3 papers
hep-ph2026
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 $3 \times 3…
hep-ph2024
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…
hep-ph2023
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…