7 papers
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…
Bootstrapping Two-Nucleon Effective Field Theories
Q. N. Micha-Mba, M. S. Sánchez, P. G. Ortega +2
Chiral EFT yields singular potentials that require regularization and renormalization when implemented in a dynamical equation such as the Lippmann--Schwinger equation. We employ t…
Contact potentials in presence of a regular finite-range interaction using dimensional regularization and the method
David R. Entem, Juan Nieves, Jose Antonio Oller
We solve the Lippman-Schwinger equation (LSE) with a kernel that includes a regular finite-range potential and additional contact terms with derivatives. We employ distorted wave t…
Unitarization of the one-loop graviton-graviton scattering amplitudes and study of the graviball
J. A. Oller, Marcela Peláez
From the graviton-graviton scattering amplitudes calculated perturbatively in quantum gravity to the one-loop order, we develop further a formalism that allows one to calculate inf…
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…
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…