EtMiss Software updates

1. EtMiss Software updates Jet/EtMiss Meeting D. Cavalli, S. Resconi

2. MissingET processing on real data  In first processing of single beam data (Sept 08) highest level of descoping:  Only METAlg with a minimal set of MET Tools to calculate: MET_Base = EtMiss from all CaloCells (Ecell2 noise)  etx(), ety(), sumet(),  exCalo(CaloReg), eyCalo(CaloReg), etSumCalo(CaloReg),ncellCalo(CaloReg) CaloReg = PEMB, EMB, PEMEC, EME, TILE, HEC, FCAL  exReg(EtaReg), etReg(EtaReg), etSumReg(EtaReg) EtaReg = Central (||1.5), EndCap (1.5||  3.2), Forward (3.2||5)  Since rel 14.2.23.2 added quantity for basic performance/noise studies with first data: MET_Base0 = EtMiss from all CaloCells WITHOUT any noise cuts  Available in “data08_cosmag*recon*f75*”  In next reprocessing (rel 14.5.0) no need to descope MET:  All combined reco algo will run, all needed input objects to MET will be available  Only one problem with input muon containers not available, should be fixed by muon experts

3. MissingET in view of first data  Implement in MET package more basic objects to study performances, and for monitoring / cleaning with first data (from the experience with cosmics)  MET reconstruction from Calo / TopoTowers:  simple implementation: add a new tool that loops on Towers and calculate MET • MET in calo samplings and eta/phi slices:  Could be implemented directly in MET  P. Loch proposal: implement a cell map in a package related to event quantities, thiscould be a common tool for MET, for monitoring, etc (Adam volunteered to work on that…)  Already available: SUMET_BSE_EM= SumET in EM calos / SumET_Base SUMET_BASE_EM: • good candidate for cleaning cuts • should be tested in cosmics studies • can be calculated on AOD/ESD/DPD J4 Ztautau cosmics

4. MissingET in view of first data  Implement in MET package the possibility to mask “Bad Channels” in the calculation of EtMiss • Problematic channels should be treated as much as possible at calorimeter level to guarantee a consistent treatment in all combined reconstruction algorithms • MET will use the official treatment / tools provided by calorimeters experts • Different tools are available : LArBadChannelTool, TileBadChannelTool, CaloBadChannelTool (combined info for LAr + Tile) • In contact with LAr+Tile experts to understand which tools to use and how to proceed  Work in progress in the context of the Jet/EtMiss Data Preparation Task Force

5. MissingET re-reconstruction on ESDs  Some improvements related to input muon containers: • Since rel 14.4.0 MET uses muon containers available both in ESD and AOD: “StacoMuonCollection”, “CaloMuonCollection” • For what concern TopoCluster input containers: • No more need to re-reconstruct TopoClusters on the fly to get “CaloTopoCluster” container used to calculate MET from uncalibrated TC • Possibility to switch to the uncalibrated signal state of the TopoClusters  to be implemented in MET MissingET re-reconstruction on AODs • On AOD: NOT possible to re-calculate EtMiss at Cell level. Overlap removal among reco objects cannot be done at CaloCell level: • Ambiguity resolution could be based on Topoclusters BUT: •electrons/photons and muons are NOT built on TopoClusters •in AOD we have all CaloCells for electons/photons/muons • The idea is to measure common cell content between different kind of clusters: • Calculate the likelihood that a cell is within a TopoCluster envelop around its barycenter  fraction of Ncells/energy from ele in Topocluster • Code is existing but still under test/optimization • Could be a common tool for overlap removal at AOD level (discussion at the last PAT)

