Artigo
The 125 GeV boson: A composite scalar?
Fecha
2013-09-09Registro en:
Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 88, n. 5, 2013.
1550-7998
1550-2368
10.1103/PhysRevD.88.055008
2-s2.0-84884882770
2-s2.0-84884882770.pdf
Autor
DAFIS
Universidade Federal do Rio Grande do Sul (UFRGS)
Universidade Federal do ABC (UFABC)
Universidade Estadual Paulista (Unesp)
Resumen
Assuming that the 125 GeV particle observed at the LHC is a composite scalar and responsible for the electroweak gauge symmetry breaking, we consider the possibility that the bound state is generated by a non-Abelian gauge theory with dynamically generated gauge boson masses and a specific chiral symmetry breaking dynamics motivated by confinement. The scalar mass is computed with the use of the Bethe-Salpeter equation and its normalization condition as a function of the SU(N) group and the respective fermionic representation. If the fermions that form the composite state are in the fundamental representation of the SU(N) group, we can generate such a light boson only for one specific number of fermions for each group. We address the uncertainties underlying this result, when considering the strong dynamics in isolation. © 2013 American Physical Society.