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.
Highlights
We propose a two-stage strategy to search for new long-lived particles that could be produced at the Center for Nuclear Research (CERN) LHC, become trapped in detector material, and decay later
Using a benchmark of pair-produced longlived 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
If the gluinos were moving sufficiently slowly, they could become trapped in the removable inert material (RIM). (b) Detect: After the LHC run, the RIM is removed, the individual rods are separated, and they are placed in a cryostat filled with purified liquid argon (LAr)
Summary
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. One of the most intriguing scenarios explored in these searches for physics beyond the standard model is that of long-lived particles [1] produced in collisions and traveling in the detector before decaying.
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