1 High energy photon pairs: RS-1 Graviton study Vladimir Litvin, Toyoko Orimoto Caltech, CMS
Jan 15, 2016
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High energy photon pairs:RS-1 Graviton study
Vladimir Litvin, Toyoko Orimoto
Caltech, CMS
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MC Sample
• MC study to investigate L1 and HLT (in)efficiencies and optimize selection for an express stream for very high energy diphoton events
• ~46k RS-1 G MC events
• Produced at Caltech with CMSSW_1_3_1
• m=750GeV & c=0.1
• No pileup
• Candidates reconstructed from two Island Basic Clusters from ECAL Barrel/Endcap with pt>100GeV
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Invariant Mass: 750 GeV sample
MC Candidates: Reco Candidates:
Mean = 750.0 GeVBW width = 10.6
Mean = 719.6 GeVSigma = 16.3
pt_photon1>100 && pt_photon2>100
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Invariant Mass: 1 TeV sample
MC Candidates: Reco Candidates:
Mean = 100.0 GeVBW width = 14.1
Mean = 960.7 GeVSigma = 20.4
pt_photon1>100 && pt_photon2>100
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L1 Trigger bits
All events have > 0 L1 trigger bits set
# non-zero L1 bits per event L1 bits set to 1
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L1 Egamma Trigger Efficiencies
Bit Nevt Eff Name 5 767 2.0 A_SingleIsoEG56 760 2.0 A_SingleIsoEG107 2474 6.4 A_SingleIsoEG158 21335 55.1 A_SingleIsoEG209 21137 54.5 A_SingleIsoEG2510 786 2.0 A_SingleEG511 788 2.0 A_SingleEG1012 3909 10.1 A_SingleEG1513 38693 99.9 A_SingleEG2014 38689 99.8 A_SingleEG2536 5257 13.6 A_DoubleIsoEG1037 36314 93.7 A_DoubleEG2040 325 0.8 A_Mu7_IsoEG1541 600 1.5 A_Mu7_EG1544 22034 56.9 A_IsoEG10_EG1045 19234 49.6 A_IsoEG15_Jet10046 20144 52.0
A_IsoEG15_TauJet50
Bit Nevt Eff Name 47 38107 98.3 A_EG15_Jet10048 38021 98.1 A_EG15_TauJet5051 19945 51.5 A_IsoEG15_HTT30052 35566 91.8 A_EG15_HTT30056 17452 45.0 A_IsoEG15_ETM3057 30955 79.9 A_EG15_ETM3062 3903 10.1 A_TripleIsoEG563 9063 23.4 A_TripleEG1066 14 0.0 A_DoubleMu7_IsoEG567 19 0.0 A_DoubleMu7_EG568 211 0.5 A_DoubleIsoEG5_Mu769 589 1.5 A_DoubleEG5_Mu771 11286 29.1
A_DoubleIsoEG5_HTT15072 37335 96.4 A_DoubleEG5_HTT15076 10556 27.2
A_DoubleIsoEG5_ETM1577 34677 89.5 A_DoubleEG5_ETM15
From 38748 total events
EG = egamma, HTT=hadronic total energy, ETT = total transverse energy, ETM=missing transverse energy
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L1 Trigger bits (cuts)
Events that pass reco cuts (3 mass window + pt_photon1&2 > 100)
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L1 Trigger bits (cuts + MC Truth)
Events that pass reco cuts + MC Truth match
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HLT Trigger bits
Bit Nevt Eff Name 16 312 0.8 HLT1Electron17 7 0.0 HLT2Electron18 89 0.2
HLT2ElectronRelaxed19 15470 39.9 HLT1Photon20 2810 7.3 HLT2Photon21 24490 63.2 HLT2PhotonRelaxed
From 38748 total events
HLT Word: 91.0% eff
# non-zero HLT bits per event
HLT bits set
to 1
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HLT bits (cuts)
Events that pass reco cuts (3 mass window + pt_photon1&2 > 100)
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HLT bits (cuts + MC Truth)
Events that pass reco cuts + MC Truth match
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S1/S9
Note: this is only for Barrel
Higher energy photon Lower energy photon
Pt_photons > 30Pt_photons > 100
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S9/S25
Note: this is only for Barrel
Higher energy photon Lower energy photon
Pt_photons > 30Pt_photons > 100
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ECAL Isolation
Higher energy photon Lower energy photon
Energy from basic clusters summed within R cone of 0.3 around basic cluster of photon candidate
