Search for new phenomena in final states with an energetic jet and large missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV using the ATLAS detector

TL;DR

This paper reports a search for new physics phenomena in proton-proton collisions at 13 TeV, focusing on events with an energetic jet and large missing transverse momentum, finding no significant deviations from the Standard Model.

Contribution

It presents the first results of a search for new phenomena in this final state at 13 TeV with the ATLAS detector, setting exclusion limits on various beyond Standard Model theories.

Findings

No significant excess over Standard Model predictions.

Exclusion limits set for models with extra dimensions, dark matter, and supersymmetry.

Data consistent with Standard Model expectations.

Abstract

Results of a search for new phenomena in final states with an energetic jet and large missing transverse momentum are reported. The search uses proton--proton collision data corresponding to an integrated luminosity of 3.2 fb${}^{-1}$ at $\sqrt{s}=13$ TeV collected in 2015 with the ATLAS detector at the Large Hadron Collider. Events are required to have at least one jet with a transverse momentum above 250 GeV and no leptons. Several signal regions are considered with increasing missing-transverse-momentum requirements between $E_{\rm T}^{\rm miss} >250$ GeV and $E_{\rm T}^{\rm miss} > 700$ GeV. Good agreement is observed between the number of events in data and Standard Model predictions. The results are translated into exclusion limits in models with large extra spatial dimensions, pair production of weakly interacting dark-matter candidates, and the production of supersymmetric particles in several compressed scenarios.