[HTML][HTML] Vector-like singlet quarks: A roadmap
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 effects …
years, interest in VLQs has been increasing, due to their contributions to new physics effects …
The CKM phase and in Nelson-Barr models
A Valenti, L Vecchi - Journal of High Energy Physics, 2021 - Springer
A bstract We analyze the Nelson-Barr approach to the Strong CP Problem. We derive the
necessary conditions in order to simultaneously reproduce the CKM phase and the quark …
necessary conditions in order to simultaneously reproduce the CKM phase and the quark …
Revisiting the minimal Nelson-Barr model
K Murai, K Nakayama - Journal of High Energy Physics, 2024 - Springer
A bstract We revisit the minimal Nelson-Barr model for solving the strong CP problem
through the idea of spontaneous CP breaking. The minimal model suffers from the quality …
through the idea of spontaneous CP breaking. The minimal model suffers from the quality …
Super-soft CP violation
A Valenti, L Vecchi - Journal of High Energy Physics, 2021 - Springer
A bstract Solutions of the Strong CP Problem based on the spontaneous breaking of CP
must feature a non-generic structure and simultaneously explain a coincidence between a …
must feature a non-generic structure and simultaneously explain a coincidence between a …
Flavor invariants for the SM with one singlet vector-like quark
ELF de Lima, CC Nishi - Journal of High Energy Physics, 2024 - Springer
A bstract We study the flavor invariants of the SM augmented by one singlet vector-like
quark. Aided by the Hilbert series, we construct all the basic invariants with which any flavor …
quark. Aided by the Hilbert series, we construct all the basic invariants with which any flavor …
Flavor constraints for a vector-like quark of Nelson-Barr type
A bstract The Nelson-Barr (NB) mechanism to solve the strong CP problem assumes CP
conservation, arranges vanishing\(\overline {\theta}\) at tree-level and requires vector-like …
conservation, arranges vanishing\(\overline {\theta}\) at tree-level and requires vector-like …
Explicit parametrization of more than one vectorlike quark of Nelson-Barr type
Nelson-Barr models solve the strong CP problem based on spontaneous CP violation and
generically require vectorlike quarks (VLQs) mixing with standard quarks to transmit the CP …
generically require vectorlike quarks (VLQs) mixing with standard quarks to transmit the CP …
Reducing Complex Phases and other Subtleties of CP Violation
JF Bastos, JI Silva-Marcos - arxiv preprint arxiv:2407.07158, 2024 - arxiv.org
When extending the SM, eg 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 …
than one CP violating complex phases. In this work, we develop a method useful in reducing …
Baryon asymmetric Universe from spontaneous CP violation
A bstract Spontaneous CP violation, such as the Nelson-Barr (NB) mechanism, is an
attractive scenario for addressing the strong CP problem while realizing the observed phase …
attractive scenario for addressing the strong CP problem while realizing the observed phase …
Leptonic CP violation from a vector-like lepton
A bstract Leptonic CP violation is yet to be confirmed as an additional source of CP violation
in fundamental interactions. We study the case where leptonic CP violation is spontaneous …
in fundamental interactions. We study the case where leptonic CP violation is spontaneous …