Search for a high mass SM-like Higgs boson in the H to ZZ to llqq decay channel in CMS

TL;DR

This paper reports a search for a high-mass SM-like Higgs boson decaying into ZZ to llqq at CMS, using 19.7 fb^{-1} of 8 TeV data, setting limits due to no observed signal.

Contribution

It introduces a search strategy for high-mass Higgs bosons in the llqq decay channel at CMS, including interference effects with the 125 GeV Higgs.

Findings

No evidence of a high-mass Higgs signal was observed.

Upper limits were set on the production cross section.

The analysis constrains models with electroweak singlet Higgs bosons.

Abstract

A search for a high mass standard-model-like Higgs boson decaying into two Z bosons with subsequent decay into two leptons and two quarks performed at CMS is presented. The analysis is based on 19.7 1/fb of proton-proton collisions produced in LHC at center-of-mass energy of 8 TeV. Different categories are exploited in order to isolate hypothetical Higgs boson-like signals in the mass range up to 1 TeV. The data are interpreted in terms of a standard-model-like Higgs boson as well as an electroweak singlet, visible through the interference with the 125 GeV Higgs boson. No evidence of a signal is found and upper limits are set on the production cross section and other model parameters.