We consider the standard model without the Higgs boson, where the Goldstone modes are described by a nonlinear sigma model. We study the renormalization group flow of the sigma model coupling f and of the electroweak parameters S and T. The condition that the couplings reach a fixed point at high energy leaves the low energy values of f and T arbitrary (to be determined experimentally) and fixes S to a value compatible with electroweak precision data.
Electroweak S and T Parameters from a Fixed Point Condition / Fabbrichesi, M; Percacci, Roberto; Tonero, A; Vecchi, L.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 107:2(2011). [10.1103/PhysRevLett.107.021803]
Electroweak S and T Parameters from a Fixed Point Condition
Percacci, Roberto;
2011-01-01
Abstract
We consider the standard model without the Higgs boson, where the Goldstone modes are described by a nonlinear sigma model. We study the renormalization group flow of the sigma model coupling f and of the electroweak parameters S and T. The condition that the couplings reach a fixed point at high energy leaves the low energy values of f and T arbitrary (to be determined experimentally) and fixes S to a value compatible with electroweak precision data.| File | Dimensione | Formato | |
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