Preliminary Result of mutau Channel
2013-2-12
13年2月12⽇日星期⼆二
1
Tau selection
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13年2月12⽇日星期⼆二
Loose tau selection criteria(for Bkg estimation)
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Et > 25 GeV (20GeV -> 25GeV)
|eta|<2.5, remove |eta|<0.03
author ==1||3
Ntrk
==1
EleBDTMedium
MuonVeto
Electron(Muon) overlap remove
Tight tau selection criteria(for events selection)
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•
Loose selection
JetBDTSigMedium
2
Event Selection (etau/mutau)
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Single lepton Trigger(with high Isolation requirement) & GRL
Good Primary vertex
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13年2月12⽇日星期⼆二
Requirement: First vertex is good
Exactly 1 electron&1 tau (1 muon&1 tau)
2nd loose electron, muon, tau veto (using Loose Lepton selection)
2 leptons with opposite charge
Dphi(elec/muon,tau)>2.7
Pt(Elec/Muon)-Et(tau)>0
3
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Background Estimation
Using charge based method to get the numbers of Wjet and QCD.
The shape of Wjet&QCQ got by 2 ways
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From MC, the statistics is enough to get nice shape.
Bin by Bin charge based method, same as emu channel. ( right )
Mass<200
Mass>200
Ztautau
7043.4
40
Zmumu
9154.6
222.8
WW
165.6
88.2
Top
26.5
22.2
Ttbar
320.1
314.5
Wjet+QCD
10242.5
8822.5
1410.2
1611.9
Total Estimated
26952.7
25532.7
2097.9
2299.6
Total Observed
13年2月12⽇日星期⼆二
( Left )
26813
2461
4
All the plots have divided by
binsize, plan to do it after we
decided the bin width.
Mass(mu,tau,met)
Hadronic τ from the decay of a heavy sneutrino decay in a frame of reference that is highly boosted
relative to the detector; therefore, the neutrino and the resultant jet are approximately collinear and
have approximately the same η.
Mass<200
Bin by Bin
104
103
104
s = 8 TeV
Ldt = 14.0 fb
-1
103
102
10
10
1
1
-1
101.6
-1
101.6
Data/SM
Data/SM
102
Data
Ztautau
Zmumu
WW
Single Top
Ttbar
Wjet
QCD
MC
1.4
1.2
1
1.2
1
0.8
0.6
0.6
0.4
2
10
13年2月12⽇日星期⼆二
-1
Ldt = 14.0 fb
1.4
0.8
0.4
s = 8 TeV
Data
Ztautau
Zmumu
WW
Single Top
Ttbar
Wjet
QCD
Invariant Mass [GeV]
102
Invariant Mass [GeV]
5
Mass(mu,tau,met)
Mass>200
Bin by Bin
103
-1
102
Ldt = 14.0 fb
10
102
10
1
-1
101.6
-1
101.6
1.2
1
1.4
1.2
1
0.8
0.8
0.6
0.6
0.4
3
10
Invariant Mass [GeV]
Problems
13年2月12⽇日星期⼆二
-1
Ldt = 14.0 fb
1
1.4
Data
Ztautau
Zmumu
WW
Single Top
Ttbar
Wjet
QCD
s = 8 TeV
Data/SM
Data/SM
103
Data
Ztautau
Zmumu
WW
Single Top
Ttbar
Wjet
QCD
s = 8 TeV
MC
0.4
103
Invariant Mass [GeV]
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The MC shape shows good agreement in unBlind region(mass<200), but the
bin by bin method gives better result in blind region(mass>200).
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The other plots are from MC shape, if we want to get them with bin by bin
method, the numbers wouldn’t be same.
6
Full Mass region
Pt(muon)
104
Et(tau)
s = 8 TeV
-1
Ldt = 14.0 fb
103
104
Data
Ztautau
Zmumu
WW
Single Top
Ttbar
Wjet
QCD
s = 8 TeV
3
10
-1
Ldt = 14.0 fb
Data
Ztautau
Zmumu
WW
Single Top
Ttbar
Wjet
QCD
102
102
10
10
Data/SM
Data/SM
1
1.6
1.4
1.2
1
1.6
1.4
1.2
1
0.8
0.8
0.6
0.6
0.4
0
50
100
150
200
250
Transverse momentum [GeV]
13年2月12⽇日星期⼆二
0.4
0
50
100
150
200
250
Transverse momentum [GeV]
7
Full Mass region
Number of jet
MissingEt
30000
25000
Data
Ztautau
Zmumu
WW
Single Top
Ttbar
Wjet
QCD
s = 8 TeV
20000
104
-1
Ldt = 14.0 fb
15000
10000
s = 8 TeV
103
-1
Ldt = 14.0 fb
102
Data
Ztautau
Zmumu
WW
Single Top
Ttbar
Wjet
QCD
10
5000
1.6
Data/SM
Data/SM
1
1.4
1.2
1
1.6
1.4
1.2
1
0.8
0.8
0.6
0.6
0.4
0
1
2
3
4
5
6
7
8
9
10
Number of Jet
13年2月12⽇日星期⼆二
0.4
0
50
100
150
200
250
Missing Et [GeV]
8