Searching for `Bumps' in the Dilepton Invariant Mass Spectrum using \textsc{BumpHunter} in $pp$ collision at $\sqrt s = 13$ TeV with the ATLAS Detector

Additional massive $Z^{\prime}$ gauge bosons occur frequently in the extension of the Standard Model or its minimal supersymmetric extension. The discovery potential of this hypothetical spin$-1$ gauge boson is very high in the run-II of LHC and there is a high possibility of observing dilepton resonance in $2016$ data. The ATLAS experiment searches for proton-proton collisions where two high energy, same-flavour leptons are produced and analyses their invariant mass spectrum. The search incorporates several sophisticated tests to determine the significance of an observed excess. \\ \textsc{BumpHunter} is a model independent statistical test which searches for deviations in the data from the expected background. We study the sensitivity of \textsc{BumpHunter} for discovery in the $2016$ data set. In addition we study several methods, within the \textsc{BumpHunter} framework, for combining data from two channels ($ee, \mu\mu$) of different resolutions.