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. Muon Trigger Software Status
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 new functionalities
Event Filter
Current performance
TrigMoore evolution TrigMuonEF
General items: data conversion / robustness / cablings
Online integration for Milestone Data Acquisition
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status

3. Muon Slice performance
From CSC Note – Muon Rates - Convolution method trigger sw
LVL1 emulation
muFast+hypo
muComb+hypo
TrigMooreMS
TrigMooreSA
TrigMooreCB+hypo
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
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status

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
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status

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)
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status

6. Level 1 Muon Trigger Simulation
Test dataset
MuonRecValidator_valid1_misal1_csc PythiaZmumu.recon.AOD.v aan.root
Reference dataset
MuonRecValidator_trig1_misal1_valid PythiaZmumu.econ.AOD.v aan.root
LVL1 efficiency in in good agreement with (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
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status

7. Muon Trigger Software Status
Level 2 – muFast / muComb
standard Muon identification at level 2
from 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  m+X
c  m+X
Standard mComb
3469
4853
5385
Loose x match
2895 (-16%)
4775 (-1.5%)
+Tight x x pT match
2799 (-20%)
4708 (-3.2%)
+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
MU04 eff
MU06 eff
to go in the definition of muon trigger sequences for
p/k samples
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status

8. Muon Trigger Software Status
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 ± 28 (muFast) 557 ± 11(muComb) 433 ± 14(muComb+backExtrapolator) Hz
p/k decays ± ± ± 9
Total Rate mu6 at ± ± ± kHz
p/k decays ± ± ± 0.4
CSC studies
Problems under investigation:
in 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
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status

9. Muon Trigger Software Status
MuIsol - 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 /14.X.0
for barrel and EC barrel in CSC note
high-lum. studies (i.e. pileup): waiting for datasets
HCAL
ECAL
μROI
Inner Cone
Outer Ring ID
Lar/Tile
barrel
stable w.r.t
∑pT in ring ΔR∈[0.05,0.2]
91% rejection at 95% efficiency w.r.t LVL1+LVL2 muFast BARREL
87% rejection at 95% efficiency w.r.t LVL1+LVL2 muFast EC
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status

10. Muon Trigger Software Status
TileMuid
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status

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
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)
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status

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% 4GeV for (1-effBG)=35%
90% 20GeV for (1-effBG)=25%
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status

13. Event Filter: TrigMoore in recent releases
a drop of the CB trigger eff. at low pT has been observed in – 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
nightly
TrigMooreCB w.r.t. muComb
single muons
12.0.6
nightly
12.0.6
Z
March 27, 2008 – Muon Week – CERN
Muon Trigger Software Status