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Muon Event Filter and Trigger Menu @ L=10 31 cm -2 s -1

Muon Event Filter and Trigger Menu @ L=10 31 cm -2 s -1. Sergio Grancagnolo Università del Salento & INFN Lecce on behalf of the Muon Event Filter working group. Outline. Muon EF algorithm implementation for rel.13.x.x EF performance studies resolutions/efficiencies rates

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Muon Event Filter and Trigger Menu @ L=10 31 cm -2 s -1

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  1. Muon Event Filter and Trigger Menu @ L=1031cm-2s-1 Sergio Grancagnolo Università del Salento & INFN Lecce on behalf of the Muon Event Filter working group

  2. Outline • Muon EF algorithm implementation for rel.13.x.x • EF performance studies • resolutions/efficiencies • rates • Trigger menus for LHC startup • Status of m from p decay studies • Muon EF Monitoring (for validation/DQ) ATLAS Trigger & Physics week

  3. Seeding Algorithms assume the seed is from LVL2 or a LVL1 ROI Full functionality in barrel and end-caps 3 istances of TrigMoore called by the steering, for reconstruction in the MS, extrapolation to the IP and combination with ID tracks TrigMoore attaches to the TE a "TrigMooreFeature" for each ROI, accessed by TrigMooreHypo for pT test TrigMoore records in SG the TrigMooreFeature per each ROI and all reconstructed tracks in the event in a single container for conversion in Trk:Track format and subsequent output in ESD and AOD TrigMoore – a reminder • Two different running modes: • Seeded • Reconstruction performed only in the geometrical regions provided by the RoIs of previous levels. • Full scan • Full reconstruction, ~equivalent to the offline working mode LVL1 LVL2 (muFast) LVL2 ID LVL2 (muComb) Seeding Algs Moore Algs Hypo Alg TrigMoore MuIdStandAlone Algs Hypo Alg MuIdCombined Algs Hypo Alg Offline ID ATLAS Trigger & Physics week

  4. MuonEF in Rel 13.0.10 • Migration to new HLT Steering (DONE) • Both FEX and Hypothesis algorithms • Migration to Configurables (DONE) • TrigMoore configurables py classes available in 3 flavours (MuonSpectrometer, Extrapolated and Combined Tracks) • New style EF muon sequences (including ID) added in TrigHypothesis/TrigMuonHypo • Migration to new EDM (DONE) • TrigMoore uses the standard reconstruction input object (PrepRawData). • The Moore offline algorithm organization has been adopted also by TrigMoore • Use of EF version of ID for combined MS-ID tracks (DONE) • MuidCombined adapted to get as input EF-ID tracks. • Replacement of the previous implementation in wich EF ID and offline ID (New Tracking or iPatRec) was used. ATLAS Trigger & Physics week

  5. MuonEF in Rel 13.0.10 (II) • Implementation of REGTESTs for Monitoring and Validation (DONE) • Definition of jobOptions to include Muon EF in ATN test (DONE) • Bug Fix • Fix for duplicated python modules in genConf • DONE- to be collected right after 13.0.10 • Problem in Persistification (appeared in 13.0.X nightly) • Fixed in 13.0.10 ATLAS Trigger & Physics week

  6. EF Performance studies ATLAS Trigger & Physics week

  7. Sample and releases • Single mu sample centrally simulated on lcg-dq grid (CSC production) • mixed charge • pT from 2 to 200 GeV/c • Reconstruction with a dedicated sw chain in 12.0.6 • Muon Trigger slice only • LVL1 emulation, (100% of the statistics processed with standard LVL1 configuration, part of the low pt points re-processed with low thresholds) • LVL2: mufast, IDscan, muComb • EF(seeded by LVL2): trigmoore + EF ID algo • Hypothesis algorithms disabled • Private AA NTuple production using grid tools (GANGA) on Napoli Tier2 storage elements (mostly by Napoli group) • Used for both LVL1 (Napoli, Tokyo) and EF (Lecce, Napoli) studies • Main goal: CSC note efficiency, resolution, single muon trigger rates ATLAS Trigger & Physics week

  8. Efficiency and resolution curves (standard LVL1 configuration) barrel EF MuId Combined efficiency curves w.r.t. LVL2 (muComb) 6 GeV8 GeV 20 GeV40 GeV pT(GeV) barrel EF resolutions MuidStandAlone TrigMoore MuidCombined ATLAS Trigger & Physics week pT(GeV)

  9. EF MuId CombinedResolutions Overlap Endcap Very Fwd All ATLAS Trigger & Physics week

  10. Other EF Muon Trigger rates ATLAS Trigger & Physics week

  11. EF Efficiency curves (for low pt regime) EF (MuId CB) efficiency w.r.t. LVL2 (muComb) barrel barrel “4 GeV” 5 GeV 3 5 3 5 pT(GeV) pT(GeV) pT threshold at 4 GeV corresponds to a totally open LVL1 window – EF effective threshold is 3 GeV/c pT threshold at 5 GeV has a cut lowered by 2 times the resolution corresponding at 5 GeV (as for higher thresholds) ATLAS Trigger & Physics week

