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First Year of BABAR/PEP-II - Harvard University Laboratory for ...

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Resolution (cm)<br />

0.025<br />

0.02<br />

Tracks with p>1GeV/c<br />

DCH Per<strong>for</strong>mance<br />

<strong>BABAR</strong><br />

◆ He-iC 4 H 10 (80/20) <strong>for</strong> low multiple<br />

scattering<br />

◆ Single hit resolution in data (●)<br />

reached design: 2σ up to<br />

700 MeV/c → DIRC covers<br />

p > 500 MeV/c<br />

<strong>First</strong> <strong>Year</strong> <strong>of</strong> BaBar/<strong>PEP</strong>-<strong>II</strong> Masahiro Morii SLAC

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