8 papers
One-loop proton decay from Peccei-Quinn symmetry
H. B. Câmara
We promote the accidental symmetry of the Standard Model to a Peccei-Quinn (PQ) symmetry while realizing spontaneous proton decay radiatively. The PQ anomaly sector consists…
Neutrino-Induced Polarization Rotation in Active Galactic Nuclei Plasmas
H. B. Câmara, A. Smetana, A. A. Tursunov
We study parity-violating birefringence induced by an asymmetric neutrino background in plasmas associated with active galactic nuclei (AGN). We derive a directionality factor aris…
Solving stiff dark matter equations via Jacobian Normalization with Physics-Informed Neural Networks
M. P. Bento, H. B. Câmara, J. R. Rocha +1
Stiff differential equations pose a major challenge for Physics-Informed Neural Networks (PINNs), often causing poor convergence. We propose a simple, hyperparameter-free method to…
From Dark Sectors to the Axion-Neutrino Connection
H. B. Câmara
The Standard Model (SM) of particle physics provides a successful description of fundamental particles and their interactions but fails to explain phenomena such as neutrino oscill…
Flavored Peccei-Quinn symmetries in the minimal DFSZ model
J. R. Rocha, H. B. Câmara, F. R. Joaquim
We consider a Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) axion model extended with two right-handed neutrino fields to realize the minimal type-I seesaw. In this DFSZ scheme we…
Minimal U(1) two-Higgs-doublet models for quark and lepton flavour
J. R. Rocha, H. B. Câmara, R. G. Felipe +1
In the context of the 2HDM, and assuming that neutrinos acquire masses via the Weinberg operator, we perform a systematic analysis to determine the minimal quark and lepton flavour…