1. ttbar + jets AOD analysis
fully- leptonic (e/μ)

2. semi- vs fully- leptonic events (5200 sample, tid=5997)
# of events
fully-leptonic
semi-leptonic
4/5
1/5
remove tau events
8/15
4/45
electronic
muonic ee μμ
lepton universality eμ
4/15
4/15
1/45
2/45
1/45
more difficult to build up adequate statistics in fully leptonic channel
(1/61/12 fewer events)

3. Aside: Sherpa fully-leptonic cross-sections
order?
CoM
tt (pb)
(ratio to 14TeV)
tt + 1 jet (pb)
14 TeV
± 0.16%
± 1.0%
12 TeV
98.18 ± 0.15%
(0.74)
± 0.99%
(0.66)
10 TeV
64.29 ± 0.16
(0.47)
92.09 ± 0.94
(0.39)

4. fullyleptonic channel ‘DPD’ maker
*good lepton:
remove electrons in crack region (1.37<|η|<1.52)
isolation requirement ΣEtΔR<0.2 <6GeV
fullyleptonic channel ‘DPD’ maker
basic method:
two high pt leptons of opposite sign
two high pt jets considered to be b-jet
triggers:
PassedL1_e25i || PassedL1_mu20 || PassedL1_mu40
PassedL2_e25i || PassedL2_mu20i
PassedEF_e25i || PassedEF_mu20i (|| dilepton trigger?)
selection:
≥2 good* leptons Ptlep>20GeV , |ηlep|<2.5
Etmiss>25GeV
≥2 jets(ΔR=0.4) with Ptjet>20GeV , |ηjet|<2.5
remove same sign lepton events
implemented in AOD

5. additional constraints for analysis
lepton definitions
electron can be loose (isEM&0x7==0), medium (isEM&0x3FF==0) or tight (isEM==0)
muons have bestmatch (bestmatch==1), chisquared (matchchi2<100) or comb (matchchi2<100 && bestmatch==1)
this choice affects the jet multiplicity
which in turn has an effect on the muon isolation (no jet within ΔR<0.2)
and additional cuts (Z peak & Etmiss>35GeV) on events
currently using...
≥2 loose (or better) electrons || two comb muons* || one of each
Etmiss>35GeV (same flavour), Etmiss>25GeV (diff. flavour)
Z peak veto
implemented in histogram code
relaxed cuts on mixed events
* muons now isolated

6. loose electrons with comb muons
first analysis
two triggers
loose electrons with comb muons

7. subsample(% of sample) e25i (%) mu20i both total
exclusive
addition of 2e15 trigger
trigger passes
trigger
subsample(% of sample)
e25i
(%)
mu20i
both
total
dielectron (2.1)
75.0
0.4
1.6
77.0 (78.0)
dimuon (2.2)
82.2
0.2
82.4
mixed (4.4)
20.9
28.7
32.0
81.7
fulllep total (8.8)
28.6
35.5
16.6
80.7 (81.0)
electron (27.2)
51.8
1.5
2.0
55.3
muon (26.4)
0.1
60.0
60.3
semlep total (53.5)
26.3
30.4
1.1
57.8
taus (37.7)
6.0
7.2
0.8
14.0

8. sub-selection passes WITHOUT LEPTON DEFINITIONS
*all percentages relative to original subset
exclusive
sub-selection passes WITHOUT LEPTON DEFINITIONS
sub-sample
trigger
(%*)
lep
jet
charge
MET(%*)
(25GeV)
all
dielectron
77.0
38.0
76.6
47.1
69.1
18.4
dimuon
82.4
42.6
71.1
77.8
75.7
29.7
mixed
81.7
36.6
79.0
70.6
74.2
30.4
fully leptonic
80.7
38.5
76.4
66.8
73.3
27.3
electron
55.3
5.4
55.2
2.9
muon
60.4
5.2
59.3
3.0
semi leptonic
57.8
2.3
26.0
taus
14.0
2.7
13.2
11.5
12.7
1.8

9. sub-selection passes WITH LEPTON DEFINITIONS
≥2 loose els / ≥2 comb mus / ≥1 loose el & ≥1 comb mu
exclusive
sub-selection passes WITH LEPTON DEFINITIONS
sub-sample
pre-
def (%)
lep
(%)
jet
charge
MET
Z-peak (%)
all
dielectron
18.4
17.7
11.8
16.7
16.1
14.4
8.9
dimuon
29.7
26.9
18.6
26.8
24.2
24.1
14.8
mixed
30.4
28.5
23.6
27.8
28.4
0.4
22.8
fully leptonic
27.3
25.5
19.5
24.9
24.4
9.8
17.4
electrons
2.9
2.3
2.2
1.2
0.1
1.1
muons
3.0
1.9
1.6
1.7
semi
leptonic
2.1
1.5
2.0
0.6
taus
1.8
1.3
1.4
0.5
0.9

