Banca de DEFESA: WILLIAM DE CARVALHO VIEIRA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : WILLIAM DE CARVALHO VIEIRA
DATA : 16/06/2020
HORA: 14:00
LOCAL: Por participação remota.
TÍTULO:

Fermions hierarchy problem and the symmetry breaking consequences in a 331 model

PÁGINAS: 140
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Física
SUBÁREA: Física das Partículas Elementares e Campos
RESUMO:

We discuss the fermions hierarchy problem as Yuwaka coupling as masses based on a
symmetry group SU(3)c ⊗ SU(3)L ⊗ U(1)X. The 3-3-1 model is developed in such way that
scalar sector will be minimal. The symmetry breaking is gotten to triplets, and the scalar
spectrum has two neutral Higgs, the lighter is defined as Standard Model Higgs. In other
hand, for the minimal fields contents, it is impossible every fermions getting mass, from
only renormalizable operator, because a quiral symmetry is remained. To quiral symmetry
breaking, we introduce 5-dimensional operators. Moreover, a natural supression is observed
for leptons masses and quarks-like up of Standard Model. Sush supression is gotten through
the small mixture angles between third families from quarks with another. However, to
quarks-like down this hierarchy do not remained.
We build second version of the model, impose a escale invariance, in which, only adimensionals coupling constants are allowed in the model. So, we propose a minimal model
with more one scalar singlet and a family of the leptons and quarks triplets and anti-triplets
of quarks, like vector character in order to generate massa to every fermions without 5-
dimensional operators. Furthermore, the symmetry breraking is gotten via radiative correction, from Coleman-Weinberg mechanism. This model we have increase a discrete symmetry
Z8, in order to restrict the sclarar and Yukawa interactions. So, we observate that a global symmetry U(1)N arise. A residual symmetry arise when the symmetry formed between
U(1)N and U(1)B is broken and phenomenological implication is remained as stabilization
from lighter particle in TeV scale.

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 1544374 - ALEX GOMES DIAS
Membro Titular - Examinador(a) Interno ao Programa - 1260948 - MARCOS DONIZETI RODRIGUES SAMPAIO
Membro Titular - Examinador(a) Externo ao Programa - 3057567 - CHEE SHENG FONG
Membro Titular - Examinador(a) Externo à Instituição - CARLOS PIRES - UFPB
Membro Titular - Examinador(a) Externo à Instituição - VICENTE PLEITEZ
Membro Suplente - Examinador(a) Interno ao Programa - 1574260 - ROLDAO DA ROCHA JUNIOR
Membro Suplente - Examinador(a) Externo ao Programa - 2211564 - ANDRE PANIAGO LESSA
Membro Suplente - Examinador(a) Externo à Instituição - PAULO SÉRGIO RODRIGUES DA SILVA
Membro Suplente - Examinador(a) Externo à Instituição - PEDRO CUNHA DE HOLANDA - UNICAMP