High energy photon pairs: RS Graviton study

1

High energy photon pairs:RS Graviton study

Vladimir Litvin, Toyoko OrimotoCaltech, CMS

08 March 2007

2

MC Sample

• MC study to investigate L1 and HLT (in)efficiencies and optimize selection for an express stream for very high energy diphoton events

• ~91k RS-1 G MC events

• Produced at Caltech with CMSSW_1_3_1

• ~46k with m=750GeV & c=0.1

• ~45k with m=1000GeV & c=0.1

• No pileup

• Candidates reconstructed from two Island Basic Clusters from ECAL Barrel/Endcap with pt>100 GeV

3

Invariant Mass: 750 GeV sample

MC Candidates: Reco Candidates:

Mean = 750.0 GeVBW width = 10.6

Mean = 719.6 GeVSigma = 16.3

Pt_photons >100

4

L1 Trigger bits

All events have > 0 L1 trigger bits set

# non-zero L1 bits per event L1 bits set to 1

5

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

6

L1 Trigger bits (cuts)

Events that pass reco cuts (3 mass window + pt_photon1&2 > 100)

7

L1 Trigger bits (cuts + MC Truth)

Events that pass reco cuts + MC Truth match

8

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


HLT Word: 91.0% eff

# non-zero HLT bits per event

HLT bits set

to 1

9

HLT bits (cuts)


10

HLT bits (cuts + MC Truth)


11

S1/S9

Note: this is only for Barrel

Higher energy photon Lower energy photon

Pt_photons > 30Pt_photons > 100

12

S9/S25




13

ECAL Isolation


Energy from basic clusters summed within R cone of 0.3 around basic cluster of photon candidates


14

HCAL Energy Deposit

Energy from HCAL Rechits summed within R cone of 0.3 around basic cluster of photon candidate

HBHE

HO

HF



15

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


16

R < 0.3 0.4 0.5

Pt

> 3

5

1

0Tracker Isolation


Lower energy photon


17

Jets

Pt > 100 0 < Pt < 100

nJets eta phi

18

Jets

pt < 50

Number of jets (passing pt cut) within R=0.3 cone around basic cluster of photon candidate


pt < 100

pt < 50 pt < 100

Lower energy photon


19

More plots

• http://www.hep.caltech.edu/~toyoko/cms/plots/rs1gg/

• Next steps: • Study background samples

• Energy correction

20

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



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

21

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

22

1 TeV Graviton plots

23

Invariant Mass: 1 TeV sample

MC Candidates: Reco Candidates:

Mean = 100.0 GeVBW width = 14.1

Mean = 960.7 GeVSigma = 20.4

Pt_photons >200

24

L1 Trigger bits

All events have > 0 L1 trigger bits set

# non-zero L1 bits per event L1 bits set to 1

25

L1 Egamma Trigger Efficiencies

Bit Nevt Eff Name 5 777 2.0 A_SingleIsoEG56 766 1.9 A_SingleIsoEG107 2050 5.2 A_SingleIsoEG158 16533 41.7 A_SingleIsoEG209 16311 41.1 A_SingleIsoEG2510 797 2.0 A_SingleEG511 797 2.0 A_SingleEG1012 3978 10.0 A_SingleEG1513 39639 99.9 A_SingleEG2014 39638 99.9 A_SingleEG2536 3443 8.7 A_DoubleIsoEG1037 37068 93.4 A_DoubleEG2040 324 0.8 A_Mu7_IsoEG1541 753 1.9 A_Mu7_EG1544 17782 44.8 A_IsoEG10_EG1045 15602 39.3 A_IsoEG15_Jet10046 15730 39.6

A_IsoEG15_TauJet50

Bit Nevt Eff Name 47 39293 99.0 A_EG15_Jet10048 38784 97.7 A_EG15_TauJet5051 16220 40.9 A_IsoEG15_HTT30052 37921 95.6 A_EG15_HTT30056 14368 36.2 A_IsoEG15_ETM3057 32317 81.4 A_EG15_ETM3062 3168 8.0 A_TripleIsoEG563 9752 24.6 A_TripleEG1066 17 0.0 A_DoubleMu7_IsoEG567 32 0.1 A_DoubleMu7_EG568 221 0.6 A_DoubleIsoEG5_Mu769 737 1.9 A_DoubleEG5_Mu771 9222 23.2

A_DoubleIsoEG5_HTT15072 38180 96.2 A_DoubleEG5_HTT15076 8782 22.1

A_DoubleIsoEG5_ETM1577 35603 89.7 A_DoubleEG5_ETM15


EG = egamma, HTT=hadronic total energy, ETT = total transverse energy, ETM=missing transverse energy

26

L1 Trigger bits (cuts)


27

L1 Trigger bits (cuts + MC Truth)


28

HLT Trigger bits

Bit Nevt Eff Name 16 226 0.6 HLT1Electron17 1 0.0 HLT2Electron18 80 0.2 HLT2ElectronRelaxed19 10601 26.7 HLT1Photon20 1393 3.5 HLT2Photon21 21795 54.9 HLT2PhotonRelaxed


HLT Word: 95.2% eff

# non-zero HLT bits per event

HLT bits set

to 1

29

HLT bits (cuts)


30

HLT bits (cuts + MC Truth)


31

S1/S9




32

S9/S25




33

ECAL Isolation


Energy from basic clusters summed within R cone of 0.3 around basic cluster of photon candidates


34

HCAL Energy Deposit

Energy from HCAL Rechits summed within R cone of 0.3 around basic cluster of photon candidate

HBHE

HO

HF



35

R < 0.3 0.4 0.5

Pt

> 3

5

1

0Tracker Isolation




36

R < 0.3 0.4 0.5

Pt

> 3

5

1

0Tracker Isolation


Lower energy photon


37

Jets

Pt > 100 0 < Pt < 100

nJets eta phi

38

Jets

pt < 50

Number of jets (passing pt cut) within R=0.3 cone around basic cluster of photon candidate


pt < 100

pt < 50 pt < 100

Lower energy photon


Documents

High energy photon pairs: RS Graviton study