Muon Trigger Slice Report Sergio Grancagnolo for the Muon Trigger group INFN-University of Lecce CERN Jan 23, 2007

23 Jan 2007Sergio Grancagnolo2 Muon Trigger Slice  Fast  Isol  Comb ~2 kHz 10 ms time TrigMoore MOORE ~ 200 Hz 1 s time LVL1 Simulation LVL2 Selection EF Selection 2.5  s fixed latency time MuId SA MuId COMB B Physics processor DAQ RPC MuCTPI TGC CTP LVL2: muon RoIs DAQ: muon candidates DAQ: muon candidates DAQ 75 KHz ~23 KHz

23 Jan 2007Sergio Grancagnolo3 Samples and Releases CSC production with Athena and previous DetDescrVersion = CSC-01-XX-YY Reconstruction with Athena Results presented are not complete, other validations are on going as more data will be available. More details on what will be shown here can also be found in “TAPM” and “T&P week” meetings.

23 Jan 2007Sergio Grancagnolo4 HLT software status in Sequence for a  X signature: –muFast (LVL2 - Muon Spectrometer only) + muFastHypo (test p T >X ) –IDSCAN (LVL2 - Inner Detector only) –muComb (LVL2 - MS &ID) + muCombHypo (p T test) –Muon reconstruction EF ID –TrigMoore (EF) MS reconstruction Extrapolation to IP Combined fit with ID tracks (reconstructed with newTracking) –TrigMooreHypo (test p T of combined muons) Signatures: –mu6l, mu6, mu20i for HLTCONFIGVERSION=CSC-02 –mu0, mu5, mu20i for HLTCONFIGVERSION=CSC GeV Vertical slice configured for trigger menus at 900GeV in addition to standard configuration –No implementation of the isolation cuts yet

23 Jan 2007Sergio Grancagnolo5 AODs Output of trigger objects in AOD to allow rerunning of hypothesis algorithms Trigger AOD contents LVL1LVL2EF RecMuonRoIMuonFeatureTrigMuonEF CombinedMuonFeature

23 Jan 2007Sergio Grancagnolo6 LVL1

23 Jan 2007Sergio Grancagnolo7 LVL1 Barrel Muon Trigger Rates Rates as shown in last T&P week Muon sources 6 GeV 6 GeV threshold Lumi= GeV 5 GeV threshold Lumi=10 33 Cosmic Cosmic threshold Lumi=10 33  /K Hz21800 Hz62500 Hz b 1640 Hz2220 Hz3360 Hz c 970 Hz1400 Hz2400 Hz W 3 Hz t Negligible Sum 13.5 kHz25.5 kHz68.3 kHz Level-1 Efficiency Inclusive μ LHC (prompt μ and  /K decay)

23 Jan 2007Sergio Grancagnolo8 There is inconsistency between TGC cabling database in release and < <5% efficiency loss with older release for high pT muon(20GeV) <5% efficiency loss with older release for high pT muon(20GeV) with eta~1.2 and FWD region (small effect for low pT muon) with eta~1.2 and FWD region (small effect for low pT muon) LVL1 Muon Endcap Simulation: Current Status The latest version : TrigT1TGC (collected in ) [1]Use RDO generated by release x Execute TrigT1TGC with release since coincidence window is not optimal [2]Use RDO generated by release < MuonRdoToMuonDigit.ApplyPatchForTGC = True Patch will be introduced in release 13 so that user can use RDO (not necessary to start from HIT). To get the latest LVL1 endcap muon trigger performance to get correct IDs.

23 Jan 2007Sergio Grancagnolo9 Overlap resolution in the MuCTPI MuCTPI simulation is able to handle all kinds of overlaps in release MuCTPI simulation is able to handle all kinds of overlaps in release The plots demonstrate the MuCTPI’s current efficiency to resolve fake double-counts between muon sectors. (Best and worst cases shown.)The plots demonstrate the MuCTPI’s current efficiency to resolve fake double-counts between muon sectors. (Best and worst cases shown.) The Barrel-Endcap overlaps can be handled pretty well, while the Endcap-Endcap overlaps show problems at low p T.The Barrel-Endcap overlaps can be handled pretty well, while the Endcap-Endcap overlaps show problems at low p T. before MuCTPI after MuCTPI

