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FCCanalysis*lowZ’->llexampleClementHelsens
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Outline
• Delphescardsproposal• FCCSWanalysisflow• Z’->llfullexample
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Delphescardproposal• AsdonefortheATLASupgrade:• comparethenominalFCCDelphesparametrisa7onwitha“beOer”and“worse”detector
• Thiswillbeveryinforma7veintermsofphysicsreach• differentvaria7onsbracketsthenominal
• WewillalsopresentresultsusingtheCMSparametrisa7on
• Thosevaria7ons(includingCMS)• willbecentrallysupported• thisdoesnotpreventuserstostudymoreconfigura7onsiftheywantto,forexampleifonlyaspecificaspectofthedetectorisrelevantforananalysis
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Trackangularresolution• InDelphesthetrackangularresolu7onisconsideredasperfect• Thisisawrongassump7onandithasbeenimplementedinanewDelphesrelease(notyetpropagatedinFCCSW)
• CMSvalueisconsistentwithσθ~0.003
• Proposetochoose0.003oreven0.002asaconserva7vebaseline
• Backoftheenvelopcalcula7onwithtrackerexperts• ifweconsideratrackasmergedifthe1stpixellayerisshared,leadtoaσθ~0.004-0.006
• shouldbeabletodis7nguish2overlappingtrackseveniftheysharethefirst1-2-3pixellayers?
• Proposednumberdoesnotlookcompletelycrazy
• Ofcourseafullsimula7onoftheFCCtrackertostudythistrackresolu7onwouldbemorethanwelcometovalidatethechoice!
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Trackangularresolution
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Proposedvariations• Allresolu7ons:x2,nominal,x0.5• Tracking/ECAL/HCALgranulari7es:x2,nominal,x0.5
• Chargedhadronefficiency:90,95,99%• Muonefficiency95,99,100%• Electronefficiency90,95,99%• Photonefficiency85,95,100%
• B-tagefficiency(constantfake-rate):75,85,95%• C-tagefficiency(constantfake-rate):35,45,55%
• Akerdiscussingwithcalorimeterscolleagues,wemightadd2morevaria7onskeepingthegranularityasnominalandvarytheresolu7ons
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FCCSWanalysis*low1. Generateevents:• ForthemomentfromMG5gridpackstoproduceLHEfiles
2. SimulateeventswithFCCSW+Delphes• DirectlyfromPythia8• FromtheLHE• FromHEPMC(previoustalk)
3. Createflatntupleswithheppy• Usingtheeventssimulatedin2.
4. Analyzetheflattree• Usingeventscreatedin3.• Createhistograms,plots
5. Limitssignificance• Usinghistogramscreatedin4.
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Fullyintegratedtotheproduc7onsystem,linksbetween
Getthecrosssec7ons
CreatesadatabaseofLHEeventsavailable
CreatesadatabaseofFCCEDMeventsavailable
Usetheeventsinthedatabasetoproduceanalysestemplates
Usetheeventsproducedinheppytocreatestackedplots
1.Generation• Alreadyexplainedalotinthepast• StartfromMadgrapgridpacks• CreateLHEfiles• Listofavailablesamplesandsta7s7csisavailablehere:hOp://fcc-physics-events.web.cern.ch/fcc-physics-events/LHEevents.php
• MostoftheprocessesarebinnedinHT
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hOps://github.com/clementhelsens/EventProducer/tree/master
2.Simulation(FCCSWDelphes)• FromtheLHEfiles,createFCCEDMfileswithagivenDelphesparametrisa7on
• RecentlyaddedthepossibilitytodirectlysimulateeventswithPythia8• Usefulforbunchofsignals
• Availablesamples:• ForFCC_v01(nominalhOp://fcc-physics-events.web.cern.ch/fcc-physics-events/Delphesevents_fcc_v01.php
• ForCMShOp://fcc-physics-events.web.cern.ch/fcc-physics-events/Delphesevents_cms.php
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hOps://github.com/clementhelsens/EventProducer/tree/master
3.Flattrees(heppy)
• Withinheppycreateananalysisdirectorythatcontainsalwaysthesamefiles:• Analysis.py->todefinethelistofmodulestoberunandthelistofsamplesoverwhichtoruntheinputsfilelistsandcrosssec7onsetc…iscentrallydefinedandsupported(fromstep2.)
