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Dynamical symmetry breaking in Standard Model extensions involving gauge group U(1)

Grant number: 22/10785-4
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): November 01, 2022
Effective date (End): August 31, 2024
Field of knowledge:Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
Principal Investigator:Alex Gomes Dias
Grantee:Vinicius Padovani
Host Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil


Although the Standard Model's spontaneous symmetry breaking mechanism furnishes results consistent with the experimental data on the Higgs boson, there exist arguments pointing out that it should arise from a more structured model describing physics in energy scales higher than the electroweak one. This research project proposes an investigation of Standard Model extensions in which spontaneous symmetry breaking originates from radiative corrections according to the Coleman-Weinberg mechanism. Our focus will be on the construction and phenomenological analysis of extensions of the Standard Model with U(1)_X abelian gauge symmetries, under which putative right neutrinos carry different charges. It requires the introduction of singlet scalar fields under the symmetry group of the Standard Model and whose expected values in vacuum break the U(1)_X symmetry. Among our motivations is to discover the interrelationship between dynamic symmetry breaking via the Coleman-Weinberg mechanism and the generation of mass for neutrinos in these models would be. We also intend to evaluate the experimental constraints on the Z^{\prime} boson in the models and to perform a phenomenological analysis of the spectrum of scalars.

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