Muon Trigger Software StatusMuon Trigger Software Status

S. Spagnolo Dip. Fisica Univ. del Salento and INFN

Lecceon behalf of the

Muon Trigger Slice working group

March 27, 2008 – Muon Week – CERN

Muon Trigger Software Status 2

OutlineOutline

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

March 27, 2008 – Muon Week – CERN

Muon Trigger Software Status 3

Muon Slice performanceMuon Slice performanceFrom CSC Note – Muon Rates - Convolution method 12.0.6 trigger swLVL1 emulationmuFast+hypomuComb+hypoTrigMooreMSTrigMooreSATrigMooreCB+hypo

Pythia for b,c DPMJET for /K(conservative choice)large theoretical uncertaintiesat pT below 6 GeV

must focus on /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 Slice performance – Muon Trigger – Muon Trigger MenusMenus

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 SimulationLevel 1 Muon Trigger Simulation

LVL1 simulation is stable since a long timecan 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 investigationEnd 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 SimulationLevel 1 Muon Trigger Simulation

13.0.40.213.0.40.2

A problem in the EC forward region possibly related to a mismatch of the TGC cabling serviceused for the RDO production (digitization) and the LVL1 emulation

Reference datasetMuonRecValidator_trig1_misal1_valid1.005145.P

ythiaZmumu.econ.AOD.v13003003.aan.root

Test dataset MuonRecValidator_valid1_misal1_csc11.005145.Pythia

Zmumu.recon.AOD.v13004002.aan.root

LVL1 efficiency in 13.0.30.3 in good

agreement with 12.0.6.1 (CSC studies)

March 27, 2008 – Muon Week – CERN

Muon Trigger Software Status 7

Level 2 – muFast / muCombLevel 2 – muFast / muCombfrom 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

/k decays(rate Hz)

b +X(rate Hz)

c +X(rate Hz)

Standard Comb 3469 4853 5385

Loose xmatch 2895 (-16%) 4775 (-1.5%) 5385

+Tight x x pT

match 2799 (-20%) 4708 (-3.2%) 5385

+ID fit2 cut 2552 (-26%) 4559 (-6.0%) 5049 (-6.0%)

Forced minimum bias sample

b (4GeV)+Xbias sample

Unforced minimum bias sample

MU06 rate at 1033

standard Muon identification at level 2

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

MU06 eff

/k samples

MU04 eff

to go in the definition of muon trigger sequences for 14.1.0

March 27, 2008 – Muon Week – CERN

Muon Trigger Software Status 8

Level 2 – muFast / muCombLevel 2 – muFast / muComb

Total Rate mu4 at 1031 740 ± 28 (muFast) 557 ± 11(muComb) 433 ± 14(muComb+backExtrapolator) Hz/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/k decays 5.1 ± 0.8 3.5 ± 0.4 2.9 ± 0.4

Revised LVL2 low pT rates in 13.0.x Counting method with min. bias - Pythia 6.4

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 layersmostly recovered by muComb

1.05

CSC studies

muFast efficiency relative to LVL1 for single muons

March 27, 2008 – Muon Week – CERN

Muon Trigger Software Status 9

MuIsol - MuIsol - discrimination@LVL2 between muons from b/jets discrimination@LVL2 between muons from b/jets decays and isolated muons from W,Z decaysdecays and isolated muons from W,Z decays

Multivariate analysis of isolation variables in Lar/Tile (done) and ID (ongoing)seeded by LVL2 muFast or muComb for ≥ mu20optimization: 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 notehigh-lum. studies (i.e. pileup): waiting for datasets

HCALECA

L

μROI

Inner Cone

Outer Ring

ID

91% rejection at 95% efficiency w.r.t LVL1+LVL2 muFast BARREL

Lar/Tilebarrel 13.2.0stable w.r.t. 12.0.6

87% rejection at 95% efficiency w.r.t LVL1+LVL2 muFast EC

in Trigger Sequences since 13.0.x

∑pT in ring ΔR [0.05,0.2]∈

March 27, 2008 – Muon Week – CERN

Muon Trigger Software Status 10

TileMuidTileMuid

March 27, 2008 – Muon Week – CERN

Muon Trigger Software Status 11

Event Filter: Event Filter: follow up with the new Moore style for follow up with the new Moore style for

14.0.014.0.0 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)

March 27, 2008 – Muon Week – CERN

Muon Trigger Software Status 12

/K rejection at the Event Filter/K rejection at the Event Filter

single single

min.bias K

min.bias

K

From the CSC note

with current set of cuts (not extensively optimized)75% eff. @ 4GeV for (1-effBG)=35%

90% eff. @ 20GeV for (1-effBG)=25%

Inner Detector d0 ≤ 0.15ID n. of pixel hits ≥ 3ID n. of B layer hits ≥ 1ID n. of SCT hits ≥ 6pT (ID) / pT (SA) ≤ 1.25Combined match 2 ≤ 26

present cuts

to be implemented in a new hypo algorithm for 14.x.x

March 27, 2008 – Muon Week – CERN

Muon Trigger Software Status 13

Event Filter: Event Filter: TrigMoore in recent releases 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

12.0.613.0.30.3

TrigMooreCB w.r.t. muCombsingle muons

12.0.613.0.40.214.0.0 nightly

13.0.40.214.0.0 nightly

EFId w.r.t. muCombsingle muons

ZZ