Search for pairs of muons with small displacements in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Abstract

A search new phenomena giving rise to pairs of opposite electrically charged muons with impact parameters in the millimetre range is presented, using 139 fb${}^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collision data from the ATLAS detector at the LHC. The search targets the gap in coverage between existing searches targeting final states with leptons with large displacement and prompt leptons. No significant excess over the background expectation is observed and exclusion limits are set on the mass of long-lived scalar supersymmetric muon-partners (smuons) with much lower lifetimes than previously targeted by displaced muon searches. Smuon lifetimes down to 1 ps are excluded for a smuon mass of 100 GeV, and smuon masses up to 520 GeV are excluded for a proper lifetime of 10 ps, at 95% confidence level. Finally, model-independent limits are set on the contribution from new phenomena to the signal-region yields.

arXiv comment32 pages in total, author list starting page 15, 4 figures, 2 tables, published in Phys.Lett. B. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2020-09/

References in corpus (24)

• Parton distributions with LHC data
• Bounds on Universal Extra Dimensions
• R-parity violating supersymmetry
• Performance of the ATLAS Trigger System in 2015
• Production and Integration of the ATLAS Insertable B-Layer
• The Production of Charginos/Neutralinos and Sleptons at Hadron Colliders
• Muon reconstruction and identification efficiency in ATLAS using the full Run 2 $pp$ collision data set at $\sqrt{s}=13$ TeV
• Squark and gluino production cross sections in pp collisions at $\sqrt{s}$ = 13, 14, 33 and 100 TeV
• Bosonic Supersymmetry? Getting Fooled at the LHC
• ATLAS data quality operations and performance for 2015-2018 data-taking
• Performance of the ATLAS muon triggers in Run 2
• HistFitter software framework for statistical data analysis
• Searches for supersymmetric particles in e+e- collisions up to 208 GeV and interpretation of the results within the MSSM
• Search for electroweak production of charginos and sleptons decaying into final states with two leptons and missing transverse momentum in $\sqrt{s}=13$ TeV $pp$ collisions using the ATLAS detector
• Precision predictions for electroweak superpartner production at hadron colliders with Resummino
• Threshold resummation for gaugino pair production at hadron colliders
• RECAST: Extending the Impact of Existing Analyses
• ABCDisCo: Automating the ABCD Method with Machine Learning
• Search for gauge mediated SUSY breaking topologies in e+e- collisions at centre-of-mass energies up to 209GeV
• Neutralino/chargino pair production at NLO+NLL with resummation-improved PDFs for LHC Run II
• Mass Spectrum in R-Parity Violating mSUGRA and Benchmark Points
• Searches for Gauge-Mediated Supersymmetry Breaking Topologies in e+e- collisions at LEP2
• Search for supersymmetric particles in light gravitino scenarios and sleptons NLSP
• The new $(g-2{)}_{\mu }$ result and the $\mu \nu$SSM

Cited by in corpus (3)

• Conversion-Driven Leptogenesis: A Testable Theory of Dark Matter and Baryogenesis at the Electroweak Scale
• t-channel dark matter at the LHC -- a whitepaper
• Search for displaced leptons in $\sqrt{s}=13$ TeV and $13.6$ TeV $pp$ collisions with the ATLAS detector