Transcript Document

Muon Trigger Software Status
S. Spagnolo
Dip. Fisica Univ. del Salento and INFN Lecce
on behalf of the
Muon Trigger Slice working group
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
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Muon Slice performance
From CSC Note – Muon Rates - Convolution method
12.0.6 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
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mu6 needs
prescaling at 1033
Muon Trigger Software Status
mu20/40 need isolation
or prescaling at 1034
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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
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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)
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Level 1 Muon Trigger Simulation
Test dataset
MuonRecValidator_valid1_misal1_csc11.005145.PythiaZmumu.
recon.AOD.v13004002.aan.root
Reference dataset
MuonRecValidator_trig1_misal1_valid1.005145.PythiaZ
mumu.econ.AOD.v13003003.aan.root
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
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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
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criteria between the MU06 rate at 10
muFast track with an Standard Comb
Loose x match
ID track
incremental cut
application leads to
26 % gain in fake
reduction with 6%
loss for prompt 
to go in the definition of
muon trigger sequences
for 14.1.0
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Forced minimum
bias sample
b  (4GeV)+X
bias sample
p/k decays
(rate Hz)
b  +X
(rate Hz)
Unforced minimum
bias sample
c  +X
(rate Hz)
3469
4853
5385
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%)
MU04 eff
MU06 eff
p/k samples
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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(muComb+backExtrapolator) 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
 1.05
apparently related to super-point in the BIx/EIx
chambers not associated to the segments in
middle/external layers
mostly recovered by muComb
muFast efficiency relative to LVL1 for single muons
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MuIsol -
discrimination@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
μROI
Inner
Cone
HCAL
ID
Lar/Tile
barrel 13.2.0
stable w.r.t. 12.0.6
Outer
Ring
ECAL
∑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
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TileMuid
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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)
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p/K rejection at the Event Filter
From the CSC note
present cuts
Inner Detector d0
ID n. of pixel hits
ID n. of B layer hits
ID n. of SCT hits
pT (ID) / pT (SA)
Combined match c2
≤ 0.15
≥3
≥1
≥6
≤ 1.25
≤ 26
single 
min.bias
p/K
to be implemented in
a new hypo algorithm
for 14.x.x
single p
min.bias
p/K
with current set of cuts (not extensively optimized)
75% eff. @ 4GeV for (1-effBG)=35%
90% eff. @ 20GeV for (1-effBG)=25%
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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
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
Stable eff. at high pT
Stable resolutions
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Z
Muon Trigger Software Status
12.0.6
13.0.30.3
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