23 Jan 2007Sergio Grancagnolo10 Expected fake double-count rates Overlap type w/o overlap removal in MuCTPI with overlap removal in MuCTPI Barrel-Barrel169 Hz81 Hz Barrel-Endcap174 Hz8 Hz Endcap-Endcap486 Hz*315 Hz* Forward-Forward43 Hz*28 Hz* Total872 Hz432 Hz * Not using strip masks on sector edges. Rates of fake 6 GeV di-muon triggers at L=10 33 cm -1 s -2

23 Jan 2007Sergio Grancagnolo11 Other LVL1 on-going work Implementation of configurations mechanism for non-standard trigger (cosmics, 5GeV threshold)

23 Jan 2007Sergio Grancagnolo12 LVL2

23 Jan 2007Sergio Grancagnolo13  Fast: endcaps Barrel LUT vs r Endcap LUT vs  Track finding efficiency w.r.t. LVL1 ~ 99.5%~ 100% algo time on 2.4 GHz ~ 1.5 ms< 1 ms Tail extension over 2  6 GeV 20 GeV 6 GeV 20 GeV Resolution 6 GeV 20 GeV 6 GeV 20 GeV fit of the resolution core 1.5  fit first release where the algorithm for endcaps runs in the slice

23 Jan 2007Sergio Grancagnolo14 Offline Emulation Inner station has less coverage than medium-outer stations. To check impact on acceptance of a three point measurements vs two point measurements, an offline emulation of the LVL2  Fast has been implemented in the endcaps, using also the inner station measurement. Resolutions function of eta,phi (local). Pt=-6 GeV Preliminary Offline studies Results agree with online code. Loss in acceptance only in some marginal regions. Including inner station, resolution improves (<10%) in most regions except some eta, phi regions

23 Jan 2007Sergio Grancagnolo15 Without TRT BARREL: Algorithm for the barrel finalized for Matching with the ID track done at the external surface of the CALO –  match,  match & z match all studied with respect the muon p T –matching efficiency 99.2% with 3  performance checked with a new single muon production (11.0.6) used ~ 1.5x10 6 events produced with the spread of the interaction point cut on the matching window optimized for muon tracks with p T of 6 GeV  Comb: physics performance Barrel Endcap: as of now no back extrapolation is available, hence the association between ID and muon track is driven only by the p T estimated in the two subdetectors

23 Jan 2007Sergio Grancagnolo16 Performances with misaligned data check of performances while LUTs and alignement of geometry are not optimal use of the available sample at 5,10,50,100,300 GeV –misaligned geometry: ATLAS-CSC performance of  Fast is lowered but  Comb almost recover it –no TRT propagation of IDSCAN always used

23 Jan 2007Sergio Grancagnolo17 LVL2 on-going work Work in progress (ready for ): deploying the pattern recognition in the innermost endcap refining p T estimation with the use of innermost station back extrapolation for the combined reconstruction in the endcap correcting the LVL2 geometry model with the alignment accessing the MDT configuration database online access of the MDT calibration constants

23 Jan 2007Sergio Grancagnolo18 Event Filter

23 Jan 2007Sergio Grancagnolo19 EF Performances p T rec / p T gen MOORE tracks with  2 <3 3.65% 3.70% 2.75% Release p T = 50 GeV 10k single muon events MuidSA tracks successfully fitted MuidCB tracks successfully fitted No bias observedwithin statistical errors Results agree with expected performances from offline algorithms

23 Jan 2007Sergio Grancagnolo20 p T rec / p T gen - SIGMA Blue = MOORE Red = MuidSA Pink= MuidCB  Expected trend of p T resolution vs eta. Increasing at critical barrel-endcap transition, as observed in offline reconstruction. Resolutions Release Release

23 Jan 2007Sergio Grancagnolo21 Algorithm Efficiencies p T =100 GeV Efficiency drop in correspondance of the feets

23 Jan 2007Sergio Grancagnolo22 EF plans for ID seeded version Package split in order to be more friendly to new developers Topological algorithms Migration to new EDM –Implementation of Alg tools in order to share code with offline –Will get collections of unseeded (for wrapped mode) or of seeded (for online use) PrepRawData

23 Jan 2007Sergio Grancagnolo23 Conclusions Muon slice is performing well All levels are ready, isolation requirement using calorimeter, still to be integrated Next improvements –Configurables drive with configurables the configuration of the full set of Tools/Services used by algorithms, where possible –Migration to "New Steering" FEX algorithm migrated for LVL2 and EF Hypothesis algorithm coding on going for EF, done for LVL2 need extensive testing –New performances need to be evaluated as new data will be available, compatibly with csc notes timescale