This document outlines José Cupertino Ruiz Vargas's PhD thesis on searching for diboson resonances in CMS data. It begins with an introduction to the standard model of particle physics and motivations for physics beyond the standard model, including the Randall-Sundrum model with extra dimensions. It then describes the CMS detector and object identification techniques. The analysis strategy is to select events with two opposite-sign leptons and two jets, and estimate backgrounds using Monte Carlo simulations and data-driven techniques. Unblinded results show agreement between data and background predictions in control regions.

1. Search for Diboson
Resonances in CMS
JOSÉ CUPERTINO RUIZ VARGAS
SPRACE - UNESP

2. 2
PhD Thesis
Presented to fulfill the requirements
for the degree of Doctor of Philosophy
in Physics.
São Paulo, 22 May 2017
SÃO PAULO RESEARCH AND ANALYSIS CENTER 222 May 2017

3. Outline
Search for Diboson Resonances
q General Strategy
q Event Selection
Analysis of CMS Data
q Background Estimation
q Confidence Limits
Conclusions and Outlook
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 3
Introduction
q The Standard Model and Beyond
q The Randall-Sundrum Model
The LHC and the CMS experiment
q Detector Components
q Identification of Physical Objects

4. Introduction
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 4

5. The Standard Model (1)
Particle Content
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 5

6. The Standard Model (2)
Interactions
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 6

7. Standard Model (3)
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 7
Predicts
q Weak interaction via
neutral current.
q The mass of the vector
bosons (W and Z).
q The existence of gluons
and three jets events.
q The evolution of the
coupling constant.
q The existence of the
Higgs boson.
Improvements
q Reproduces the low energy
phenomenology.
q The amplitudes respect
unitarity bounds.
q GIM mechanism requires
family structure.
q CP violation described by the
CKM matrix.
q Formulation of a gauge
theory for strong
interactions (QCD).
Success
q Existence of W, Z and gluons
was confirmed.
q The existence of three
families was established.
q CP violation found in the
third generation.
q There is no evidence of
fermionic structure.
q Discovery of the
Higgs boson.

8. Higgs Boson Discovery at CERN (2012)
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 8

9. Standard Model Success
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 9
Parameters theory
vs measurement
Dependence with other
particles mass
Higgs boson couplings with
fermions and vector bosons

10. Unanswered Questions of the SM
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 10
Motivations for Physics Beyond the SM
q Gravity + SM unification
q Hierarchy of Gravity and Weak scale
q Fine-tuning of the Higgs mass
H H H H H H
HW f
H H H H
W H
Λ = 5 TeV

11. Extra Dimensions and Randall-Sundrum Model
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 11
Randall-Sundrum Model
q 5-dimensional bulk
q 4-dimensional branes
q Warped ED compactified in
𝑆" 𝑍$⁄ orbifold
Exponential hierarchy
q Solves hierarchy problem
𝑀'(
$
=
𝑀∗
+
𝑘
(1 − 𝑒1$234)
Kaluza-Klein idea (1920’s)
q Gravity and EM unified
via 5-dimensional gravity
q Kaluza-Klein modes
𝑚$
= 𝑚7
$
+ 9
𝑛;
$
𝑅;
$
=
;>"
q Extra dimensions
𝑅; (𝑖 = 1, … , 𝛿)

12. EXO
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 12

13. B2G
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 13
Diboson
Resonances

14. The LHC and the
CMS experiment
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 14

15. The LHC
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 15
Circular accelerator
q Circumference of 27 km
q Proton-Proton collisions
q Heavy ions collisions
Center-of-mass energy
q Operational: 13 TeV
Luminosity
q Nominal: 1034 /cm2/s
q 2015 run: 5.13 x 1033 /cm2/s
Number of Bunches
q Nominal: 2808
q 2015 run: 2244

16. 22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 16

17. Lepton Reconstruction
Muons Electrons
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 17

18. Jet Algorithm
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 18
Collimated spray of hadrons
q Local deposits of energy
Anti-kT algorithm
q Size parameter R
◦ R = 0.4 for “standard” hadronic jets
◦ R = 0.8 for “boosted” jets
q Collinear, infra-red safe algorithm
q Iteratively combine particles
according to the distance dij

