A fast processor for dilepton triggers

ψproduction inp¯NandπAkerlof1, Areti2, Binkley3 et al. 1993Phys. Rev. DSelf Cite381190View full textAdd to dashboardCite

“…The first level fast dimuon trigger required at least two threefold coincidences among aligned counters in each of the three muon hodoscope planes, at least two hits in the charged particle hodoscope, and a p or T-signal from the beam tagging system. Events which satisfied the fast trigger were then sent to a dedicated second level ECL-CAMAC trigger processor [7] which kept only candidates with an effective mass greater than 2.0 G~v / c~.…”

Measurement ofJψandψ′production in 300-GeV/cproton, antiproton, andAntoniazzi1, Arenton2, Cao3 et al. 1992Phys. Rev. DSelf Cite

“…The first level required that two or more muon triple coincidences be present in different quadrants in a given event. The second level consisted of a trigger processor [3], which processed hits from drift chambers downstream of the spectrometer analysis magnet to find tracks pointing at the muon counter triple coincidences. These tracks were used to form a crude dimuon mass under the assumption that each track originated in the target.…”

“…Ratio of J/+do/dx, differential cross sections for a-, (b) a ' , (c) proton, and (dl antiproton interactions. The (a) at to a-data sample and (b) a to proton data sample.curves are fits to Eq (3). of the text.…”

Measurement of Hadronically Produced $^3P$ State Charmonium at $\sqrt{s}$ = 23.7-GeV

“…The first level was a fast ( 10 ns decision time) set of pipeline logic which looked for two well defined muons in different quadrants of the muon detector. When the fast dimuon trigger was satisfied a second level, trigger processor (25], took over to stiffen the selection criteria for the dimuon event. The trigger processor used the information from the triple concidences to define a "road" in which to look for hits in the x and x' views of the downstream drift chambers.…”

“…The filter program served to verify the trigger and to perform a more accurate mass calculation for the triggering muons. The algorithm used by the filter was similar to that used by the dimuon trigger processor as described in chapter 2 and reference [25]. written to tape for subsequent analysis.…”