Search for dark matter and other new phenomena in events with an energetic jet and large missing transverse momentum using the ATLAS detector

TL;DR

This paper reports a search for new physics phenomena, including dark matter and extra dimensions, using ATLAS detector data with events featuring energetic jets and missing transverse momentum, finding no significant deviations from the Standard Model.

Contribution

It presents the first results of a search for dark matter, extra dimensions, and supersymmetry in events with jets and missing energy at 13 TeV with the ATLAS detector.

Findings

No significant excess over Standard Model predictions.

Set exclusion limits on dark matter and extra dimension models.

Analyzed 36.1 fb^{-1} of proton-proton collision data.

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 36.1 fb${}^{-1}$ at a centre-of-mass energy of 13 TeV collected in 2015 and 2016 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 ($e$ or $\mu$). Several signal regions are considered with increasing requirements on the missing transverse momentum above 250 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 pair-produced weakly interacting dark-matter candidates, large extra spatial dimensions, and supersymmetric particles in several compressed scenarios.