Search for displaced leptons in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector

Abstract

A search for charged leptons with large impact parameters using 139 fb${}^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collision data from the ATLAS detector at the LHC is presented, addressing a long-standing gap in coverage of possible new physics signatures. Results are consistent with the background prediction. This search provides unique sensitivity to long-lived scalar supersymmetric lepton-partners (sleptons). For lifetimes of 0.1 ns, selectron, smuon and stau masses up to 720 GeV, 680 GeV, and 340 GeV are respectively excluded at 95% confidence level, drastically improving on the previous best limits from LEP.

30 pages in total, author list starting page 15, 2 figures, 2 tables, published in PRL. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2018-14

References in corpus (17)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Simplified Models for a First Characterization of New Physics at the LHC
• 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
• Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• HistFitter software framework for statistical data analysis
• Searches for electroweak production of charginos, neutralinos, and sleptons decaying to leptons and W, Z, and Higgs bosons in pp collisions at 8 TeV
• Searching for Directly Decaying Gluinos at the Tevatron
• Search for long-lived particles that decay into final states containing two electrons or two muons in proton-proton collisions at sqrt(s) = 8 TeV
• Search for Displaced Supersymmetry in events with an electron and a muon with large impact parameters
• ABCDisCo: Automating the ABCD Method with Machine Learning
• Search for long-lived particles using displaced jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Mass Spectrum in R-Parity Violating mSUGRA and Benchmark Points
• Search for long-lived, massive particles in events with a displaced vertex and a muon with large impact parameter in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Performance of the reconstruction of large impact parameter tracks in the inner detector of ATLAS
• Search for R-parity violating supersymmetry with displaced vertices in proton-proton collisions at sqrt(s) = 8 TeV

Cited by in corpus (20)

• Primordial black holes from an electroweak phase transition
• Publishing statistical models: Getting the most out of particle physics experiments
• Search for heavy neutral leptons in decays of $W$ bosons using a dilepton displaced vertex in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• Confronting Dark Matter Freeze-In during Reheating with Constraints from Inflation
• The ATLAS Trigger System for LHC Run 3 and Trigger performance in 2022
• SModelS v2.3: enabling global likelihood analyses
• Search for long-lived particles decaying to leptons with large impact parameter in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Search for direct pair production of supersymmetric partners of $\tau$ leptons in the final state with two hadronically decaying $\tau$ leptons and missing transverse momentum in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Solar constraints on captured electrophilic dark matter
• Mixed modulus and anomaly mediation in light of the muon $g-2$ anomaly
• Energetic long-lived particles in the CMS muon chambers
• Status of searches for electroweak-scale supersymmetry after LHC Run 2
• Conversion-Driven Leptogenesis: A Testable Theory of Dark Matter and Baryogenesis at the Electroweak Scale
• Dark matter and radiative neutrino masses in conversion-driven scotogenesis
• t-channel dark matter at the LHC -- a whitepaper
• Model Characterization and Dark Matter in the Secluded $U(1{)}^{\prime }$ Model
• Search for displaced leptons in $\sqrt{s}=13$ TeV and $13.6$ TeV $pp$ collisions with the ATLAS detector
• Searching for Gluino LSP at the LHC
• Probing displaced top quark signature at the LHC Run 3
• Freeze-in Leptogenesis via Dark-Matter Oscillations