Global Analysis of Experimental Constraints on a Possible Higgs-Like Particle with Mass ~ 125 GeV

TL;DR

This paper conducts a comprehensive global analysis of experimental data from multiple collider experiments to constrain the properties of a Higgs-like particle around 125 GeV, exploring deviations from the Standard Model and alternative theoretical scenarios.

Contribution

It provides the first combined analysis of constraints on a Higgs-like particle considering both standard and non-standard couplings, including composite and pseudo-Nambu-Goldstone boson models.

Findings

Constraints on deviations from Standard Model Higgs couplings.

Limits on pseudo-dilaton and pseudo-Nambu-Goldstone boson scenarios.

Compatibility of experimental data with various theoretical models.

Abstract

We perform a global analysis of the constraints on a possible Higgs-like particle with mass ~ 125 GeV that are provided by the ATLAS, CDF, CMS and D0 experiments. We combine the available constraints on possible deviations from the Standard Model Higgs couplings to massive vector bosons and to fermions, considering also the possibilities of non-standard loop-induced couplings to photon and gluon pairs. We analyze the combined constraints on pseudo-dilaton scenarios and on some other scenarios in which the possible new particle is identified as a pseudo-Nambu-Goldstone boson in a composite electroweak symmetry-breaking sector.