9 citations · 16 across the 7 of their papers we have counts for
7 papers
Feasible Deviations from Unitarity with Vector-Like Quark Singlets
Francisco Albergaria, Francisco J. Botella, G. C. Branco +2
We deduce pertinent relations between the elements of the CKM matrix, and find that not all of these are totally compatible with experiment and/or the assumption of the SM $3 \time…
Vector-like quark doublets, weak-basis invariants and CP violation
F. Albergaria, J. F. Bastos, B. Belfatto +4
We study Standard Model extensions with isodoublet vector-like quarks with standard charges. Their presence induces right-handed charged and neutral currents. We identify minimal s…
Reducing Complex Phases and other Subtleties of CP Violation
José Filipe Bastos, J. I. Silva-Marcos
When extending the SM, e.g. with vector-like quarks (VLQ), one inevitably encounters more than one CP violating complex phases. In this work, we develop a method useful in reducing…
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…
CP-odd and CP-even Weak-Basis Invariants in the Presence of Vector-Like Quarks
Francisco Albergaria, G. C. Branco, José Filipe Bastos +1
We propose a minimal set of weak-basis invariants in an extension of the SM where one up-type isosinglet vector-like quark is introduced, which allows us to obtain all the physical…
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…