Heavy resonances and the oblique parameters S and T

2023/09/18 by Ignasi Rosell, Rosell, Ignasi, Antonio Pich +3
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena

paper · pdf · doi:10.48550/arxiv.2309.09741

Abstract

It has been confirmed experimentally the existence of a mass gap between Standard Model (SM) and eventual Beyond Standard Model (BSM) fields. Therefore, the use of effective approaches to search for fingerprints of New Physics is very appealing. A non-linear realizations of the Electroweak Symmetry Breaking is considered here, where the Higgs is a singlet with free couplings and the SM fields are also coupled to bosonic heavy resonances. A one-loop-level calculation of the oblique S and T parameters is presented here. This analysis allows us to constrain resonance masses to be above the TeV scale, M_R > 3 TeV, in good agreement with our previous determinations, where these observables were computed with a more simplified Lagrangian.

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