10. selection passes per channel WITHOUT LEPTON DEFINITIONS
exclusive
selection passes per channel WITHOUT LEPTON DEFINITIONS
selection
subsample(% of sample)
electron
(%)
muon
mixed
total
dielectron (2.1)
16.2
2.2
18.4
dimuon (2.2)
28.5
1.2
29.7
mixed (4.4)
0.2
0.3
29.9
30.4
fulllep total (8.8)
4.0
7.4
15.9
27.3
electron (27.2)
0.4
0.0
2.5
2.9
muon (26.4)
1.5
1.4
3.0
semlep total (53.5)
0.8
2.0
taus (37.7)
1.1
1.8

11. selection passes per channel WITH LEPTON DEFINITIONS
≥2 loose els / ≥2 comb mus / ≥1 loose el & ≥1 comb mu
exclusive
selection passes per channel WITH LEPTON DEFINITIONS
selection
subsample(% of sample)
electron
(%)
muon
mixed
total
dielectron (2.1)
8.7
0.2
8.9
dimuon (2.2)
14.5
0.3
14.8
mixed (4.4)
0.1
0.0
22.7
22.8
fulllep total (8.8)
2.1
3.7
11.6
17.4
electron (27.2)
1.1
1.2
muon (26.4)
0.7
0.4
semlep total (53.5)
taus (37.7)
0.6
0.9

12. number of selected events WITH LEPTON DEFINITIONS
≥2 loose els / ≥2 comb mus / ≥1 loose el & ≥1 comb mu
20 pb-1
exclusive
number of selected events WITH LEPTON DEFINITIONS
selection
subsample(% of sample)
electron
events
muon
mixed
total
dielectron (2.1) 16 1 17
dimuon (2.2) 30 31
mixed (4.4) 93 94
fulllep total (8.8)
142
electron (27.2) 3 27
muon (26.4) 18 10
semlep total (53.5) 37 57
taus (37.7) 4 7 20

13. medium electrons with comb muons
first analysis
two triggers
medium electrons with comb muons

14. sub-selection passes WITH LEPTON DEFINITIONS
≥2 medium els / ≥2 comb mus / ≥1 medium el & ≥1 comb mu
exclusive
sub-selection passes WITH LEPTON DEFINITIONS
sub-sample
pre-
def (%)
lep
(%)
jet
charge
MET
Z-peak (%)
all
dielectron
18.4
13.5
9.1
12.5
12.2
10.5
6.7
dimuon
29.7
26.7
18.7
26.6 24
24.2
15.1
mixed
30.4
23.9
19.7
23.6
23.8
0.3
19.1
fully leptonic
27.3
22.1
16.9
21.7
21.1
8.9
electrons
2.9
1.9
1.8
1.0
0.0
0.9
muons
3.0
1.4
1.1
1.3
1.2
0.8
semi
leptonic
1.6
1.5
0.6
taus
0.5
0.7

15. number of selected events WITH LEPTON DEFINITIONS
≥2 medium els / ≥2 comb mus / ≥1 medium el & ≥1 comb mu
20 pb-1
exclusive
number of selected events WITH LEPTON DEFINITIONS
selection
subsample(% of sample)
electron
events
muon
mixed
total
dielectron (2.1) 12 1 13
dimuon (2.2) 31
mixed (4.4) 79
fulllep total (8.8) 80
123
electron (27.2) 23
muon (26.4) 18 2 20
semlep total (53.5) 25 44
taus (37.7) 3 7 15 24

16. tight electrons with comb muons
first analysis
two triggers
tight electrons with comb muons

17. sub-selection passes WITH LEPTON DEFINITIONS
≥2 tight els / ≥2 comb mus / ≥1 tight el & ≥1 comb mu
exclusive
sub-selection passes WITH LEPTON DEFINITIONS
sub-sample
pre-
def (%)
lep
(%)
jet
charge
MET
Z-peak (%)
all
dielectron
18.4
9.1
6.1
8.4
6.8
4.6
dimuon
29.7
26.5
18.7
23.8
24.4
15.1
mixed
30.4
19.8
16.3
19.6
19.7
0.4
15.8
fully leptonic
27.3
18.9
14.4
18.6
18.0
8.1
12.9
electrons
2.9
1.6
1.4
0.8
0.0
muons
3.0
1.3
1.1
semi
leptonic
1.0
0.6
taus
1.8
0.7
0.9

18. number of selected events WITH LEPTON DEFINITIONS
≥2 tight els / ≥2 comb mus / ≥1 tight el & ≥1 comb mu
20 pb-1
exclusive
number of selected events WITH LEPTON DEFINITIONS
selection
subsample(% of sample)
electron
events
muon
mixed
total
dielectron (2.1) 8 1 9
dimuon (2.2) 31
mixed (4.4) 65
fulllep total (8.8) 66
105
electron (27.2) 19
muon (26.4) 20
semlep total (53.5) 21 40
taus (37.7) 2 7 12

19. conclusion ?