19. Search for
Diboson Resonances
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 19

20. Analysis Strategy
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 20
Define final state
q Two opposite-sign same-flavor leptons
q Two quarks merged into one jet
Split in channels and categories
q Muon/electron channel
q High/low purity category

21. Boosted Topology
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 21
ΔR versus Graviton Mass

22. Jet Substructure
21τ
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Events/0.25
0
500
1000
1500
2000
2500
3000
3500 CMS 2012
Z+jets (Madgraph)
,VV)tOther Backgrounds (t
=0.5 (x 4000))k
~
=1000 GeV,
G*
Bulk G* (M
= 8 TeVsCMS Preliminary -1
L dt = 19.8 fb∫
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 22
Jet pruned mass [GeV]
40 60 80 100 120 140 160
Events/5GeV
0
2000
4000
6000
8000
10000
CMS 2012
Z+jets (Madgraph)
,VV)tOther Backgrounds (t
=0.5 (x 4000))k
~
=1000 GeV,
G*
Bulk G* (M
= 8 TeVsCMS Preliminary -1
L dt = 19.8 fb∫
CMS-PAS-EXO-12-022

23. Event Selection

24. 22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 24
Graviton mass (GeV)
750 800 1000 1200 1400 1600 1800 2000 2500
Efficiency
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
= 0.5Pl
ZZ, k/M→bulkG
m channel NP e channel NP
m channel HP e channel HP
m channel LP e channel LP
Preliminary 13 TeVCMS
Selection Cut-flow and Signal Efficiency

25. Signal Characterization in Simulation
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 25
(GeV)
T
first generated muon p
0 100 200 300 400 500 600 700 800
normalized
0
0.01
0.02
0.03
0.04
0.05
Background
Mean 157.5
Std Dev 105.4
Signal
Mean 367.7
Std Dev 171.8
SimulationCMS
(GeV)
T
generated Z boson p
0 200 400 600 800 1000 1200 1400 1600
normalized
0
0.02
0.04
0.06
0.08
0.1
0.12
Background
Mean 317.3
Std Dev 116.6
Signal
Mean 738
Std Dev 128.2
SimulationCMS

26. Analysis of CMS Data
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 26

27. Analysis of CMS Data
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 27
Certified luminosity in 2015 data: 2.7 fb-1

28. Online Selection
(GeV)
T
leading lepton p
0 50 100 150 200 250
triggerefficiency
0
0.2
0.4
0.6
0.8
1
> 45 GeV
T
Muon trigger: p
> 105 GeV
T
Electron trigger: p
Preliminary 13 TeVCMS
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 28
CMS trigger
q Reduces event rate
◦ Level 1: 40 MHz à 100 kHz
◦ HLT: 100 kHz à 1 kHz
Thresholds
q Muons pT > 45 GeV
q Electrons pT > 105 GeV

29. Background Estimation
After event selection
q Some background remains
How much background remains?
q Yield estimation
How is it distributed?
q Shape estimation
Blind analysis
q Train models in the control region
q Use signal region for cross-validation
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 29
Background
Estimation
YIELD SHAPE
Jet mass (mj)
MC template
data driven
ZV invariant
(mZV)
Alpha method

30. 30
Background
Yield Estimation
Blind analysis
Signal region is hidden
Possible approaches
Monte Carlo estimation
SÃO PAULO RESEARCH AND ANALYSIS CENTER 3022 May 2017
jet pruned mass (GeV)
0 20 40 60 80 100 120 140 160 180 200 220
Events
5
10
15
20
25 Data (68) Stat. Unc.
DYJets (65) Diboson (1)
TT (1)
0 20 40 60 80 100 120 140 160 180 200 220
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 1.024
13 TeV
CMS
Preliminary

31. 31
Background
Yield Estimation
Blind analysis
Signal region is hidden
Possible approaches
Monte Carlo estimation
Pure data driven
SÃO PAULO RESEARCH AND ANALYSIS CENTER 3122 May 2017
Pruned Mass [GeV]
40 60 80 100 120 140 160 180 200
Events/5GeV
0
5
10
15
20
25
30
gaus
erf * expo
triangle
pol2

