Zobrazeno 1 - 10
of 549
pro vyhledávání: '"Branco, G"'
Autor:
Alves, João M., Branco, G. C., Cherchiglia, A. L., Nishi, C. C., Penedo, J. T., Pereira, Pedro M. F., Rebelo, M. N., Silva-Marcos, J. I.
Publikováno v:
Physics Reports 1057 (2024) 1-69
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 that can be tested in experiments at LHC and High-Luminosity LHC.
Externí odkaz:
http://arxiv.org/abs/2304.10561
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-Smirnov relation, which suggests a connection between the CKM and PMNS m
Externí odkaz:
http://arxiv.org/abs/2304.06747
Autor:
Bettinotti, Branco G M1 (AUTHOR) brancobettinotti@gmail.com, Tegegn, Mickias B2 (AUTHOR), Razuk, Victor3 (AUTHOR), Bailey, Som4 (AUTHOR), Hann, Rowena2 (AUTHOR), Mendoza, Cesar5 (AUTHOR), Calfa, Marian T6 (AUTHOR), Colombo, Rosario A3,7 (AUTHOR)
Publikováno v:
Oxford Medical Case Reports. Oct2024, Vol. 2024 Issue 10, p1-4. 4p.
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 content of the CKM matrix. We present CP-odd invariants of lower orde
Externí odkaz:
http://arxiv.org/abs/2210.14248
We put forward the conjecture that the small numbers in the $V_\text{CKM}$ matrix, are generated by physics beyond the Standard Model. We identify as small numbers $V_{ub}$ and the strength of CP violation, measured by $|\text{Im}Q|$, where $Q$ stand
Externí odkaz:
http://arxiv.org/abs/2207.14235
Autor:
Botella, Francisco J., Branco, G. C., Rebelo, M. N., Silva-Marcos, J. I., Bastos, José Filipe
We propose a minimal extension of the Standard Model where an up-type vector-like quark, denoted $T$, is introduced and provides a simple solution to the CKM unitarity problem. We adopt the Botella-Chau parametrization in order to extract the $4\time
Externí odkaz:
http://arxiv.org/abs/2111.15401
We point out that hints of deviations from unitarity in the first row of the CKM matrix may be explained by the presence of a single vector-like top. We study how the stringent experimental constraints arising from CP Violation in the kaon sector and
Externí odkaz:
http://arxiv.org/abs/2103.13409
Autor:
Albergaria, Francisco1 (AUTHOR), Branco, G. C.1 (AUTHOR), Bastos, José Filipe1 (AUTHOR) jose.bastos@tecnico.ulisboa.pt, Silva-Marcos, J. I.1 (AUTHOR)
Publikováno v:
European Physical Journal C -- Particles & Fields. Jun2024, Vol. 84 Issue 6, p1-5. 5p.
We consider seesaw type-I models including at least one (mostly-)sterile neutrino with mass at the eV scale. Three distinct situations are found, where the presence of light extra neutrinos is naturally justified by an approximately conserved lepton
Externí odkaz:
http://arxiv.org/abs/1912.05875