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Article
Report number arXiv:2003.11956 ; CERN-EP-2019-219
Title Search for long-lived, massive particles in events with a displaced vertex and a muon with large impact parameter in pp collisions at s=13 TeV with the ATLAS detector
Author(s) ATLAS Collaboration  Show all 2951 authors
Corporate Author(s) ATLAS Collaboration
Publication 2020-08-14
Imprint 26 Mar 2020
Number of pages 30
Note 43 pages in total, author list starts on page 27, 8 figures, 6 tables, published in Phys. Rev. D 102, 032006 (2020). All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2018-33
In: Phys. Rev. D 102 (2020) 032006
DOI 10.1103/PhysRevD.102.032006
Subject category Particle Physics - Experiment ; hep-ex
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords supersymmetry ; experimental results
Abstract A search for long-lived particles decaying into hadrons and at least one muon is presented. The analysis selects events that pass a muon or missing-transverse-momentum trigger and contain a displaced muon track and a displaced vertex. The analyzed dataset of protonproton collisions at s=13 TeV was collected with the ATLAS detector and corresponds to 136 fb1. The search employs dedicated reconstruction techniques that significantly increase the sensitivity to long-lived particle decays that occur in the ATLAS inner detector. Background estimates for Standard Model processes and instrumental effects are extracted from data. The observed event yields are compatible with those expected from background processes. The results are presented as limits at 95% confidence level on model-independent cross sections for processes beyond the Standard Model, and interpreted as exclusion limits in scenarios with pair-production of long-lived top squarks that decay via a small R-parity-violating coupling into a quark and a muon. Top squarks with masses up to 1.7 TeV are excluded for a lifetime of 0.1 ns, and masses below 1.3 TeV are excluded for lifetimes between 0.01 ns and 30 ns.
Related document supersedes: ATLAS-CONF-2019-006
Copyright/License preprint: © 2019-2025 CERN (License: CC-BY-4.0)
publication: © 2019-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³



Corresponding record in: Inspire
Email contact: zhiqing.philippe.zhang@cern.ch


 Record created 2020-03-26, last modified 2024-06-13


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