32. 32
Background
Yield Estimation
Blind analysis
Signal region is hidden
Possible approaches
Monte Carlo estimation
Pure data driven
MC templates + data driven
SÃO PAULO RESEARCH AND ANALYSIS CENTER 3222 May 2017
(GeV)J
m
20 40 60 80 100 120 140 160 180 200
Events/(5GeV)
1
10
2
10
muon channel high purity
Z+jets (186) (14)tVV, t
/ndof = 1.212χ
/ndof = 1.182χ
(13 TeV)-1
2.7 fb
CMS
Simulation

33. Background Shape Estimation: Alpha Method
Invariant mass in the control region
Alpha transfer factor from simulation
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 33

34. Background Shape Estimation: Alpha Method
Invariant mass in the control region
(GeV)ZVm
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
Events/(50GeV)
1
10
2
10
muon channel high purity
Data in SB (68)
Parametric model
7.0)±Z+jets (66
1.2)±(1.8tVV, t
muon channel high purity
Data in SB (68)
Parametric model
7.0)±Z+jets (66
1.2)±(1.8tVV, t
(13 TeV)-1
2.7 fb
CMS
Preliminary
Alpha transfer factor from simulation
(GeV)ZVm
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
Events/(50GeV)
1
10
muon channel high purity
Z+jets SB Z+jets SR
-functionα
muon channel high purity
Z+jets SB Z+jets SR
-functionα
(13 TeV)-1
2.7 fb
CMS
Simulation
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 34

35. Unblind Results: Jet Mass
Muon Low Purity
(GeV)Jm
20 40 60 80 100 120 140 160 180 200 220
Events/(5GeV)
0
10
20
30
40
50
60
70
80
90
muon channel low purity
Data (592)
Parametric model
30)±Z+jets (578
4.2)±(17.8tVV, t
Pulls
5−
0
5
(13 TeV)-1
2.7 fb
CMS
Preliminary
Electron Low Purity
(GeV)Jm
20 40 60 80 100 120 140 160 180 200 220
Events/(5GeV)
0
10
20
30
40
50
60
70
80
90
electron channel low purity
Data (412)
Parametric model
25)±Z+jets (399
3.7)±(13.5tVV, t
Pulls
5−
0
5
(13 TeV)-1
2.7 fb
CMS
Preliminary
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 35

36. Unblind Results: Jet Mass
Muon High Purity
(GeV)Jm
20 40 60 80 100 120 140 160 180 200 220
Events/(5GeV)
0
5
10
15
20
25
30
35
40
45
50
muon channel high purity
Data (222)
Parametric model
24)±Z+jets (194
3.8)±(14.2tVV, t
Pulls
5−
0
5
(13 TeV)-1
2.7 fb
CMS
Preliminary
Electron High Purity
(GeV)Jm
20 40 60 80 100 120 140 160 180 200 220
Events/(5GeV)
0
5
10
15
20
25
30
35
40
45
50
electron channel high purity
Data (155)
Parametric model
18)±Z+jets (118
3.5)±(12.5tVV, t
Pulls
5−
0
5
(13 TeV)-1
2.7 fb
CMS
Preliminary
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 36

37. Invariant Mass in Signal Region
Muon Low Purity
(GeV)ZV
m
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
Events/(50GeV)
1
10
2
10
muon channel low purity
Data in SR (157)
Parametric model
11.0)±Z+jets (150
2.6)±(7.4tVV, t
Pulls
5−
0
5
(13 TeV)-1
2.7 fb
CMS
Preliminary
Electron Low Purity
(GeV)ZV
m
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
Events/(50GeV)
1
10
2
10
electron channel low purity
Data in SR (116)
Parametric model
10.3)±Z+jets (105
2.1)±(5.3tVV, t
Pulls
5−
0
5
(13 TeV)-1
2.7 fb
CMS
Preliminary
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 37

