2.6k citations · 5.4k across the 78 of their papers we have counts for
77 papers
Unitarity Relations in the Presence of Vector-Like Quarks
Francisco Albergaria, Gustavo C. Branco
We study, in a systematic way, the unitarity relations which arise in extensions of the three generations Standard Model (3gSM) involving the addition of vector-li…
Does Quark Mixing play a role in the Lepton Sector?
Francisco Albergaria, G. C. Branco, José Filipe Bastos +1
We suggest a simple relation between the quark and the lepton mixing within the framework of type-I seesaw mechanism. We show that within our ansatz the empirical King-Mohapatra-Sm…
Vector-like Quarks
Gustavo Castelo Branco, M. N. Rebelo
In this talk we emphasise the importance of vector-like quarks (VLQs) and their potential to solve some of the open questions of the Standard Model. These are, in some sense minima…
Do the Small Numbers in the Quark Mixing arise from New Physics?
G. C. Branco, José Filipe Bastos, J. I. Silva-Marcos
We put forward the conjecture that the small numbers in the matrix, are generated by physics beyond the Standard Model. We identify as small numbers and the…
Decays of the Heavy Top and New Insights on in a one-VLQ Minimal Solution to the CKM Unitarity Problem
Francisco J. Botella, G. C. Branco, M. N. Rebelo +2
We propose a minimal extension of the Standard Model where an up-type vector-like quark, denoted , is introduced and provides a simple solution to the CKM unitarity problem. We…
The framework for a common origin of and
João M. Alves, Francisco J. Botella, Gustavo C. Branco +2
We analyse a possible connection between CP violations in the quark and lepton sectors, parametrised by the CKM and PMNS phases. If one assumes that CP breaking arises from complex…