Searches for Higgs bosons in pp collisions at sqrt(s) = 7 and 8 TeV in the context of four-generation and fermiophobic models

TL;DR

This paper reports searches for Higgs bosons in extended models using proton-proton collision data at 7 and 8 TeV, excluding certain mass ranges for both SM4 and fermiophobic Higgs scenarios, and finds the observed 125 GeV boson is inconsistent with these models.

Contribution

It provides the first combined search results for Higgs bosons in SM4 and fermiophobic models at 7 and 8 TeV, excluding specific mass ranges and testing compatibility with the observed boson.

Findings

Excluded SM4 Higgs in 110-600 GeV range at 99% CL

Excluded fermiophobic Higgs in 110-147 GeV range at 95% CL

Observed boson near 125 GeV is inconsistent with both models

Abstract

Searches are reported for Higgs bosons in the context of either the standard model extended to include a fourth generation of fermions (SM4) with masses of up to 600 GeV or fermiophobic models. For the former, results from three decay modes (tau tau, WW, and ZZ) are combined, whilst for the latter the diphoton decay is exploited. The analysed proton-proton collision data correspond to integrated luminosities of up to 5.1 inverse femtobarns at 7 TeV and up to 5.3 inverse femtobarns at 8 TeV. The observed results exclude the SM4 Higgs boson in the mass range 110-600 GeV at 99% confidence level (CL), and in the mass range 110-560 GeV at 99.9% CL. A fermiophobic Higgs boson is excluded in the mass range 110-147 GeV at 95% CL, and in the range 110-133 GeV at 99% CL. The recently observed boson with a mass near 125 GeV is not consistent with either an SM4 or a fermiophobic Higgs boson.