GE1/1 detection efficiencies at 13.6 TeV

Muon detection efficiencies of the GE1/1 detectors with early Run 3 data. Muons reconstructed as standalone muons are used to test the GE1/1 detection efficiency. The selected tracks have \linebreak pT\nolinebreak $\;\si>20$\nolinebreak GeV, have at least one segment in the CSC ME1/1 detector, and $\chi^2/DOF$ in range $[ 0.5 \textrm{,} \, 2 ]$. The muon tracks are propagated to the GE1/1 detector surface. For each propagated track, the best compatible GEM reconstructed hit is looked for. The efficiency is defined as the ratio between the number of propagated hits on the active surface of the detector and the number of propagated hits matching with GEM hits within $\mid\textrm{R}\times\Delta\phi\mid < 5\;$ mm. The detectors were operated at $690~$uA of equivalent divider current. Expressing the high voltage working point in terms of equivalent divider current allows the description of the seven GEM electrodes voltages with a single value. It represents the voltage at which each of the seven electrodes would be, had the detector been powered through the GEM resistor divider at a given equivalent divider current. No correction for GEM misalignment with respect to CSC is applied.\\ For the study it was used a muon dataset enriched with muons from Z boson decay amounting for a total recorded luminosity of $1830\;\si\textrm{pb}^{-1}$.