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Dear all,

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<div class="">here I added some plots for the N pho studies: <a href="https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.dropbox.com%2Fs%2Fagtynfz2e7emmz5%2FDIRC_weekly_Mar5a.pdf%3Fdl%3D0&data=02%7C01%7Challd-pid-upgrade%40jlab.org%7C13a34a4984ef4bcc2a1608d6a27f6fcc%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C1%7C636875065564465514&sdata=%2BfGcb%2BDKxZzqADamMEbfuKGnkoMvwlbjupYrdRMCqCo%3D&reserved=0" originalSrc="https://www.dropbox.com/s/agtynfz2e7emmz5/DIRC_weekly_Mar5a.pdf?dl=0" shash="qGAqp0MLVDX0GuedrJiZ0uc36aDypmG5uDKBOVpKe7bDIVIInzOntcLlNqNqHiZtVEKOzr3YvVpCTD5hlTbmd0fwXwxPhhybOmPTBJMYEBBFEeLQkVZp4sDCIlmnc6f2ZKcdQx8pngyncNnC14bnllptg7kIKKwTBq2AYugI7tw=" class="">https://www.dropbox.com/s/agtynfz2e7emmz5/DIRC_weekly_Mar5a.pdf?dl=0</a></div>

<div class="">It seems that :</div>

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<div class="">1. On average the Npho/track does not depend on the sign of the charge, but closer to the side, the difference start to be visible</div>

<div class="">2. loose time cut [10; 120] ns seems to cut out a lot of noise from the data, although it does not affect the simulation</div>

<div class="">3. for bggen sample the N pho / track seem to have double peak structure, where the second peak might come from secondaries. There is no double peak structure in the data</div>

<div class="">4. Still strange that N pho / event does not grow with the number of tracks hit the DIRC bottom half (data and sim agree here).</div>

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<div class="">Best regards,</div>

<div class="">Maria</div>

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