Pt_photons > 30Pt_photons > 100
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HCAL Energy Deposit
Energy from HCAL Rechits summed within R cone of 0.3 around basic cluster of photon candidate
HBHE
HO
HF
Higher energy photon Lower energy photon
Pt_photons > 30Pt_photons > 100
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R < 0.3 0.4 0.5
Pt
> 3
5
1
0Tracker Isolation
Number of tracks (passing pt cut) within R cone around basic cluster of photon candidate
Higher energy photon
Pt_photons > 30Pt_photons > 100
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R < 0.3 0.4 0.5
Pt
> 3
5
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0Tracker Isolation
Number of tracks (passing pt cut) within R cone around basic cluster of photon candidate
Lower energy photon
Pt_photons > 30Pt_photons > 100
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Jets
Pt > 100 0 < Pt < 100
nJets eta phi
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Jets
pt < 50
Number of jets (passing pt cut) within R=0.3 cone around basic cluster of photon candidate
Higher energy photon
pt < 100
pt < 50 pt < 100
Lower energy photon
Pt_photons > 30Pt_photons > 100
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More plots
• http://www.hep.caltech.edu/~toyoko/cms/plots/rs1gg/
• Next steps: • Study background samples
• Energy correction
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L1 Trigger bits
0 A_SingleMu3
1 A_SingleMu10
2 A_SingleMu14
3 A_SingleMu20
4 A_SingleMu25
5 A_SingleIsoEG5
6 A_SingleIsoEG10
7 A_SingleIsoEG15
8 A_SingleIsoEG20
9 A_SingleIsoEG25
10 A_SingleEG5
11 A_SingleEG10
12 A_SingleEG15
13 A_SingleEG20
14 A_SingleEG25
15 A_SingleJet20
16 A_SingleJet60
17 A_SingleJet100
18 A_SingleJet140
19 A_SingleJet180
20 A_SingleTauJet20
21 A_SingleTauJet60
22 A_SingleTauJet100
23 A_SingleTauJet140
24 A_SingleTauJet180
25 A_HTT100
26 A_HTT200
27 A_HTT300
28 A_HTT400
29 A_HTT500
30 A_ETM20
31 A_ETM40
32 A_ETM60
33 A_ETM80
34 A_ETM100
35 A_DoubleMu7
36 A_DoubleIsoEG10
37 A_DoubleEG20
38 A_DoubleJet100
39 A_DoubleTauJet50
40 A_Mu7_IsoEG15
62 A_TripleIsoEG5
63 A_TripleEG10
64 A_TripleJet70
65 A_TripleTauJet50
66 A_DoubleMu7_IsoEG5
67 A_DoubleMu7_EG5
68 A_DoubleIsoEG5_Mu7
69 A_DoubleEG5_Mu7
70 A_DoubleMu7_HTT150
71 A_DoubleIsoEG5_HTT150
72 A_DoubleEG5_HTT150
73 A_DoubleJet50_HTT150
74 A_DoubleTauJet50_HTT150
75 A_DoubleMu7_ETM15
76 A_DoubleIsoEG5_ETM15
77 A_DoubleEG5_ETM15
78 A_DoubleJet50_ETM15
79 A_DoubleTauJet50_ETM15
80 A_QuadJet50
81 A_MinBias_HTT10
82 A_ZeroBias
41 A_Mu7_EG15
42 A_Mu7_Jet100
43 A_Mu7_TauJet50
44 A_IsoEG10_EG10
45 A_IsoEG15_Jet100
46 A_IsoEG15_TauJet50
47 A_EG15_Jet100
48 A_EG15_TauJet50
49 A_Jet100_TauJet50
50 A_Mu7_HTT300
51 A_IsoEG15_HTT300
52 A_EG15_HTT300
53 A_Jet100_HTT300
54 A_TauJet50_HTT300
55 A_Mu7_ETM30
56 A_IsoEG15_ETM30
57 A_EG15_ETM30
58 A_Jet100_ETM40
59 A_TauJet50_ETM40
60 A_HTT200_ETM40
61 A_TripleMu7
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HLT Trigger bits
0 HLT1jet
1 HLT2jet
2 HLT3jet
3 HLT4jet
4 HLT1MET
5 HLT2jetAco
6 HLT1jet1METAco
7 HLT1jet1MET
8 HLT2jet1MET
9 HLT3jet1MET
10 HLT4jet1MET
11 HLT2jetvbfMET
12 HLT1MET1HT
13 HLT1jetPE1
14 HLT1jetPE3
15 HLT1jetPE5
16 HLT1Electron
17 HLT2Electron
18 HLT2ElectronRelaxed
19 HLT1Photon
20 HLT2Photon
21 HLT2PhotonRelaxed
22 HLT1MuonIso
23 HLT1MuonNonIso
24 HLT2MuonIso
25 HLT2MuonNonIso
26 HLT2MuonJPsi
27 HLT2MuonUpsilon
28 HLT2MuonZ
29 HLTNMuonNonIso
30 HLT1MuonStartup
31 HLTB1Jet
32 HLTB2Jet
33 HLTB3Jet
34 HLTB4Jet
35 HLTB1JetMu
36 HLTB2JetMu
37 HLTB3JetMu
38 HLTB4JetMu
39 HLT1Tau
40 HLT2Tau
41 HLTPixelTau
42 HLTXElectronBJet
43 HLTXMuonBJet
44 HLTXMuonBJetSoftMuon
45 HLTZeroBias
46 HLTMinBias
47 HLTMinBiasPixel