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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Hierarchical fermions and detectable Z ` from effective two-Higgs-triplet 3-3-1 model

Texto completo
Barreto, E. R. [1] ; Dias, A. G. [1] ; Leite, J. [1] ; Nishi, C. C. [2] ; Oliveira, R. L. N. [1] ; Vieira, W. C. [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210580 Santo Andre, SP - Brazil
[2] Univ Fed ABC, Ctr Matemat Comp & Cognicao, BR-09210580 Santo Andre, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Physical Review D; v. 97, n. 5 MAR 29 2018.
Citações Web of Science: 4

We develop a SU(3)(C) circle times SU(3)(L) circle times U(1)(X) model where the number of fermion generations is fixed by cancellation of gauge anomalies, being a type of 3-3-1 model with new charged leptons. Similarly to the economical 3-3-1 models, symmetry breaking is achieved effectively with two scalar triplets so that the spectrum of scalar particles at the TeV scale contains just two CP even scalars, one of which is the recently discovered Higgs boson, plus a charged scalar. Such a scalar sector is simpler than the one in the Two Higgs Doublet Model, hence more attractive for phenomenological studies, and has no flavor changing neutral currents (FCNC) mediated by scalars except for the ones induced by the mixing of Standard Model (SM) fermions with heavy fermions. We identify a global residual symmetry of the model which guarantees mass degeneracies and some massless fermions whose masses need to be generated by the introduction of effective operators. The fermion masses so generated require less fine-tuning for most of the SM fermions and FCNC are naturally suppressed by the small mixing between the third family of quarks and the rest. The effective setting is justified by an ultraviolet completion of the model from which the effective operators emerge naturally. A detailed particle mass spectrum is presented, and an analysis of the Z' production at the LHC run II is performed to show that it could be easily detected by considering the invariant mass and transverse momentum distributions in the dimuon channel. (AU)

Processo FAPESP: 13/22079-8 - Física de partículas e campos: modelo padrão e suas extensões
Beneficiário:Adriano Antonio Natale
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 14/19164-6 - Desafios para o século XXI em física e astrofísica de neutrinos
Beneficiário:Orlando Luis Goulart Peres
Linha de fomento: Auxílio à Pesquisa - Temático