Etude et impact du bruit de fond corrélé pour la mesure de l'angle ...
Etude et impact du bruit de fond corrélé pour la mesure de l'angle ...
Etude et impact du bruit de fond corrélé pour la mesure de l'angle ...
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5.2 High energy analysis 113<br />
tel-00821629, version 1 - 11 May 2013<br />
s)<br />
Entries/(2 "<br />
10 -1<br />
10 -2<br />
-3<br />
10<br />
Entries 434<br />
2<br />
/ ndf<br />
45.03 / 38<br />
Prob 0.2012<br />
c SM<br />
2.229 !<br />
0.273<br />
c FN<br />
1.039 !<br />
0.094<br />
SM<br />
2.178 !<br />
0.317<br />
31.15 !<br />
4.85<br />
0 10 20 30 40 50 60 70 80 90 100<br />
FN<br />
Time (" s)<br />
Figure 5.3: Time corre<strong>la</strong>tion b<strong>et</strong>ween prompt and <strong>de</strong><strong>la</strong>yed events with<br />
prompt in [12, 30] MeV. The histogram is fitted by a two exponential mo<strong>de</strong>l<br />
in or<strong>de</strong>r to <strong>de</strong>scribe the short time corre<strong>la</strong>tion, ⌧ ⇠ 2.2 µs, <strong>du</strong>e to SM (blue<br />
dashed line) and the longer time corre<strong>la</strong>tion, ⌧ ⇠ 30 µs, <strong>du</strong>e to FN (red<br />
dashed line). FN and SM components are separated by imposing a cut on<br />
the time corre<strong>la</strong>tion. The cut e ciency and purity for each component are<br />
estimated using the exponential mo<strong>de</strong>l.
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