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Paper detail

The electroweak S and T parameters from a fixed point condition

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.

preprint2011arXivOpen access
M. FabbrichesiR. PercacciA. ToneroL. Vecchi
hep-phhep-th
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M. FabbrichesiR. PercacciA. ToneroL. Vecchi

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