Leveraging the ALICE/L3 cavern for long-lived exotics

Run 5 of the high-luminosity LHC era (and beyond) may provide new opportunities to search for physics beyond the standard model at interaction point 2. In particular, taking advantage of the existing ALICE detector and infrastructure provides an opportunity to search for displaced decays of beyond standard model long-lived particles. While this proposal may well be preempted by ongoing ALICE physics goals, examination of its potential new physics reach provides a compelling comparison with respect to other long-lived particle proposals. In particular, full event reconstruction and particle identification could be possible by making use of the existing L3 magnet and ALICE time projection chamber. For several well-motivated portals, the reach competes with or exceeds the sensitivity of MATHUSLA and SHiP, provided that a total integrated luminosity of approximately 100 fb-1 could be delivered to interaction point 2.