4 papers · 1 filter
Coupled-channel formalism
José Antonio Oller
This article provides a pedagogical exploration of coupled-channel scattering in hadronic physics, focusing on theoretical methodologies, and practical applications. It covers key…
Isospin-breaking contribution to the model-independent axion-photon-photon coupling in chiral theory
Rui Gao, Jin Hao, Chun-Gui Duan +3
We pursue the calculation of the model-independent component of the axion-photon-photon coupling in the chiral perturbation theory up to next-to-leading order, with the emph…
Lectures on scattering theory in partial-wave amplitudes
J. A. Oller
These lectures treat scattering theory from a non-perturbative point of view. The course begins with a review of formal aspects in scattering theory, discussing the in/out states a…
Unitarization of electron scattering with an external potential at NLO in QED
J. A. Oller, Marcela Peláez
We have calculated the one-loop scattering amplitude of an electron by an external Coulomb potential in QED free of infrared divergences. This feature is achieved by applying the F…