CP-odd and CP-even weak-basis invariants in the presence of vector-like quarks

We propose a minimal set of weak-basis invariants in an extension of the standard model (SM) where one up-type isosinglet vector-like quark is introduced, which allows us to obtain all the physical content of the CKM matrix. We present CP-odd invariants of lower order in mass than the one in the SM,...

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Bibliographic Details
Published in:Journal of physics. G, Nuclear and particle physics Nuclear and particle physics, 2023-05, Vol.50 (5), p.55001
Main Authors: Albergaria, Francisco, Branco, G C, Bastos, José Filipe, Silva-Marcos, J I
Format: Article
Language:English
Subjects:
baryogenesis
CP violation
extreme chiral limit
vector-like quarks
weak-basis invariants
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Summary:We propose a minimal set of weak-basis invariants in an extension of the standard model (SM) where one up-type isosinglet vector-like quark is introduced, which allows us to obtain all the physical content of the CKM matrix. We present CP-odd invariants of lower order in mass than the one in the SM, which may have important consequences for Baryogenesis. We study the ECL, where the two lightest generations have vanishing mass, showing that in this extension, contrary to the SM, CP violation can be observed in collisions much above the electroweak scale.
ISSN:0954-3899
1361-6471
DOI:10.1088/1361-6471/acc349