Searching for New High Mass Phenomena Decaying to Muon Pairs using Proton-Proton Collisions at $\sqrt{s}$ = 13 TeV with the ATLAS Detector at the LHC

TL;DR

This paper reports a search for new high mass particles decaying into muon pairs using 13 TeV proton-proton collision data from the ATLAS detector, finding no deviations from the Standard Model and setting limits on potential new particles.

Contribution

First search for high mass phenomena in dimuon final states at 13 TeV with the ATLAS detector, establishing new exclusion limits on Z' resonances.

Findings

No significant deviations observed from the Standard Model.

Excluded Z' resonance masses below 4.0 TeV.

Set 95% credibility level limits on new physics parameters.

Abstract

We present a search for new high mass phenomena using the latest data collected by the ATLAS detector at the LHC, corresponding to 36.1 fb$^{-1}$ at $\sqrt{s}$ = 13 TeV. The search is conducted for both resonant and non-resonant new phenomena in dimuon final states. The dimuon invariant mass spectrum is the discriminating variable used in the search. No significant deviations from the Standard Model expectation are observed. Lower limits are set on the signal parameters of interest at 95% credibility level, using a Bayesian interpretation. In particular, a Sequential Standard Model Z' resonance is excluded for masses below 4.0 TeV.