20. backups
backups

21. fullyleptonic CSC recipe
triggers:
“a combination of single-lepton and di-lepton triggers”
 eμ = 97%, ee = 98%, μμ = 96%
(pre-)selection:
2 high pt leptons (20GeV)
at least one electron is tight  remover fake leptons
isolation of electrons, ΣEtΔR<0.2 <6GeV  remove semlep
bestmatch muons
muon isolation, remover muons closer than ΔR=0.2 to a jet
‘off-line’ selection:
Z peak veto 15-95GeV
exactly 2 leptons, at least two jets
Etmiss ≥ 30GeV over all channels, ≥ 35GeV same flavor, ≥25GeV mixed

22. loose electron and comb muons + Z veto in AOD preselection
first analysis
two triggers
loose electron and comb muons
+ Z veto in AOD preselection

23. selection passes WITHOUT LEPTON DEFINITIONS
with Z veto in AOD
exclusive
selection passes WITHOUT LEPTON DEFINITIONS
selection
subsample(% of sample)
electron
(%)
muon
mixed
total
dielectron (2.1)
14.8
2.1
16.9
dimuon (2.2)
26.3
1.1
27.4
mixed (4.4)
0.2
0.3
30.4
29.4
fulllep total (8.8)
3.7
6.8
15.7
26.4
electron (27.2)
0.4
0.0
2.5
2.9
muon (26.4)
1.4
semlep total (53.5)
0.7
2.0
taus (37.7)
1.8

24. selection passes WITH LEPTON DEFINITIONS
≥2 loose els / ≥2 comb mus / ≥1loose el & ≥1 comb mu
with Z veto in AOD
exclusive
selection passes WITH LEPTON DEFINITIONS
selection
subsample(% of sample)
electron
(%)
muon
mixed
total
dielectron (2.1)
8.7
0.2
8.9
dimuon (2.2)
14.5
0.3
14.8
mixed (4.4)
0.1
0.0
22.7
22.8
fulllep total (8.8)
2.1
3.7
11.6
17.4
electron (27.2)
1.1
1.2
muon (26.4)
0.7
0.4
semlep total (53.5)
taus (37.7)
0.6
0.9

25. first analysis
three triggers

26. trigger passes with addition of 2e15 trigger
exclusive
trigger passes with addition of 2e15 trigger
trigger
subsample(% of sample)
e25i
(%)
mu20i
both
2e15
only (%)
total
dielectron (2.1)
75.0
0.4
1.6
0.9
78.0
dimuon (2.2)
82.2
0.2
82.4
mixed (4.4)
20.9
28.7
32.0
81.2
fulllep total (8.8)
28.6
35.5
16.6
81.0
electron (27.2)
51.8
1.5
2.0
55.3
muon (26.4)
0.1
60.0
60.3
semlep total (53.5)
26.3
30.4
1.1
57.8
taus (37.7)
6.0
7.2
0.8
14.0

27. loose electrons with comb muons
first analysis
two triggers
loose electrons with comb muons
+moved charge veto from AOD preselection

28. sub-selection passes WITHOUT LEPTON DEFINITIONS
*all percentages relative to original subset
exclusive
sub-selection passes WITHOUT LEPTON DEFINITIONS
sub-sample
trigger
(%*)
lep
jet
MET(%*)
(25GeV)
all
dielectron
77.0
38.0
76.6
69.1
33.0
dimuon
82.4
42.6
71.1
75.7
33.7
mixed
81.7
36.6
79.0
74.2
32.8
fully leptonic
80.7
38.5
76.4
73.3
33.1
electron
55.3
5.4
55.2
4.5
muon
60.4
5.2
59.3
4.4
semi leptonic
57.8
2.3
26.0
taus
14.0
2.7
13.2
12.7
2.4

29. sub-selection passes WITH LEPTON DEFINITIONS
≥2 loose els / ≥2 comb mus / ≥1 loose el & ≥1 comb mu
exclusive
sub-selection passes WITH LEPTON DEFINITIONS
sub-sample
pre-
def (%)
lep
(%)
jet
charge
MET
Z-peak (%)
all
dielectron
33.0
32.0
23.8
31.1
29.0
28.1
17.5
dimuon
33.7
30.5
20.0
31.8
27.6
31.2 15
mixed
32.8
30.4
24.8
30.3
30.2
0.7
23.5
fully leptonic
33.1
30.8
23.3
30.9
29.3
15.1
19.9
electrons
4.5
3.2
2.9
1.8
3.3
0.8
1.4
muons
4.4
3.0
2.5
2.6
2.1
1.2
semi
leptonic
3.1
2.7
2.8
1.5
1.3
taus
2.4
1.9
1.7
1.0

30. number of selected events WITH LEPTON DEFINITIONS
≥2 loose els / ≥2 comb mus / ≥1 loose el & ≥1 comb mu
20 pb-1
exclusive
number of selected events WITH LEPTON DEFINITIONS
selection
subsample(% of sample)
electron
events
muon
mixed
total
dielectron (2.1) 33 1 34
dimuon (2.2) 30 31
mixed (4.4) 97
fulllep total (8.8) 98
162
electron (27.2) 7 29 36
muon (26.4) 18 11
semlep total (53.5) 40 65
taus (37.7) 8 20