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. 2015 Mar 13;75(3):120. doi: 10.1140/epjc/s10052-015-3325-9

Table 1.

Level-1 pT thresholds and muon triggers. The sequence shows the requirements at Level-1, in the event-filter or at higher level trigger which then includes Level-2. The requirements at Level-2 are omitted for the single- and multi-muon triggers, as they are looser than those in the event-filter. The applied pT and isolation requirements are also shown

Level-1 pT threshold (GeV) Number of layers in coincidence
MU4 4 2 (3 in limited areas in the endcap region)
MU6 6 2 (3 in the endcap region)
MU10 10 2 (3 in the endcap region)
MU11 10 3
MU15 15 3
MU20 20 3
Single muon trigger Level-1 Event-filter
mu6 MU6 One or more combined-muon with pT>6 GeV
mu13 MU10 One or more combined-muon with pT>13 GeV
mu18 MU15 One or more combined-muon with pT>18 GeV
mu24i MU15 One or more combined-muon with pT>24 GeV and ΣΔR<0.2pTtrk/pT<0.12
mu36 MU15 One or more combined-muon with pT>36 GeV
mu40_SA_barrel MU15 One or more stand-alone-muon with pT>40 GeV in |η|<1.05
Multi muon trigger Level-1 Event-filter
2mu13 Two MU10 Two or more combined-muons with pT>13 GeV (two or more mu13 triggers)
mu18_mu8_FS MU15 One or more combined-muon with pT>18 GeV (mu18 trigger), and two or more full-scan muons with pT>18 and >8 GeV
3mu6 Three MU6 Three or more muons with pT>6 GeV (three or more mu6 triggers)
J/ψ tag-and-probe trigger Level-1 High level trigger
mu18_J/ψ_FS MU15 (Level-2) One or more combined-muon with pT>18 GeV
(Event-filter) One or more combined-muon with pT>18 GeV, and
at least one pair of combined-muons with a mass consistent with that of J/ψ
mu18_J/ψ_L2 MU15, MU4 (Level-2) Two or more combined-muons with pT>18, 4 GeV, and
at least one pair of combined-muons with a mass consistent with that of J/ψ
(Event-filter) One or more combined-muon with pT>18 GeV