FinalPhase2MuonTDRResults

Pre-approval slides: https://indico.cern.ch/event/655258/contributions/2668926/attachments/1498245/2332424/Phase2-GEM-Trigger_plots_Approval.pdf

Plots to be updated: https://twiki.cern.ch/twiki/pub/Main/FinalPhase2MuonTDRResults/Phase2-GEM-Trigger_plots_Approval_v2.pdf

Stub Reco efficiency at PU140: http://tahuang.web.cern.ch/tahuang/GEMCSCTrigger/CSCStubReco/

PU impact on stub reco efficiency (answer to convener's question): http://tahuang.web.cern.ch/tahuang/GEMCSCTrigger/StubRecoEff20170727_Version2/

Old results (with minor bugs): https://twiki.cern.ch/twiki/bin/view/Main/Phase2MuonTDRResultsAugust2017

Muon Trigger Acceptance

Single muon trigger acceptance

caption

The plots above contain dark SUSY events, generated by Madgraph, in which a higgs boson decays to two dark photons, One dark photon decays to 2 muons, while the other decays to 2 pions. Left: The barrel region is important for signatures with high pT muon pairs that require a single muon trigger. The acceptance of a single 30 GeV muon trigger is shown as function of eta at the second muon station of the leading muon. Right: The forward region is important for signatures with muon pairs of modest pT that require a double muon trigger. The acceptance of a double 10 GeV muon trigger is shown as function of eta at the second muon station of the most forward muon.

Double muon trigger acceptance

caption

The plots above contain dark SUSY events, generated by Madgraph, in which a higgs boson decays to two dark photons, One dark photon decays to 2 muons, while the other decays to 2 pions. Left: The barrel region is important for signatures with high pT muon pairs that require a single muon trigger. The acceptance of a single 30 GeV muon trigger is shown as function of eta at the second muon station of the leading muon. Right: The forward region is important for signatures with muon pairs of modest pT that require a double muon trigger. The acceptance of a double 10 GeV muon trigger is shown as function of eta at the second muon station of the most forward muon.

Resolution plots

Position resolution

caption

Position meansured by current CSC trigger primitives is determined by the halfstrip of comparator digi pattern in key layer. But it can be further improved by fitting comparator digis and then position after fit can be a fractional halfstrip. The plot shows the position meansurement precisions of CSC Trigger pritimives, before optimization (red) and after optimization (black), and of GEM trigger primitives. Before optimization current position meansurement precisions of CSC Trigger pritimives is worse than of GEM trigger pritimives and after optimization it is better.

Direction resolution

caption

The direction measurement precisions at station 1 and station 2 by using different detectors. Direction measured by ME21+GE21(black) is largely improved copmared to the one by ME21 CSC alone(red) and is comparable to the one by ME11+GE11(blue). This improvement from GE21 installation can not only help prompt muon trigger control trigger rate but also make hybrid algorithm for displaced muon trigger possible, since hybrid algorithm utilizes both positions and directions. The Displaced muons in Dark SUSY sample is used to show the performance.

Prompt Muon Trigger (L1Mu Trk and Standalone)

ME21 Reco efficiency

This plot is to answer the Convener's question:" why does L1Mu trigger efficiency in high PU scenario significantly degrade ".

caption in TDR

Page 3 top left

The efficiency of L1Mu loose (seed for L1Mu Trk Trigger)

The two lines are L1Trk +L1Mu inputs in phase-2 trigger, for CSC+GE11+GE21(solid square) and CSC+GE11(empty square) scenario respectively. Any L1Mu are accepted as inputs of L1Trk +L1Mu. (EMTF does not include ME0 stubs in track building yet and we expect that using ME0 hits can further improve L1Mu reco efficiency)

caption in TDR

Page 4 top left

Need to highlight GE11 region (1.65<|eta|<2.15). The blue square represents the CSC+GE11 scenario but only performance of GE11 region is shown. Peformance in high eta region (|eta|>2.15) for CSC+GE11 should be the same as for CSC only(red triangle).

The two squares are Phase-2 standalone L1Mu for CSC+GE11+GE21+ME0(solid black square) and CSC+GE11(empty blue square) scenario respectively. The empty blue square requires hits in ME11 and GE11-ME11 bending angle cut. The requirement for solid blue square is more elaborated: 1) |eta|<2.15, if both GE11-ME11 and GE21-ME21 bending angles are available, an ellipse cut is applied; 2) |eta|<2.15, if only GE11-ME11 bending angle is available, then only GE11-ME11 bending angle cut is applied; 3)2.1<|eta|<2.15, only GE21-ME21 bending angle is available, then GE21-ME21 bending angle cut is applied. 4) |eta|>2.15, 99% ME0 bending angle cut is applied

The red triangle represents the scenario with CSC only and EMTF quality is required to be at least 12. It illustrates the Run-2 L1Mu trigger configuration performance at PU200, without any new detectors nor any aging.

Caption in TDR

Page 4 top right

Need to highlight GE11 region (1.65<|eta|<2.15). The blue square represents the CSC+GE11 scenario but only performance of GE11 region is shown. Peformance in high eta region (|eta|>2.15) for CSC+GE11 should be the same as for CSC only(red triangle). For |eta|>2.1, EMTF does not include ME0 stubs in track building yet and we expect that using ME0 hits can further improve L1Mu reco efficiency

This figure illustrates the trigger efficiency as a function of simulated eta. The corrsponding explanantion are mentioned in above figure.

caption in TDR

Page 5 top left

This plot shows the trigger rate as a function of trigger pT threshold for different scenarios at PU200

caption in TDR

The following plot is used in slides but not in TDR now.

