Violation in Mixing
Violation in Mixing
Violation in Mixing
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7.5 Background characterization 173<br />
��<br />
Sample Lepton Kaon NT1 NT2 Untagged<br />
MC truth �� ¦ � �� ¦ � �� ¦ �� �� ¦ � ���� ¦ �<br />
MC fit �� ¦ � � ¦ � �� ¦ �� �� ¦ � ���� ¦ �<br />
Run 1 � � (FR) � ¦ � ��� ¦ �� ��� ¦ �� �� ¦ �� ��� ¦ �<br />
Run 1 � � (SB) � ¦ � �� ¦ �� ��� ¦ � �� ¦ �� ��� ¦ ��<br />
Run 1 + 2 � � (SB) � ¦ � �� ¦ �� ��� ¦ � ��� ¦ �� ���� ¦ ��<br />
�<br />
MC truth � ¦ �� ��� ¦ �� �� ¦ �� ��� ¦ � ��� ¦ ��<br />
MC fit � ¦ �� �� ¦ �� �� ¦ �� �� ¦ � ��� ¦ ��<br />
Run 1 � � (FR) � ¦ � � ¦ � ��� ¦ �� ��� ¦ � ���� ¦ ��<br />
Run 1 � � (SB) � ¦ � � ¦ �� ��� ¦ �� �� ¦ �� ���� ¦ ��<br />
Run 1 + 2 � � (SB) � ¦ � � ¦ �� ��� ¦ � �� ¦ �� ��� ¦ ��<br />
ÃÃ<br />
MC truth � ¦ �� ��� ¦ �� ��� ¦ � ��� ¦ �� � �� ¦ �<br />
MC fit �� ¦ �� �� ¦ �� ��� ¦ � � ¦ �� � �� ¦ �<br />
Run 1 � � (FR) �� ¦ �� �� ¦ � ��� ¦ �� �� ¦ � ���� ¦ �<br />
Run 1 � � (SB) �� ¦ � � ¦ �� ��� ¦ �� ��� ¦ �� ���� ¦ ��<br />
Run 1 + 2 � � (SB) �� ¦ � �� ¦ �� ��� ¦ �� ��� ¦ �� ��� ¦ ��<br />
“Other”<br />
MC truth �� ¦ �� �� ¦ �� ��� ¦ � � ¦ �� � � ¦ ��<br />
Table 7-6. Tagg<strong>in</strong>g efficiencies ( ) with<strong>in</strong> each species for the comb<strong>in</strong>ed Ù�× + charm + tau Monte Carlo,<br />
on-resonance side-band (SB), and on-resonance fit region (FR) samples. The “MC truth” results come from a<br />
direct count of events <strong>in</strong> each category/species us<strong>in</strong>g truth <strong>in</strong>formation. Events <strong>in</strong> the “other” category conta<strong>in</strong><br />
tracks not associated with either a pion or kaon. The Run1+2side-band results (highlighted) are used <strong>in</strong> the<br />
f<strong>in</strong>al fit.<br />
confidence that the higher statistics side-band sample can be used to determ<strong>in</strong>e the background tagg<strong>in</strong>g<br />
efficiencies. We therefore use the results from the comb<strong>in</strong>ed Run 1 + 2 data <strong>in</strong> the maximum likelihood fit.<br />
7.5.2 Parameterization of ¡Ø<br />
Cont<strong>in</strong>uum ÕÕ events typically produce � � � � candidates by comb<strong>in</strong><strong>in</strong>g one high momentum track<br />
from each jet. The result<strong>in</strong>g background ¡Ø distribution Ê��� is not expected to have a significant lifetime<br />
ANALYSIS OF THE TIME-DEPENDENT �È -VIOLATING ASYMMETRY IN � � � � DECAYS