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<p>I think I may have found the cause as to what is causing that dip in the 2.3 GeV Moller track energy after recon:</p>
<p>Not the generator. Pure geometric acceptance.<br>
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<p>Plots 1-2: 1.056 GeV MC is suspiciously free of dips after recon, and the hot ECal hits are all above the electron hole.</p>
<p>This is using the old generator by the way.<br>
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<p>Plots 3-4: These are only the Mollers which had that strange "gap" in layer 5 SVT hits (-9 to -13 mm). The final plot shows the gap.</p>
<p>Notice where they land on the ECal.</p>
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<p>So it seems that the corner of the electron hole happens to be where electrons with exactly half the beam energy go for 2.3 GeV...</p>
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<p>-Brad<br>
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