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
