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Gauge extensions of the Standard Model: generating natural masses for neutrinos and charged leptons

Grant number: 17/23027-2
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): March 01, 2018
Effective date (End): February 28, 2022
Field of knowledge:Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
Principal researcher:Alex Gomes Dias
Grantee:Julio Rafael da Silva Leite
Home Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
Associated scholarship(s):19/04195-7 - Low-scale neutrino mass generation mechanisms from TeV scale gauge extensions of the Standard Model, BE.EP.PD


The generation of neutrino masses and the mass hierarchy among the different fermion families are some of the most important problems left unanswered by the Standard Model. The search for consistent explanations for these and other questions has led to the proposal of several Standard Model extensions. A more complete theory can be obtained by extending the original gauge group to $SU(3)_c \otimes SU(M)_L \otimes SU(N)_R \otimes U(1)_X$. The cases with $M=3$ ($N=1$) and $M=N=3$, in particular, contain various attractive features, such as the fact that the number of fermion families is fixed to be three, and the possibility of explaining the parity violation in the Standard Model as a dynamical process. In this research project, making use of the inner advantages of such models, we will explore possible solutions for the open questions mentioned above. In particular, we will focus on building and analyzing models that lead to the needed symmetry breaking and mass generation patterns through minimal scalar sectors, which are more relevant from a phenomenological viewpoint.

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DIAS, ALEX G.; LEITE, JULIO; GONCALVES, V, DIEGO S. Axion-neutrino interplay in a gauged two-Higgs-doublet model. Physical Review D, v. 104, n. 7 OCT 12 2021. Web of Science Citations: 0.
ALVARADO, CARLOS; BONILLA, CESAR; LEITE, JULIO; VALLE, JOSE W. F. Phenomenology of fermion dark matter as neutrino mass mediator with gauged B-L. Physics Letters B, v. 817, JUN 10 2021. Web of Science Citations: 0.
DIAS, ALEX G.; LEITE, JULIO; VALLE, JOSE W. F.; VAQUERA-ARAUJO, CARLOS A. Reloading the axion in a 3-3-1 setup. Physics Letters B, v. 810, NOV 10 2020. Web of Science Citations: 0.
DIAS, ALEX G.; LEITE, JULIO; SANCHEZ-VEGA, B. L.; VIEIRA, WILLIAM C. Dynamical symmetry breaking and fermion mass hierarchy in the scale-invariant 3-3-1 model. Physical Review D, v. 102, n. 1 JUL 23 2020. Web of Science Citations: 0.
DIAS, ALEX G.; LEITE, JULIO. Natural quark mixing and inverse seesaw in a left-right model with an axion. Journal of High Energy Physics, n. 5 MAY 15 2019. Web of Science Citations: 0.
DIAS, A. G.; LEITE, J.; LOPES, D. D.; NISHI, C. C. Fermion mass hierarchy and double seesaw mechanism in a 3-3-1 model with an axion. Physical Review D, v. 98, n. 11 DEC 10 2018. Web of Science Citations: 5.

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