21 citations · 64 across the 14 of their papers we have counts for
14 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…
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…
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…
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 s…
Unraveling particle dark matter with Physics-Informed Neural Networks
M. P. Bento, H. B. Câmara, J. F. Seabra
We parametrically solve the Boltzmann equations governing freeze-in dark matter (DM) in alternative cosmologies with Physics-Informed Neural Networks (PINNs), a mesh-free method. T…
Axion framework with color-mediated Dirac neutrino masses
A. Batra, H. B. Câmara, F. R. Joaquim +3
We propose a KSVZ-type axion framework in which vector-like quarks (VLQ) and colored scalars generate Dirac neutrino masses radiatively. The global Peccei-Quinn symmetry (under whi…
Axion Paradigm with Color-Mediated Neutrino Masses
A. Batra, H. B. Câmara, F. R. Joaquim +2
We propose a generalized Kim-Shifman-Vainshtein-Zakharov-type axion framework in which colored fermions and scalars act as two-loop Majorana neutrino-mass mediators. The global Pec…
Confronting the 95 GeV excesses within the UN2HDM
J. A. Aguilar-Saavedra, H. B. Câmara, F. R. Joaquim +1
We consider the small excesses around 95 GeV found in several searches for a new scalar in , and final states. Instead of trying to accommodate them all, as is…
Dark linear seesaw mechanism
A. Batra, H. B. Câmara, F. R. Joaquim
We propose a minimal model where a dark sector, odd under a discrete symmetry, is the seed of lepton number violation in the neutrino sector at the loop level, in t…
Hybrid scoto/seesaw: flavour and dark matter
D. M. Barreiros, H. B. Câmara, F. R. Joaquim
We propose a model based on the interplay between the type-II seesaw and scotogenic neutrino mass generation mechanisms. The setup features a discrete flavour symmet…
Dark-sector seeded solution to the strong CP problem
H. B. Câmara, F. R. Joaquim, J. W. F. Valle
We propose a novel realization of the Nelson-Barr mechanism "seeded'' by a dark sector containing scalars and vector-like quarks. Charge-parity (CP) and a symmetry…
Scalar-singlet assisted leptogenesis with CP violation from the vacuum
D. M. Barreiros, H. B. Câmara, R. G. Felipe +1
In the vanilla type-I seesaw leptogenesis scenario, CP violation required to generate the lepton asymmetries in the heavy Majorana neutrino decays stem from complex Dirac-type Yuka…
Flavour and dark matter in a scoto/type-II seesaw model
D. M. Barreiros, H. B. Camara, F. R. Joaquim
The neutrino mass and dark matter (DM) problems are addressed in a Standard Model extension where the type-II seesaw and scotogenic mechanisms coexist. The model features a flavour…