Violation in Mixing

84 Ã Ë reconstruction and efficiency studies
0.504
0.502
0.5
0.498
0.496
0.494
observed Ks candidate mass
0.492
-3 -2 -1 0 1 2 3
ks daughter phi angle
0.008
0.007
0.006
0.005
0.004
0.003
0.002
0.001
observed Ks candidate mass resolution
0
-3 -2 -1 0 1 2 3
ks daughter phi angle
0.504
0.502
0.5
0.498
0.496
0.494
observed Ks candidate mass
0.492
-3 -2 -1 0 1 2 3
ks daughter phi angle
0.008
0.007
0.006
0.005
0.004
0.003
0.002
0.001
observed Ks candidate mass resolution
0
-3 -2 -1 0 1 2 3
ks daughter phi angle
Figure 3-4. Top plots: invariant mass as function of the � angle of the Ã Ë daughters in both b1 (left) and
b2 (right) data-sets of on-resonance data. Bottom plots: invariant mass resolution as function of the � angle
of the Ã Ë daughters in both b1 (left) and b2 (right) data-sets of on-resonance data. The data-Monte Carlo
comparison is presented: the empty dots come from the Monte Carlo sample and the black points come from
the on resonance data.
� corr � �
Ø
� �
Ø ¡ ¯ À Ø
where Ø runs over , Ù�× and ��, � Ø�
Ø is the non-corrected cross section (see Tab. 2-2) and ¯ À Ø is the hadronic
efficiency for each sample.
The effective number of ÃË per events (�ÃË ) can be calculated:
MARCELLA BONA
� corr
ÃË �
È
Ø �Ø� Ø ¡ ¯À Ø ¡ � Ø ÃË
�corr