Muon Trigger Software Status

1
Muon Trigger Software Status

• S. Spagnolo
• Dip. Fisica Univ. del Salento and INFN Lecce
• on behalf of the
• Muon Trigger Slice working group

2
Outline

• Muon Slice performance (CSC note results)
• Rates and Trigger Menus
• Level 1 Muon Trigger simulation
• Studies in recent releases / development plans
• Level 2
• MuFast / MuComb / MuIsol / MuTileId
• Performance after 12.0.6 new functionalities
• Event Filter
• Current performance
• TrigMoore evolution TrigMuonEF
• General items data conversion / robustness /
  cablings
• Online integration for Milestone Data Acquisition

3
Muon Slice performance
From CSC Note Muon Rates - Convolution method
12.0.6 trigger sw LVL1 emulation muFasthypo muCom
bhypo TrigMooreMS TrigMooreSA TrigMooreCBhypo
Pythia for b,c?? DPMJET for p/K?? (conservative
choice) large theoretical uncertainties at pT
below 6 GeV
must focus on p/K?? rejection at low pT
mu6 needs prescaling at 1033
mu20/40 need isolation or prescaling at 1034
4
Muon Slice performance Muon Trigger Menus

• A lot of effort has been put in cross checking
  the trigger rate estimated with the convolution
  method and the with the counting method (on min.
  bias Pythia 6.4 samples)
• a basic agreement is observed taking into account
  the different theory input for p/K rates
• Based on estimated trigger rates the muon trigger
  menus have been defined for 1031 and 1032

5
Level 1 Muon Trigger Simulation

• LVL1 simulation is stable since a long time
• can be configured with a given choice of the
  thresholds (only 6 available in the hw)
• however it depends on Rpc and Tgc Cabling Svc
  (area of intensive development)
• Recent areas of investigation
• End Cap high rate regions located and masked from
  13.x.0 (1 eff loss for 20 fake rate rejection)

• High rates (from eff x PhysRate) in the barrel
  at low pT
• (related to muons in EC triggered by the RPC
  system)

6
Level 1 Muon Trigger Simulation
Test dataset MuonRecValidator_valid1_misal1_csc11
.005145.PythiaZmumu.recon.AOD.v13004002.aan.root

Reference dataset MuonRecValidator_trig1_misal1_va
lid1.005145.PythiaZmumu.econ.AOD.v13003003.aan.roo
t
LVL1 efficiency in 13.0.30.3 in good agreement
with 12.0.6.1 (CSC studies)
A problem in the EC forward region possibly
related to a mismatch of the TGC cabling
service used for the RDO production
(digitization) and the LVL1 emulation
13.0.40.2
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Level 2 muFast / muComb
standard Muon identification at level 2

• from 12.0.6 to 13.0.x
• general optimization of muComb matching cuts
• use of a back-extrapolator tool to refine the
  matching
• criteria between the
• muFast track with an
• ID track

Forced minimum bias sample
b ? m(4GeV)X bias sample
Unforced minimum bias sample
p/k decays (rate Hz) b ? mX (rate Hz) c ? mX (rate Hz)
Standard mComb 3469 4853 5385
Loose ?x? match 2895 (-16) 4775 (-1.5) 5385
Tight ?x? x pT match 2799 (-20) 4708 (-3.2) 5385
ID fit c2 cut 2552 (-26) 4559 (-6.0) 5049 (-6.0)
MU06 rate at 1033

• incremental cut application leads to 26 gain in
  fake reduction with 6 loss for prompt m

MU06 eff
MU04 eff
p/k?? samples

• to go in the definition of muon trigger sequences
  for 14.1.0

8
Level 2 muFast / muComb
Revised LVL2 low pT rates in 13.0.x
Counting method with min. bias - Pythia 6.4

• Total Rate mu4 at 1031 740 28 (muFast) 557
  11(muComb) 433 14(muCombbackExtrapolator) Hz
• p/k decays 224 15 210
  6 145 9
• --------------------------------------------------
  --------------------------------------------------
  -------------------------------
• Total Rate mu6 at 1033 20.9 1.6
  13.8 0.7 12.4 0.8
  kHz
• p/k decays 5.1 0.8
  3.5 0.4 2.9 0.4

CSC studies
Problems under investigation in 12.0.6 high
muFast efficiency for mu20 at very low pT
apparently related to super-point in the BIx/EIx
chambers not associated to the segments in
middle/external layers mostly recovered by muComb
?? 1.05
muFast efficiency relative to LVL1 for single
muons
9
MuIsol - discrimination_at_LVL2 between muons from
b/jets decays and isolated muons from W,Z decays
in Trigger Sequences since 13.0.x

• Multivariate analysis of isolation variables in
  Lar/Tile (done) and ID (ongoing)
• seeded by LVL2 muFast or muComb for mu20
• optimization CALO (barrel OK, EC on-going), ID
  (on-going)
• performances on-going on 13.2.0/14.X.0
• for barrel and EC - 12.0.6 barrel in CSC note
• high-lum. studies (i.e. pileup) waiting for
  datasets

Lar/Tile barrel 13.2.0 stable w.r.t. 12.0.6
?pT in ring ?R?0.05,0.2
91 rejection at 95 efficiency w.r.t LVL1LVL2
muFast BARREL
87 rejection at 95 efficiency w.r.t LVL1LVL2
muFast EC
10
TileMuid
11
Event Filter follow up with the new Moore style
for 14.0.0

• A new package Trigger/TrigAlgorithms/TrigMuonEF
  hosts 4 HLTalgorithms
• TrigMuonEFSegmentFinder wrapper for
  MooSegmentCombinationFinder (offline tool
  invoqued with vector of pointers to prd
  collections) DONE
• TrigMuonEFTrackFinder wrapper for the offline
  tool MuonCombiTrackMaker (invoqued with vector of
  pointers to segment combination)
  DONE
• TrigMuonEFExtrapolator wrapper for
  MuidBackTracker DONE
• TrigMuonEFCombiner wrapper TO BE DONE for
  the main tool of MuidCB (COMING SOON ?)
• Running in 14.x.0 nightly builds - producing
  standalone EF muons propagated to the IP
• Most work is just in configuration from a very
  first look at the performance in comparison with
  old TrigMoore and offline Moore some
  mis-configuration of the tools has been
  identified
• The new chain (up to the available
  implementation) will be in 14.1.0
• needs to define temporary extra muon trigger
  sequences to be run concurrently with the
  standard EF (TrigMoore)
• needs to revise the trigger AOD for the EF (add a
  segmentCollection object)

12
p/K rejection at the Event Filter
From the CSC note
present cuts
Inner Detector d0 0.15 ID n. of pixel hits
3 ID n. of B layer hits 1 ID n. of SCT
hits 6 pT (ID) / pT (SA)
1.25 Combined match c2 26
single m
single p??
min.bias p/K??
min.bias p/K??
to be implemented in a new hypo algorithm for
14.x.x

• with current set of cuts (not extensively
  optimized)
• 75 eff. _at_ 4GeV for (1-effBG)35
• 90 eff. _at_ 20GeV for (1-effBG)25

13
Event Filter TrigMoore in recent releases

• a drop of the CB trigger eff. at low pT has been
  observed in 13.0.30 recovered in 14.x.0
  nightlies appears related to EFID rather than
  Muon Algos
• Stable eff. at high pT
• Stable resolutions

EFId w.r.t. muComb single muons
13.0.40.2
14.0.0 nightly
TrigMooreCB w.r.t. muComb single muons
12.0.6
13.0.40.2
14.0.0 nightly
12.0.6
13.0.30.3
Z???