5 papers
A note on analytic continuation to Minkowski space relevant for decay-model phenomenology
Alexandre Salas-Bernárdez, Juan Ferrera, Felipe J. Llanes-Estrada
We discuss some aspects of the uniqueness of analytically continuing Euclidean Green functions obtained by means of the Dyson-Schwinger equations (DSEs) and constrained by lattice…
The left-cut for partial waves in terms of physical amplitudes
Alexandre Salas-Bernárdez
We derive a novel representation of the partial wave amplitude over the left-hand cut for scattering. We express the left-hand cut of arbitrary isospin and angular moment…
Analytical Quantum Field methods in Particle Physics
Alexandre Salas-Bernárdez
In this thesis we deal with different aspects of quantum field theory, particularly in non-perturbative but also perturbative regimes, applied to the intellectual construction that…
Assessment of systematic theory uncertainties in IAM unitarization
Juan Escudero-Pedrosa, Felipe J. Llanes-Estrada, José Antonio Oller +1
Effective Field Theories (EFTs) for Goldstone Boson scattering at a low order allow the computation of near--threshold observables in terms of a few coefficients arranged by a coun…
Systematizing and addressing theory uncertainties of unitarization with the Inverse Amplitude Method
Alexandre Salas-Bernárdez, Felipe J. Llanes-Estrada, Juan Escudero-Pedrosa +1
Effective Field Theories (EFTs) constructed as derivative expansions in powers of momentum, in the spirit of Chiral Perturbation Theory (ChPT), are a controllable approximation to…