  12. Low pT thresholds single muon rates Luminosity: L = 1031cm-2s-1 ATLAS Trigger & Physics week

  13. Trigger Menus Proposal for L=1031 cm-2s-1 ATLAS Trigger & Physics week

  14. Trigger Menus Proposal for L=1031 cm-2s-1 Express streams ATLAS Trigger & Physics week

  15. Trigger efficiency from Z → μ+μ- Double Object with orthogonal Signature (DOS) method Double Object (DO) method Backgrounds from BBμμX, Wμv, Zττ Different reconstruction modes 1-2 % statistical uncertainty with few pb-1 data Differential (η,φ) trigger efficiency determination CSC AOD analysis is going to be finalized ATLAS Trigger & Physics week

  16. Muons from p/K

  17. Strategy • extract from minimum bias and dijets of various energy a global pT vs h distribution for pions and kaons, re-weighting to a common value of the integrated luminosity • Use the particle-generator to generate single pions according to the previous distribution • simulate the decay of pions with G4 saving only events were the pion decay before the muon spectrometer • Optimize cuts to identify and reject this kind of muons ATLAS Trigger & Physics week

  18. Event Sample Particle selection requiring: • p PDG code • |h|<2.7 • pT>500MeV • generation at the interaction point (0.,0.,0.) and filling a two-dimensional histogram of pT vs h, one entry for each pion. ATLAS Trigger & Physics week

  19. pT vs h distributions Minimum bias Some existing correlation between pT and h requires a generation according to the 2-D distribution The solution that I adopted is to slice the 2-D histograms in pT bins and simulate using the 1-D projections in pT and h Supposing an efficiency e=10-4 between 2.5 GeV and 7.5 GeV, and a granularity of 500 MeV, to extimate an error of s(e)10% 106 events needed in each bin Dijets J8 The red curve, mu6 eff. at EF, is estimated with 10 pT points (2GeV/c – 8 GeV/c) with 106 – 0.5·106 single muon each but events passing LVL2 are 30 at 3 GeV/c, 500 at 4 GeV/c, 3600 at 5 GeV/c, 350k at 6 GeV/c Single muon efficiency If only ~1% of the pions decays in the volume before the calorimeter at least 109 events should be generated A tool was developed to force all the generated pions to decay: the PionDecayer ATLAS Trigger & Physics week

  20. Produced sample • no available tools to randomly extract from a 2D distribution • solution: slice the 2D distribution in pt bins (of ~same content) and generate according to the 1D distributions of pT and Eta • From PANDA, centrally simulated files: Task name Task IDReq JobsDone JobsTotal events Prio GridStatus Timestamp misal1_mc12.007180.singlePion_pTSlice_20_of_30.digit.v12000502 7822 500 500 25000 100 osg done Apr 18 10:04 misal1_mc12.007162.singlePion_pTSlice_2_of_30.digit.v12000502 6296 1600 1600 80000 100 osg done Mar 1 12:34 misal1_mc12.007163.singlePion_pTSlice_3_of_30.digit.v12000502 6295 1400 1400 70000 100 osg done Mar 1 12:33 ……… misal1_mc12.007189.singlePion_pTSlice_29_of_30.digit.v12000502 6270 100 100 5000 100 osg done Mar 1 11:46 misal1_mc12.007190.singlePion_pTSlice_30_of_30.digit.v12000502 6269 100 100 5000 100 osg done Mar 1 11:45 TOTAL: 25.800 files 1.065.000 events ~1.7Tb Since, for a given pion direction, the decay is forced into a definite path length L, the single event probability is ATLAS Trigger & Physics week

  21. Following steps… • Since full statistics has become available all efforts have been directed to apply the muon slice and the standard ntuple analysis to the single p sample • with some addition specific to the pm case • keep track of the muon mother and its decay vertex • keep track of the links between a combined reconstructed muon and its ID and MS seeds, etc...) • Fixes and migration of methods from MuidMatch to MuidTrack to go in 13.X.X • first attempt: • copy from osg grid to castor, submit jobs to lxplus queues for running the specific reconstruction + analysis code  turned out to be unaffordable mostly due to castor access too slow and unstable • use of grid infrastructures absolutely necessary ! • the solution: use lcg-dq after replicating the files to Napoli tier-2 • affordable but still very time consuming; • copy from castor to NA tier-2 took 4/5 days only for higher pT slices (20-30) • reconstruction jobs submitted on a small part of these replicas • A long process for the study of a critical issue: now all necessary input ready to perform the analysis and get some results ATLAS Trigger & Physics week

  22. Monitoring : Monitoring for validation/DQ assessment in Muon EF DQ workshop : http://indico.cern.ch/conferenceDisplay.py?confId=13869 • Implementation of histogramming code in the HLT common monitoring framework (GenericMonitoringTool) has been completed in release 13 for TrigMoore Hypothesis algos • now under test in Trigger Release Validation • Informations on histograms, algorithms, thresholds provided to configure DQM framework for performing DQ tests/checks of the muon EF histograms (in 12.0.5-HLT) during the last technical run at Point 1 ATLAS Trigger & Physics week

  23. Conclusions • Important steps since last T&P week • Performances under control • Trigger menus for LHC commissioning under study • Still waiting for results on muons from single pion sample • grid tools are fundamental for this study • many technical problems encountered ATLAS Trigger & Physics week

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