Measurement of the Z boson cross-section in - Harvard University ...

Chapter 9: Discussion and Outlook 243
[GeV]
T
p
100
90
80
70
60
50
40
30
20
Data 2010( s = 7 TeV)
Z → µ µ
Backgrounds
-1
∫L
dt = 3.37 pb
0 20 40 60 80 100 120
mµ
µ [GeV]
[GeV]
T
p
100
90
80
70
60
50
40
30
20
∫
Data 2010( s = 7 TeV)
Z → µ µ
Backgrounds
-1
L dt = 3.37 pb
0 20 40 60 80 100 120
mµ
µ [GeV]
Figure 9.5: Muon pT versus dimuon invariant mass for signal Monte Carlo, background
Monte Carlo and data: after the muon pT cut (left) and after the isolation
cut (right).
Entries/2.5 GeV
180
160
140
120
100
80
60
40
20
ATLAS Preliminary
Data 2010 ( s=7
TeV)
Z → µ µ
-1
∫L
dt = 3.37 pb
0
0 20 40 60 80 100 120
p Z [GeV]
T
Entries/0.3
160
140
120
100
80
60
40
20
-1
∫L
dt = 3.37 pb
Data 2010 ( s=7
TeV)
Z → µ µ
0
-3 -2 -1 0 1 2 3
Z
Y
Figure 9.6: Z boson pT and rapidity spectra after full event selection. The Monte
Carlo event numbers have been normalized to the number of data events.