First Year of BABAR/PEP-II - Harvard University Laboratory for ...
First Year of BABAR/PEP-II - Harvard University Laboratory for ...
First Year of BABAR/PEP-II - Harvard University Laboratory for ...
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Number <strong>of</strong> events/10 MeV<br />
DIRC Per<strong>for</strong>mance<br />
2500<br />
8000<br />
6000<br />
4000<br />
2000<br />
Number <strong>of</strong> events/10 MeV<br />
2000<br />
1500<br />
1000<br />
500<br />
<strong>BABAR</strong><br />
D 0 → K - π + D 0 → K - π +<br />
Without DIRC<br />
With DIRC<br />
0<br />
0<br />
1.6 1.8 2 1.6 1.8 2<br />
K - π + Mass (GeV) K - π + Mass (GeV)<br />
Efficiency ~ 80%, Rejection factor ~ 5<br />
<strong>First</strong> <strong>Year</strong> <strong>of</strong> BaBar/<strong>PEP</strong>-<strong>II</strong> Masahiro Morii SLAC
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