2009/05/24 by Vadim Lensky, V. Lensky, V. Pascalutsa +3
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.48550/arxiv.0905.3861
7 pages, 4 figures, to appear in in the proceedings of the International Workshop on Effective Field Theories: from the Pion to the Upsilon. EFT09, Valencia, 1-6 Feb. 2009
arxiv created 2009/05/24 · openalex publication_date 2009/05/24 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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. We find that the substantial effect of the Δ-excitation on the nucleon polarizabilities can naturally be accommodated in the manifestly covariant calculation.