CERN-THESIS-2012-153 26/07/2012 - CERN Document Server
CERN-THESIS-2012-153 26/07/2012 - CERN Document Server
CERN-THESIS-2012-153 26/07/2012 - CERN Document Server
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Events / 10 GeV<br />
Events / 10 GeV<br />
14<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
ATLAS<br />
1<br />
∫ L dt = 2.1 fb<br />
3ID<br />
data<br />
tt→<br />
WbZq signal<br />
ttW/Z<br />
tt<br />
(SM)<br />
Z+jets<br />
dibosons<br />
bkg. uncertainty<br />
0<br />
0 20 40 60 80 100120140160180200<br />
8<br />
7<br />
6<br />
5<br />
4<br />
3<br />
2<br />
1<br />
ATLAS<br />
1<br />
∫ L dt = 2.1 fb<br />
3ID<br />
(a)<br />
miss<br />
ET<br />
[GeV]<br />
0<br />
0 20 40 60 80 100120140160180200<br />
Leading lepton p<br />
T<br />
(c)<br />
data<br />
tt→<br />
WbZq signal<br />
ttW/Z<br />
tt<br />
(SM)<br />
Z+jets<br />
dibosons<br />
bkg. uncertainty<br />
[GeV]<br />
Events<br />
Events / 2 GeV<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
0<br />
14<br />
12<br />
10<br />
8<br />
6<br />
4<br />
2<br />
0<br />
ATLAS Internal<br />
1<br />
∫ L dt = 2.1 fb<br />
3ID<br />
data<br />
tt→<br />
WbZq signal<br />
ttW/Z<br />
tt<br />
(SM)<br />
dibosons<br />
Z+jets<br />
bkg. uncertainty<br />
0 1 2 3 4 5 6 7 8<br />
ATLAS<br />
1<br />
∫ L dt = 2.1 fb<br />
3ID<br />
(b)<br />
Number of jets<br />
data<br />
tt→<br />
WbZq signal<br />
ttW/Z<br />
tt<br />
(SM)<br />
Z+jets<br />
dibosons<br />
bkg. uncertainty<br />
80 85 90 95 100 105<br />
(d)<br />
mll<br />
[GeV]<br />
Figure 5.16: Distributions of the 3ID analysis after the final event selection. (a) E miss<br />
T , (b) number of<br />
ID jets, (c) pT of the leading lepton, and (d) reconstructed mass of the two leptons with same flavor and<br />
opposite charge. The uncertainties shown are both MC simulation statistical and the data-driven background<br />
estimation uncertainties. The signal distributions are normalized to the observed BR limit, at 95% CL.<br />
74