59 citations · 64 across the 3 of their papers we have counts for
5 papers
Vector-like Singlet Quarks: a Roadmap
João M. Alves, G. C. Branco, A. L. Cherchiglia +5
We review the theory and phenomenology of isosinglet vector-like quarks (VLQs). In recent years, interest in VLQs has been increasing, due to their contributions to new physics eff…
Non-Unitary Mixing Matrices in Neutrino and Vector-like Quark Models
Pedro M. F. Pereira
This work analyses a class of extensions of the Standard Model through the lens of a novel exact parameterisation. This parameterisation is specially suitable to the analysis of ex…
Addressing the CKM Unitarity Problem with a Vector-like Up Quark
G. C. Branco, J. T. Penedo, Pedro M. F. Pereira +2
We point out that hints of deviations from unitarity in the first row of the CKM matrix may be explained by the presence of a single vector-like top. We study how the stringent exp…
Type-I Seesaw with eV-Scale Neutrinos
G. C. Branco, J. T. Penedo, Pedro M. F. Pereira +2
We consider seesaw type-I models including at least one (mostly-)sterile neutrino with mass at the eV scale. Three distinct situations are found, where the presence of light extra…
Can One have Significant Deviations from Leptonic Unitarity in the Framework of Type I Seesaw Mechanism?
Nuno Rosa Agostinho, G. C. Branco, Pedro M. F. Pereira +2
We address the question of deviations from unitarity of the leptonic mixing matrix showing that, contrary to conventional wisdom, one may have significant deviations fr…