38. Invariant Mass in Signal Region
Muon High Purity
(GeV)ZV
m
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
Events/(50GeV)
1
10
2
10
muon channel high purity
Data in SR (110)
Parametric model
7.8)±Z+jets (88
3.0)±(10.1tVV, t
Pulls
5−
0
5
(13 TeV)-1
2.7 fb
CMS
Preliminary
Electron High Purity
(GeV)ZV
m
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
Events/(50GeV)
1
10
2
10
electron channel high purity
Data in SR (85)
Parametric model
6.5)±Z+jets (53
3.0)±(9.3tVV, t
Pulls
5−
0
5
(13 TeV)-1
2.7 fb
CMS
Preliminary
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 38

39. Statistical Method
Counting experiment
q Number of events
◦ Poisson distribution
q Signal hypothesis
◦ 𝛍 = 1
q Background only
◦ 𝛍 = 0
q Test statistics
◦ Profile likelihood ratio: 𝛌(𝛍)
◦ By definition: 0 < 𝛌(𝛍) < 1
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 39
Signal strength Standard model
background

40. Confidence Limits
Muon Low Purity
VZ candidates mass [GeV]
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
[fb]ZZ→Grav
σLimit95%C.L.on
10
2
10
3
10
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
muon channel low purity
Observed limit
Expected 95% C.L. upper limit
σ1±Expected
σ2±Expected
= 0.5Pl
ZZ, k/M→bulkG
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
Electron Low Purity
VZ candidates mass [GeV]
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
[fb]ZZ→Grav
σLimit95%C.L.on
10
2
10
3
10
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
electron channel low purity
Observed limit
Expected 95% C.L. upper limit
σ1±Expected
σ2±Expected
= 0.5Pl
ZZ, k/M→bulkG
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 40

41. Confidence Limits
Muon High Purity
VZ candidates mass [GeV]
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
[fb]ZZ→Grav
σLimit95%C.L.on
10
2
10
3
10
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
muon channel high purity
Observed limit
Expected 95% C.L. upper limit
σ1±Expected
σ2±Expected
= 0.5Pl
ZZ, k/M→bulkG
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
Electron High Purity
VZ candidates mass [GeV]
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
[fb]ZZ→Grav
σLimit95%C.L.on
10
2
10
3
10
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
electron channel high purity
Observed limit
Expected 95% C.L. upper limit
σ1±Expected
σ2±Expected
= 0.5Pl
ZZ, k/M→bulkG
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 41

42. Confidence Limits Combination
Muon Channel
VZ candidates mass [GeV]
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
[fb]ZZ→Grav
σLimit95%C.L.on
10
2
10
3
10
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
muon channel
Observed limit
Expected 95% C.L. upper limit
σ1±Expected
σ2±Expected
= 0.5Pl
ZZ, k/M→bulkG
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
Electron Channel
VZ candidates mass [GeV]
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
[fb]ZZ→Grav
σLimit95%C.L.on
10
2
10
3
10
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
electron channel
Observed limit
Expected 95% C.L. upper limit
σ1±Expected
σ2±Expected
= 0.5Pl
ZZ, k/M→bulkG
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 42

43. Final Limit
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 43VZ candidates mass [GeV]
600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600
[fb]ZZ→Grav
σLimit95%C.L.on
10
2
10
3
10
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS
Combination of channels
Observed limit
Expected 95% C.L. upper limit
σ1±Expected
σ2±Expected
= 0.5Pl
ZZ, k/M→bulkG
-1
L dt = 2.69 fb∫= 13 TeVs2015CMS

44. Conclusions and
Outlook
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 44

45. Conclusions and Outlook
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 45
Search for diboson resonances
q ZZ semi-leptonic channel
q Data from CMS 2015 pp collisions
Most significant excess
q Invariant mass = 1 TeV
q P-value = 0.018
q Significance = 2σ
Benchmark model
q Randall-Sundrum bulk graviton
q No evidence found
Analysis with 2016 data
q Combined effort
◦ Higgs + B2G analysis groups
q Results with full statistics
◦ Under approval
Outlook
q LHC
◦ Additional 20 years of operation
◦ Integrated luminosity ∼2,500 fb-1
q Analysis technique improvement
◦ Machine Learning: disentangle jets

