"25.b. Distribution of leading jet neutral hadron energy fraction" of "Strategy and performance of the CMS long-lived particle trigger program in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV"

Distribution of the leading PF jet NHEF (right) in 2024 data (black circles), W$\to l\nu$ background simulation for 2024 conditions (red squares), and $H \to SS \to b\bar{b}b\bar{b}$ signal simulation for 2023 conditions (blue and purple triangles). Events are required to have $H_{\mathrm{T}} > 200\,\mathrm{GeV}$ and the leading jet is required to have $p_{\mathrm{T}} > 60\,\mathrm{GeV}$ and $|\eta| < 1.5$, which are equivalent to the respective HLT jet object selections. The signal distributions additionally require the leading jet to be matched to an LLP decaying anywhere inside the barrel calorimeter volume ($129 < R < 295\,\mathrm{cm}$). The clear separation between the displaced signal and the prompt background in the plot motivates the development of the CalRatio trigger.