2018/06/18 by Alejandro Cabo, Jose Carlos Suarez, Cabo, Alejandro +8
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #hep-th
paper · pdf · doi:10.48550/arxiv.1806.06951
18 pages, 8 figures
arxiv created 2018/06/18 · openalex publication_date 2018/06/18 · arxiv updated 2018/06/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The possibility that the spontaneous symmetry breaking in the Standard Model (SM) may be generated by the Top-Higgs Yukawa interaction (which determines the so called "second minimum" in the SM) is examined. A former analysis is extended about a QCD action only including the Yukawa interaction of a single quark with a scalar field. We repeat the calculation of the two loop effective action of the model for the scalar field. A correction of the evaluation allowed choosing a strong coupling α(μ,ΛQCD)=0.2254 GeV at an intermediate scale μ=11.63 GeV, in order to fix the minimum of the potential at a scalar field determining 175 GeV for the quark mass. A scalar field mass m=44 GeV is following, which is of the order than the experimental Higgs mass. The effects of considering a running with momenta coupling are studied. For this, the finite part of the two loop potential contribution determined by the strong coupling, was represented as a momentum integral. Next, substituting in this integral the experimental values of the running coupling, the potential curve became very similar to the one for constant coupling. This happened after simply assuming that the low momentum dependence of the coupling is "saturated" to a constant value being close to its lowest experimental value.