46. Acknowledgments
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 46

47. Thank You
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 47

48. Backup
CONTROL DISTRIBUTIONS
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 48

49. Jet Reconstruction
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 49
JetCollection = [ ]
Loop over list of constituents {
If dij < diB
q Recombine constituents i and j
else
q JetCollection.append ( i )
q constituents.remove( i )
}
arXiv:0802.1189

50. Selection of Primary Vertex
Muon Low Purity
number of primary vertices
0 2 4 6 8 10 12 14 16 18 20
Events
10
20
30
40
50
60
70
80
90 Data (398) Stat. Unc.
DYJets (429) Diboson (8)
TT (3)
0 2 4 6 8 10 12 14 16 18 20
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.904
13 TeV
CMS
Preliminary
Muon High Purity
number of primary vertices
0 2 4 6 8 10 12 14 16 18 20
Events
2
4
6
8
10
12
14
16
18
20
22
Data (67) Stat. Unc.
DYJets (65) Diboson (1)
TT (1)
0 2 4 6 8 10 12 14 16 18 20
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 1.011
13 TeV
CMS
Preliminary
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 50

51. Selection of Primary Vertex
Electron Low Purity
number of primary vertices
0 2 4 6 8 10 12 14 16 18 20
Events
10
20
30
40
50
60
70 Data (271) Stat. Unc.
DYJets (326) Diboson (6)
TT (3)
0 2 4 6 8 10 12 14 16 18 20
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.808
13 TeV
CMS
Preliminary
Electron High Purity
number of primary vertices
0 2 4 6 8 10 12 14 16 18 20
Events
2
4
6
8
10
12
14
16 Data (44) Stat. Unc.
DYJets (52) Diboson (1)
TT (0)
0 2 4 6 8 10 12 14 16 18 20
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.825
13 TeV
CMS
Preliminary
22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 51

52. (GeV)
T
leading lepton p
0 100 200 300 400 500 600 700 800Events
10
20
30
40
50
60
70 Data (397) Stat. Unc.
DYJets (428) Diboson (8)
TT (3)
0 100 200 300 400 500 600 700 800
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.903
13 TeV
CMS
Preliminary
Muon Low Purity Electron Low Purity
(GeV)
T
leading lepton p
0 100 200 300 400 500 600 700 800
Events
2
4
6
8
10 Data (68) Stat. Unc.
DYJets (65) Diboson (1)
TT (1)
0 100 200 300 400 500 600 700 800
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 1.026
13 TeV
CMS
Preliminary
Muon High Purity
(GeV)
T
leading lepton p
0 100 200 300 400 500 600 700 800
Events
1
2
3
4
5
6
7
8
9 Data (44) Stat. Unc.
DYJets (52) Diboson (1)
TT (0)
0 100 200 300 400 500 600 700 800
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.828
13 TeV
CMS
Preliminary
Electron High Purity22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 52
(GeV)
T
leading lepton p
0 100 200 300 400 500 600 700 800
Events
10
20
30
40
50
60 Data (274) Stat. Unc.
DYJets (326) Diboson (6)
TT (3)
0 100 200 300 400 500 600 700 800
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.817
13 TeV
CMS
Preliminary

53. (GeV)
T
second lepton p
0 50 100 150 200 250 300 350 400 450 500Events
10
20
30
40
50
60
Data (397) Stat. Unc.
DYJets (429) Diboson (8)
TT (3)
0 50 100 150 200 250 300 350 400 450 500
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.901
13 TeV
CMS
Preliminary
Muon Low Purity Electron Low Purity
(GeV)
T
second lepton p
0 50 100 150 200 250 300 350 400 450 500
Events
1
2
3
4
5
6
7
8
9 Data (68) Stat. Unc.
DYJets (65) Diboson (1)
TT (1)
0 50 100 150 200 250 300 350 400 450 500
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 1.024
13 TeV
CMS
Preliminary
Muon High Purity
(GeV)
T
second lepton p
0 50 100 150 200 250 300 350 400 450 500
Events
1
2
3
4
5
6
7
8
9 Data (44) Stat. Unc.
DYJets (52) Diboson (1)
TT (0)
0 50 100 150 200 250 300 350 400 450 500
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.825
13 TeV
CMS
Preliminary
Electron High Purity22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 53
(GeV)
T
second lepton p
0 50 100 150 200 250 300 350 400 450 500
Events
5
10
15
20
25
30
35
40
Data (274) Stat. Unc.
DYJets (327) Diboson (6)
TT (3)
0 50 100 150 200 250 300 350 400 450 500
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.815
13 TeV
CMS
Preliminary

