D. Cavalli, S. Resconi 2 Dec 2008 EtMiss Software updates Jet/EtMiss Meeting D. Cavalli, S. Resconi.

D. Cavalli, S. D. Cavalli, S. ResconiResconi

2 Dec 20082 Dec 2008

EtMiss Software updatesEtMiss Software updates

Jet/EtMiss Meeting

D. Cavalli, S. Resconi

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2 Dec 20082 Dec 2008

In first processing of single beam data (Sept 08) highest level of descoping: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 (Ecell2 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: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

MissingET processing on real data

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2 Dec 20082 Dec 2008

Implement in MET package more basic objects to study performances, Implement in MET package more basic objects to study performances,

and for monitoring / cleaning with first data and for monitoring / cleaning with first data (from the experience with cosmics)(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, this could 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

MissingET in view of first data

cosmics

Ztautau

J4SUMET_BASE_EM:

• good candidate for cleaning cuts

• should be tested in cosmics studies

• can be calculated on AOD/ESD/DPD

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2 Dec 20082 Dec 2008

Implement in MET package the possibility to mask “Bad Channels” in theImplement in MET package the possibility to mask “Bad Channels” in the

calculation of EtMiss 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

MissingET in view of first data

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2 Dec 20082 Dec 2008

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 ESDs

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)

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2 Dec 20082 Dec 2008

• 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

Other deliverables for rel 15

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BACKUP SLIDES

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2 Dec 20082 Dec 2008

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

<> = - 0.7, RMS=3.4

<> = - 2.5, RMS=6.8

<> = 0.3, RMS=3.5

<> = 0.4, 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

ExMiss EyMiss EyMiss_HEC

<> = - 0.5, RMS=2.4

<> = - 1.8, RMS= 4

No masking of bad cells applied

will be provided at Calo level ?

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2 Dec 20082 Dec 2008

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

EM fraction of SUMET_Base

cosmics:

data08_cosmag.00092099.physics_L1Calo

Ztautau sample:

trig1_misal1_csc11.005188.A3_Ztautau_filter

J4 sample:

trig1_misal1_csc11.005013.J4_pythia_jetjet

SUMET_BASE_EM is a good candidate for Cleaning cuts

Can be tested in cosmics studies.

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2 Dec 20082 Dec 2008

re-calculate / re-calibrate changing 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

MissingET reconstruction on AODs

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2 Dec 20082 Dec 2008

Merging with ObjMissingET (in progress):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

Merging with ObjMET

D. Cavalli, S. Resconi 2 Dec 2008 EtMiss Software updates Jet/EtMiss Meeting D. Cavalli, S. Resconi.

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