Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-12-22
Phys.Rev.D81:055005,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages
Scientific paper
10.1103/PhysRevD.81.055005
We investigate the fermions of the standard model without a Higgs scalar. Instead, we consider a non-local four-quark interaction in the tensor channel which is characterized by a single dimensionless coupling $f$. Quantization leads to a consistent perturbative expansion for small $f$. The running of $f$ is asymptotically free and therefore induces a non-perturbative scale $\Lambda_{ch}$, in analogy to the strong interactions. We argue that spontaneous electroweak symmetry breaking is triggered at a scale where $f$ grows large and find the top quark mass of the order of $\Lambda_{ch}$. We also present a first estimate of the effective Yukawa coupling of a composite Higgs scalar to the top quark, as well as the associated mass ratio between the top quark and the W boson.
Schwindt Jan-Markus
Wetterich Christof
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