54. (GeV)
T
leptonic Z p
100 200 300 400 500 600 700 800 900Events
20
40
60
80
100
Data (397) Stat. Unc.
DYJets (428) Diboson (8)
TT (3)
100 200 300 400 500 600 700 800 900
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.904
13 TeV
CMS
Preliminary
Muon Low Purity Electron Low Purity
(GeV)
T
leptonic Z p
100 200 300 400 500 600 700 800 900
Events
2
4
6
8
10
12
14
Data (67) Stat. Unc.
DYJets (64) Diboson (1)
TT (1)
100 200 300 400 500 600 700 800 900
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 1.013
13 TeV
CMS
Preliminary
Muon High Purity
(GeV)
T
leptonic Z p
100 200 300 400 500 600 700 800 900
Events
2
4
6
8
10
12
Data (44) Stat. Unc.
DYJets (52) Diboson (1)
TT (0)
100 200 300 400 500 600 700 800 900
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.829
13 TeV
CMS
Preliminary
Electron High Purity22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 54
(GeV)
T
leptonic Z p
100 200 300 400 500 600 700 800 900
Events
10
20
30
40
50
60
70
80 Data (273) Stat. Unc.
DYJets (326) Diboson (6)
TT (3)
100 200 300 400 500 600 700 800 900
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.815
13 TeV
CMS
Preliminary

55. leptonic Z mass (GeV)
50 60 70 80 90 100 110 120 130Events
20
40
60
80
100
120
140
160
Data (398) Stat. Unc.
DYJets (429) Diboson (8)
TT (3)
50 60 70 80 90 100 110 120 130
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.903
13 TeV
CMS
Preliminary
Muon Low Purity Electron Low Purity
leptonic Z mass (GeV)
50 60 70 80 90 100 110 120 130
Events
2
4
6
8
10
12
14
16
18
20
22 Data (68) Stat. Unc.
DYJets (65) Diboson (1)
TT (1)
50 60 70 80 90 100 110 120 130
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 1.024
13 TeV
CMS
Preliminary
Muon High Purity
leptonic Z mass (GeV)
50 60 70 80 90 100 110 120 130
Events
2
4
6
8
10
12
14
16
18
20
22 Data (44) Stat. Unc.
DYJets (52) Diboson (1)
TT (0)
50 60 70 80 90 100 110 120 130
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.825
13 TeV
CMS
Preliminary
Electron High Purity22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 55
leptonic Z mass (GeV)
50 60 70 80 90 100 110 120 130
Events
20
40
60
80
100
120
140
160
Data (274) Stat. Unc.
DYJets (327) Diboson (6)
TT (3)
50 60 70 80 90 100 110 120 130
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.815
13 TeV
CMS
Preliminary

56. (GeV)
T
jet p
100 200 300 400 500 600 700 800 900Events
20
40
60
80
100
120
Data (396) Stat. Unc.
DYJets (426) Diboson (8)
TT (3)
100 200 300 400 500 600 700 800 900
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.906
13 TeV
CMS
Preliminary
Muon Low Purity Electron Low Purity
(GeV)
T
jet p
100 200 300 400 500 600 700 800 900
Events
2
4
6
8
10
12
14
Data (66) Stat. Unc.
DYJets (64) Diboson (1)
TT (1)
100 200 300 400 500 600 700 800 900
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 1.006
13 TeV
CMS
Preliminary
Muon High Purity
(GeV)
T
jet p
100 200 300 400 500 600 700 800 900
Events
2
4
6
8
10
12
Data (43) Stat. Unc.
DYJets (52) Diboson (1)
TT (0)
100 200 300 400 500 600 700 800 900
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.817
13 TeV
CMS
Preliminary
Electron High Purity22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 56
(GeV)
T
jet p
100 200 300 400 500 600 700 800 900
Events
10
20
30
40
50
60
70
80 Data (271) Stat. Unc.
DYJets (325) Diboson (6)
TT (3)
100 200 300 400 500 600 700 800 900
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.812
13 TeV
CMS
Preliminary

