New Higgs interactions and recent data from the LHC and the Tevatron

Understand

We perform a multi-parameter global analysis of all data available till date from the ATLAS, CMS and Tevatron experiments, on the signals of a Higgs boson, to investigate how much scope exists for departure from the standard model prediction.

• We adopt a very general and model-independent scenario, where separate deviations from standard model values are possible for couplings of the observed scalar with up-and down-type fermions, W-and Z-boson pairs, as well as gluon and photon pair effective interactions.
• An arbitrary phase in the coupling with the top-pair, and the provision for an invisible decay width for the scalar are also introduced.
• After performing a global fit with seven parameters, we find that their values at 95% confidence level can be considerably different from standard model expectations.