6. Other deliverables for rel 15 • Towards the best Refined Calibration:  METRefEleTool: test of CalibHits based electron calib (No out-of-cone corr) in progress now  METRefJetTool:apply scale factor (apart out-of-cone corr)need to have separate corrections due to different effects / use correction factor from track jets to recover energy losses  METRefMuonTool: plan to move to use TrackInCaloTools instead of TrackToCalo • • Muon term: •  bug fix affecting calculation of muon term for isolated muos in tag MissingET-03-01-25 •  check/improve cleaning cuts  it would be usefull to have a common tool provided by muon experts (started discussion with Ketevi) • • Merging with ObjMissingET:  Include calibration of cells outside reconstructed objects provided by ObjMET:still to finalize the integration in MissingET package (Xin Chen) ….also move MissingETSignificance to use MET objects (Xin Chen) • • METPerformance package (proposal by Adam Y.):official package to provide tools for measuring the MET algorithm performance •  see talk by Adam Y. tomorrow at the Jet/EtMiss Data Preparation task force

7. BACKUP SLIDES

8. MET_Base0 MET_Base0 and MET_Base distribution on RNDM trigger:data08_cosmag.00092100.physics_RNDM.recon.ESD.o4_f75_T1224790081 MET_Base, MET_Base0 ExMiss EyMiss_HEC EyMiss <> = - 0.5, RMS=2.4 <> = - 1.8, RMS= 4 <> = 0.3, RMS=3.5 <> = 0.4, RMS=6.8 <> = - 0.7, RMS=3.4 <> = - 2.5, RMS=6.8 EyMiss distribution not centered on 0: EyMiss_Base0 more evident behaviour  Due to HEC problems ? MET_Base0 can be useful to study noise and to identify calo problems No masking of bad cells applied will be provided at Calo level ?

9. cosmics: data08_cosmag.00092099.physics_L1Calo Ztautau sample: trig1_misal1_csc11.005188.A3_Ztautau_filter J4 sample: trig1_misal1_csc11.005013.J4_pythia_jetjet EM fraction of SUMET_Base EM fraction of SumET =SumET in EM calos / SumET_Base SUMET_BASE_EM =(SumET_EMB+ SumET_PEMB+SumET_EMEC+ SumET_PEMEC) / SumET_Base  those info are already available in ESD / AOD / CBNT SUMET_BASE_EM is a good candidate for Cleaning cuts Can be tested in cosmics studies.

10. MissingET reconstruction on AODs re-calculate / re-calibratechanging calibration and/or particle-Identification • On AOD: NOT possible to re-calculate EtMiss at Cell level. Overlap removal among reco objects cannot be done at CaloCell level. How to implement ambiguity resolution at AOD level ? • see talk by Peter L. at Tucson ATLAS Hadronic Calibration Workshop, March 08: Ambiguity resolution could be based on Topoclusters BUT:  electrons/photons and muons are NOT built on TopoClusters  no direct association between muons and TopoClusters The idea is to measure common cell content between different kind of clusters:  in AOD we have all CaloCells for electons/photons/muons  AOD TopoCluster have no cells, so a criteria has to be applied: Calculate the likelihood that a cell is within a TopoCluster envelop around its barycenter Code is existing but still under test/optimization:  re-used the same MET Tools written for ESD  same map as ESD Cell map can be used for clusters

11. Merging with ObjMET Merging with ObjMissingET (in progress):  Calibration of cells outside reconstructed objects: Cells in TopoClusters outside reconstructed objects are taken into account in the EtMiss calculation (MET_CellOut) special calibration for low pT depositions provided by ObjMET: in MissingETTools package: MiniJetTool and PionWeightTool integration in MissingET package, in METRefinedClusterOut : build the MiniJet Collection using MiniJetTool  call get_weight(*Cell, *TopoClus) method provided by PionWeightTool:  if the TopoClus belongs to a MiniJet returns a Cell weight that depends to the /classification of the MiniJet  if the TopoClus does not belong to a MiniJet returns a Cell weight that depends on the CaloRegion of the TopoClus (Barrel, Endcap, FCal) output object key= MET_CellOutMiniJet still to finalize testing before putting in CVS  in contact with Xin Chen