57. jet pruned mass (GeV)
0 20 40 60 80 100 120 140 160 180 200 220Events
20
40
60
80
100
120
140
Data (398) Stat. Unc.
DYJets (429) Diboson (8)
TT (3)
0 20 40 60 80 100 120 140 160 180 200 220
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.903
13 TeV
CMS
Preliminary
Muon Low Purity Electron Low Purity
jet pruned mass (GeV)
0 20 40 60 80 100 120 140 160 180 200 220
Events
5
10
15
20
25 Data (68) Stat. Unc.
DYJets (65) Diboson (1)
TT (1)
0 20 40 60 80 100 120 140 160 180 200 220
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 1.024
13 TeV
CMS
Preliminary
Muon High Purity
jet pruned mass (GeV)
0 20 40 60 80 100 120 140 160 180 200 220
Events
2
4
6
8
10
12
14
16
Data (44) Stat. Unc.
DYJets (52) Diboson (1)
TT (0)
0 20 40 60 80 100 120 140 160 180 200 220
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.825
13 TeV
CMS
Preliminary
Electron High Purity22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 57
jet pruned mass (GeV)
0 20 40 60 80 100 120 140 160 180 200 220
Events
10
20
30
40
50
60
70
80
90 Data (274) Stat. Unc.
DYJets (327) Diboson (6)
TT (3)
0 20 40 60 80 100 120 140 160 180 200 220
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.815
13 TeV
CMS
Preliminary

58. 21
N-subjettiness tau
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1Events
10
20
30
40
50
60
70
80
90
Data (398) Stat. Unc.
DYJets (429) Diboson (8)
TT (3)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.903
13 TeV
CMS
Preliminary
Muon Low Purity Electron Low Purity
21
N-subjettiness tau
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Events
5
10
15
20
25
30 Data (68) Stat. Unc.
DYJets (65) Diboson (1)
TT (1)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 1.024
13 TeV
CMS
Preliminary
Muon High Purity
21
N-subjettiness tau
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Events
2
4
6
8
10
12
14
16
18
20
22
Data (44) Stat. Unc.
DYJets (52) Diboson (1)
TT (0)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.825
13 TeV
CMS
Preliminary
Electron High Purity22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 58
21
N-subjettiness tau
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Events
10
20
30
40
50
60
70
Data (274) Stat. Unc.
DYJets (327) Diboson (6)
TT (3)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.815
13 TeV
CMS
Preliminary

59. VZ candidate mass (GeV)
500 1000 1500 2000 2500 3000 3500 4000Events
1−
10
1
10
2
10
3
10
Data (398) Stat. Unc.
DYJets (429) Diboson (8)
TT (3)
500 1000 1500 2000 2500 3000 3500 4000
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.903
13 TeV
CMS
Preliminary
Muon Low Purity Electron Low Purity
VZ candidate mass (GeV)
500 1000 1500 2000 2500 3000 3500 4000
Events
1−
10
1
10
2
10
Data (68) Stat. Unc.
DYJets (65) Diboson (1)
TT (1)
500 1000 1500 2000 2500 3000 3500 4000
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 1.024
13 TeV
CMS
Preliminary
Muon High Purity
deltaR(lep,jet)
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Events
2
4
6
8
10
12
14
16 Data (44) Stat. Unc.
DYJets (52) Diboson (1)
TT (0)
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.825
13 TeV
CMS
Preliminary
Electron High Purity22 May 2017 SÃO PAULO RESEARCH AND ANALYSIS CENTER 59
deltaR(lep,jet)
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Events
20
40
60
80
100
Data (274) Stat. Unc.
DYJets (327) Diboson (6)
TT (3)
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Data/MC
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
Data/MC ratio = 0.815
13 TeV
CMS
Preliminary