Page 5 top right

This figure illustrates the trigger efficiency as a function of true muon pT, in 1.65<|eta|<2.15.

Not included in TDR yet

Page 6 top left

caption in TDR

Page 6 top right

This figure illustrates the trigger efficiency as a function of true muon pT, in 2.15<|eta|<2.4.

caption in TDR

Page 7 top left

Trigger rate as a function of L1Mu Trigger pT threshold and it shows that GE21 installation can help control trigger rate if even 30% ME11 CSC is not functioning.

The dark blue square represents CSC+GE11 without aging: L1Mu with hits in ME11 and applying GE11-ME11 bending angle cut

The faint blue square represents the CSC+GE11 with CSC aging scenario: L1Mu with hits in ME11 and applying GE11-ME11 bending angle cut to 70% muons

The grey square represents the CSC+GE11+GE21 with CSC aging scenario: L1Mu with hits in ME11 and bending angle cuts is described as mentioned below

caption in TDR

The figure shows the trigger rate as a function of trigger pT threshold. installing GE21 can help recover forward muon triggering capability back to ideal situation of CSC+GE11 even if 30% ME11 CSC are not functioning due to operational issues

Page 8 top left

Trigger rate as a function of trigger efficiency. Here trigger efficinecy is average efficiency over muons with sim pT between [threhsold*1.1, threshold*1.1+3] (take both efficiencies at turn-on and plateau into consideration). And trigger efficiency is uniform in phi (comments: add proper title and text on plot to make it selfexplanatory)

CSC+GE11:, no aging (dark blue), L1Mu with hits in ME11 and GE11-ME11 bending angle cut

CSC+GE11: 30% aging (faint blue),L1Mu with hits in ME11 and, only with 70% chance, GE11-ME11 bending angle cut is applied (because even if GE11-ME11 bending angle is not measurable due to aging, GE11 hits or ME11 hits should still have high efficiencies and so hits in station1 is always required)

CSC+GE11+GE21: no aging (dark red), L1Mu with hits in ME11 and bending angle cuts are described as follow:

1) if both GE11-ME11 and GE21-ME21 bending angles are available, an ellipse cut is applied;

2) if only GE11-ME11 bending angle is available, then only GE11-ME11 bending angle cut is applied;

3) if |eta|>2.1 and only GE21-ME21 bending angle is available, GE21-ME21 bending angle cut is applied (To maintain high efficiency)

CSC+GE11+GE21: 30% aging (faint red), namely with 30% chance, GE11-ME11 bending angle is not measurable but either ME11 hits or GE11 hits are found. It requires L1Mu with hits in ME11 or GE11, for 70% events, it applied same cut as mentioned in no aging case, on the other hand, for left 30% event, only GE21-ME21 bending angle cut is applied and hits in station 1 is also required.

caption in TDR

Displaced Muon Trigger (L1Mu: no vertex constraint, displaced)

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Page 10 top left

This figure illustrates the trigger rate as a function of eta at 2nd CSC station. The trigger rate at |eta| around 2.1 is relative high since GE11,rather than ME0 is still used in eta around 2.1 when ME0 stub is missing. The correct way to estimate trigger rate is that only ME0 stubs can be used for eta above 2.1

The empty blue square repsents the trigger estiamtion for position-based algorithm(no vetex contraint) after only GE11 is installed. The full black square repsents the peformance of hybrid algorihtm(positions and directions) by using Phase-2 detecors(CSC+GE11+GE21+ME0).

caption in TDR

The caption in TDR should explain the position and direction measurements. Also add the rate suppresion factors for loose/medium/tightt

Page 10 top right

This figure shows the trigger efficiency as function of eta at 2nd CSC station

caption in TDR

Page 11 top left

This plot illusrates the trigger rate as a function of trigger pT threshold for CSC+GE11(empty blue square) and CSC+GE11+GE21+ME0 (full black square), in 1.65<|eta|<2.1.

comments: drop GE11 in empty blue square since adding GE11 on top of CSC detectors only contributes little to trigger rate when Position based algorithm is used??

caption in TDR (together with following 3 plots)

Page 11 top right

This figure shows the displaced muon trigger efficiency as a function of true muon pT, in 1.65<|eta|<2.1.

Page 12 top left

This plot illusrates the displaced muon trigger rate as a function of trigger pT threshold for CSC+GE11(empy blue square) and CSC+GE11+GE21+ME0 (full black square), in 2.1<|eta|<2.4

Update the legend and caption: Phase-1+GE11->Phase-1. The empty blue square represents the trigger rate before installing ME0 and GE21 and the main contribution is from high eta region. GE11 has little impact on trigger rate here.

Page 12 top right

This figure shows the displaced muon trigger efficiency as a function of true muon pT, in 2.1<|eta|<2.4.

Page 13 top left

correct style and select more conservtive colors

triangle, empty square, filled square, use colors black, blue, red, use fewer bins so it is not that jumpy. try to make this with PU200 samples

Page 13 top right

triangle, empty square, filled square, use colors black, blue, red, use fewer bins so it is not that jumpy. try to make this with PU200 samples and new BMtf trigger, make markers largers, where are horiz. error bars?

caption in TDR

Displaced Muon Trigger Rate reduction

caption

Trigger rate reduction for loose, medium and tight veto for the displaced muon trigger versus muon pseudo-rapidity.

-- SvenDildick - 2017-07-31