Reconstructing Higgs boson properties from the LHC and Tevatron data

TL;DR

This paper performs a comprehensive fit to Higgs boson data from multiple experiments, analyzing various scenarios including non-standard couplings and invisible decays, and discusses implications for beyond Standard Model physics.

Contribution

It provides the first global fit allowing all Higgs couplings and branching ratios to vary freely, revealing preferences for certain non-standard scenarios and constraining invisible decays.

Findings

Standard Model Higgs at 125 GeV fits data well

Non-standard scenarios improve fit by explaining anomalies

Data disfavors Higgs invisible decays

Abstract

We perform a phenomenological fit to all ATLAS, CMS, CDF and D0 Higgs boson data available after Moriond 2012. We allow all Higgs boson branching fractions, its couplings to standard model particles, as well as to an hypothetical invisible sector to vary freely, and determine their current favourite values. The standard model Higgs boson with a mass 125 GeV correctly predicts the average observed rate and provides an acceptable global fit to data. However, better fits are obtained by non-standard scenarios that reproduce anomalies in the present data (more \gamma\gamma{} and less WW signals than expected), such as modified rates of loop processes or partial fermiophobia. We find that present data disfavours Higgs boson invisible decays. We consider implications for the standard model, for supersymmetric and fermiophobic Higgs bosons, for dark matter models, for warped extra-dimensions.