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hOps://github.com/HEP-FCC/heppyhOps://github.com/clementhelsens/FCChhAnalyses/
3.Flattrees(heppy)
• Withinheppycreateananalysisdirectorythatcontainsalwaysthesamefiles:• Analysis.py->todefinethelistofmodulestoberunandthelistofsamplesoverwhichtorun
• Selec7on.py->todefinethelistofpre-selec7ons 18/07/17
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hOps://github.com/HEP-FCC/heppyhOps://github.com/clementhelsens/FCChhAnalyses/
3.Flattrees(heppy)
• Withinheppycreateananalysisdirectorythatcontainsalwaysthesamefiles:• Analysis.py->todefinethelistofmodulestoberunandthelistofsamplesoverwhichtorun
• Selec7on.py->todefinethelistofpre-selec7ons• TreeProducer.py->Todefinethevariablestobestoredintheoutputfile
• TheideaistohaveallFCChhanalysesdefinedinthisformsothattheanalysisflowarefullyreproducible,needtheoutputstobestoredontheeos/experiments/fcc/hh/analyses/
• Listofanalysiswehavesofar
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hOps://github.com/HEP-FCC/heppyhOps://github.com/clementhelsens/FCChhAnalyses/
4.FlatTreeanalyser• Fromthefilesproducedin3.producestackplotsandhistogramsforfinalanalysisfordifferentselec7ons
• Selec7onbasedonvariablesavailableintheflatTree
• Proposalisalsotokeeptheanalysistemplatessothatwecanreproducetheresults
• Listofanalysessofar:
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hOps://github.com/selvaggi/FlatTreeAnalyzer
5.Limit,Signi*icance• BasedonatoolheavilyusedinATLAS• ROOSTATprofilelikelihoodra7o• Asympto7climits• Couldaddanykindofuncertain7es(shapeornormaliza7ons)• Combinechannelsandcorrelatenuisanceparameters• Fullploqngavailabletoproduce:• Post-fitplots• Rankingplots• Correla7onmatrix• Pruningofsystema7cs
• Otherhigherlevelmacrosto:• Produceconfidencelevelexclusionplotsversusmass• Scantheluminositytogetdiscoverypoten7al
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hOps://github.com/clementhelsens/FCCFiOer
Z’->ll• Followingthepreviousdiscussions• Re-didthediscoverypoten7alofZ’->ll• UsingFCC(nominalonly)andCMSparametrisa7ons
• Selec7on• 2sameflavorlepton,pT>200GeV,Mll>2TeV• UsefullMllshapeasdiscriminant• Asympto7climits• 50%uncertaintyonDrell-Yann• 30ab-1luminosityforexclusionplots
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FCC
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CMS
Limits
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SimilarreachforelectronsFormuonsofcoursethingsaredifferent…Expecta7on45(42)TeVforFCC(CMS)
Signi*icance
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With30ab-1candiscoverupto:43TeVforFCC40TeVforCMS
Z’->ee Z’->μμ
Z’->ll
Summary• Delphes• cardvaria7onsproposedtohavepossiblyresultsthat“brakets”thenominaldetectorparametrisa7on
• AlsosupportCMScard
• FCCSW• Newanalysisflowdefinedandfullyopera7onal• Makeitasefficientaspossible• Trytobeasreproducibleaspossible
• Z’->ll• analysiswithinFCCSWframeworkbeingfinalized• documenta7oninprepara7ontogetherwithotherheavyresonances
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