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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/75380
Title: 
125 GeV scalar boson and SU(NTC)⊗ - SU(3) L⊗ - U(1)X models
Author(s): 
Institution: 
  • Universidade Tecnológica Federal Do Paraná-UTFPR-DAFIS
  • Universidade Federal do ABC (UFABC)
  • Universidade Estadual Paulista (UNESP)
ISSN: 
  • 1550-7998
  • 1550-2368
Abstract: 
We verify that SU(N)TC⊗ - SU(3) L⊗ - U(1)X models, where the gauge symmetry breaking is totally dynamical and promoted by the non-Abelian technicolor group and the strong Abelian interactions, are quite constrained by the LHC data. The theory contains a T quark self-energy involving the mixing between the neutral gauge bosons, which introduces the coupling between the light and heavy composite scalar bosons of the model. We determine the lightest scalar boson mass for these models from an effective action for composite operators, assuming details about the dynamics of the strong interaction theories. Comparing the value of this mass with the ATLAS and CMS observation of a new boson with a mass M∼125 GeV and considering the lower bound determined by the LHC Collaboration on the heavy neutral gauge boson (Z′) present in these models, we can establish constraints on the possible models. For example, if SU(N)TC≡SU(2)TC, with technifermions in the fundamental representation, the model barely survives the confrontation with the LHC data. © 2013 American Physical Society.
Issue Date: 
10-May-2013
Citation: 
Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 87, n. 9, 2013.
Source: 
http://dx.doi.org/10.1103/PhysRevD.87.095004
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/75380
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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