Speaker
Description
This poster presents the search for a heavy boson resonance decaying into a
pair of Z bosons leading to a 4l final state, where l stands for either an
electron or a muon. The search uses proton–proton collision (Run-2) data at a
centre-of-mass energy of 13 TeV collected with the ATLAS detector during 2015
and 2016 at the LHC. This study aims at answering the important question
whether the SM Higgs particle is part of an extended scalar sector — as
postulated by various extensions to the SM, which predict additional Higgs-
like bosons, motivating searches in an extended range of mass. The results of
this study for an hypothetical heavy resonance are presented in the mass range
between 200 GeV and 1200 GeV. We look for an excess in the distribution of the
4l invariant mass, in case there is no significant excess, the results are also
interpreted as limits on the production rate of the signal hypothesis obtained
from a fit to the mass distribution.
