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Muon HLT: status of the algorithms and performance
Sergio Grancagnolo
for the Muon HLT group
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Summary
• Performances– Efficiencies of muFast, muComb, TrigMoore
– Efficiencies and pT resolutions for MuidSA and MuidCB
• EF– Comparison TrigMuonEF vs TrigMoore– TRT only chains: comparison with all ID
reconstruction
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LVL2: muFast efficiency wrt LVL1
e322_s461_r534 OFLCOND-SIM-00-00-03
e322_s461_r535 known problems of the real detector(dead channels, noisy channels, etc.)
vs. pT vs. eta
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LVL2: muComb efficiency wrt LVL1
vs. pT vs. eta
e322_s461_r534e322_s461_r535
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EF: MS reconstruction wrt LVL2
vs. pT vs. eta
e322_s461_r534e322_s461_r535
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EF: Muon extrapolated and combined reconstruction wrt LVL2
e322_s461_r534e322_s461_r535
Extrapolation Combination
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Muon EF: pT resolution
Extrapolation Combination
e322_s461_r534e322_s461_r535
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TrigMuonEF - Introduction• Validation of TrigMuonEF wrt TrigMoore performance
• Based on AODs produced in 14.2.20, bugfix + tags to fix bug #39808 – MuonRdoToPrepData-01-03-14– RecExCond-00-01-39– MuonRecExample-00-13-20
• Only mu6 (TrigMoore) and mu6_ef (TrigMuonEF) enabled – Consistent threshold cuts at L2
• valid3.005200.T1_McAtNlo_Jimmy.digit.RDO.e322_s46
• ~19k ttbar events 8
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Efficiency vs eta TrigMoore
TrigMuonEF
Effi
cien
cy Effi
cien
cy
Extrapolator (MuidStandalone)MS extrapolated @IP
Combined (MuidCombined)
Efficiency w.r.t. L2 muComb
9
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Turn-on curves
No cuts
pT > 6 GeV
pT > 20 GeV
pT > 40 GeV
Full circles = TrigMoore
Open circles = TrigMuonEF
Efficiency w.r.t. L2 muComb
Effi
cienc
y
pt pt
pt pt
Effi
cienc
y
Effi
cienc
y Effi
cienc
y
Extrapolatorbarrel
Extrapolatorendcaps
Combinedendcaps
Combinedbarrel
10
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Fake and good tracks
Extrapolation
Combined Extrapolation
Combined
fakes good
fakes good
fakes good
fakes good
mu0 196 (2.1%)
9040
80 (0.8%)
9034
228 (2.5%)
9062
71 (0.8%)
9066
mu6 129 (1.4%)
8933
74 (0.8%)
8970
142 (1.6%)
8928
61(0.7%)
8994
mu20
22 (0.4%)
5919
8 (0.1%)
5951
29 (0.5%)
5905
6 (0.1%)
5953
18600 ttbar events
Same R (<0.1) cut for both extrapolation and combined
R distributionextrapolator
R distributioncombined
TrigMoore
TrigMuonEF
TrigMoore
TrigMuonEF
TrigMoore TrigMuonEF
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eta-phi resolutions vs pt• Each resolution (eta,phi) at vertex is comparable• The TrigMuonEF Extrapolator has worse phi resolution than
TrigMooreTrigMuonEF extrapolator
TrigMoore extrapolator
TrigMuonEF combined
TrigMoore combined
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pT Resolutions
TrigMoore
TrigMuonEF
• The TrigMuonEF Extrapolator has sligthly better pT resolution than TrigMoore for pT<40GeV
pt pt
PT
reso
luti
on
PT
reso
luti
onExtrapolator (MuidStandalone) Combined (MuidCombined)
13
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14
LVL2 ID tracking with TRT
Using TRTSegFinder_Muon on a cosmic runNo tracks combinedNeed to pass to the cosmic configuration for ID algos
• muComb code with TRT only ready (TrigmuComb-00-00-42)
• Not yet in the release• Require a LVL2 chain under
developement
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Setup to run TrigMuonEF with TRT only
• Tested on val,rel_2,14.2.30 (last week) with testMuonSliceAthenaModernRDO.py on tt events
• Tags required – Reconstruction/MuonIdentification/MuidCombinedTools-00-03-01– Trigger/TrigAlgorithms/TrigMuonEF-00-00-48
• Instead of– TrigEFIDInsideOut_Muon()– TrigMuonEFCombinerConfig()
use– TrigEFIDOutsideInTRTOnly_Muon()– TrigMuonEFCombinerConfigTRTOnly()
within Trigger/TriggerCommon/TriggerMenuPython/python/Muon.py • TrigMuonEFCombiner configured with
– MuidMatchMaker.MatchTrtTracks = True– self.IdTracks = "InDetTrigTrackSlimmerTRTOnly_Muon_EFID"
• ID tracks name changed from InDetTrigParticleCreation_Muon_EFID to InDetTrigParticleCreationTRTOnly_Muon_EFID
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Comparison TRT only / all ID
• Number of TRT hits shown– More TRT only tracks reconstructed
Entries 4365Entries 4143
All ID
Tracks that do not reack TRT
TRT only
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Comparison TRT only / all ID (II)
• eta distribution for MS-ID combined tracks– Fake TRT only tracks killed in combination– Lost tracks are outside the TRT acceptance
Entries 811Entries 884
All ID TRT only
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Conclusions
• Muon HLT is performing well
• Transition to TrigMuonEF ready– To be enabled the pT hypo algo if requested
• First results with TRT only tracks encouraging– To complete configuration for LVL2