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  • Letter
  • Open Access

Detecting long-lived particles trapped in detector material at the LHC

Jan Kieseler*, Juliette Alimena, Jasmine Simms†, Thea Aarrestad, and Maurizio Pierini

Alexander Kish

  • European Center for Nuclear Research (CERN), CH 1211, Geneva 23, Switzerland

  • Fermi National Accelerator Laboratory Batavia, Illinois 60510, USA

  • *jan.kieseler@cern.ch
  • †Also at The University of Oxford, Oxford OX1 2JD, United Kingdom.
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Phys. Rev. D 105, L051701 – Published 4 March, 2022

DOI: https://doi.org/10.1103/PhysRevD.105.L051701

Abstract

We propose a two-stage strategy to search for new long-lived particles that could be produced at the CERN LHC, become trapped in detector material, and decay later. In the first stage, metal rods are exposed to LHC collisions in an experimental cavern. In the second stage, they are immersed in liquid argon at a different location, where out-of-time decays could be detected. Using a benchmark of pair-produced long-lived gluinos, we show that this experiment would have unique sensitivity to gluino-neutralino mass splittings down to 3 GeV, in previously uncovered lifetimes of days to years.

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Phys. Rev. D 105, L051701– Published 4 March, 2022
  • Received 9 November 2021
  • Accepted 2 February 2022
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