Limit on Higgs boson trilinear self-coupling in coupled technicolor models

Abstract

The trilinear self-coupling of the Higgs boson, in a theory in which this boson is composite, is compared to the experimental bound of this quantity obtained by the CMS experiment. In the case of a model where technicolor (TC) is coupled to QCD, we find that the experimental result already constrains the dynamics of the theory, which is represented by an expression of the technifermion self-energy typical of technicolor coupled models, and function of the dynamically generated technifermion mass and two other parameters that describe the technifermion dynamical mass momentum dependence. The limits imposed on this dynamics allow us to make a simple determination of pseudo-Goldstone boson masses that appear in these theories, indicating that these bosons may be expected to be quite massive.

Composite scalar bosons masses: Effective potential versus Bethe-Salpeter approach

“…In the last section of this work, we include the determination of the lightest pseudo scalar mass M Π 0 ≈ 309GeV , that confirms the estimate presented in Ref. [38]. Charged and colored technifermions will not only have larger masses than the neutral technifermion(N), but also more radiative corrections to their masses, and we can expect even larger masses for these colored and charged pseudo scalar bosons.…”

“…Moreover, we determine the mass obtained for the lightest pseudo scalar boson, Π 0 ∼ N N and we retrieve the result described in Ref. [38], assuming the Bethe-Salpeter equations.…”