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<p style="margin-top:0;margin-bottom:0">Hi, Ashot,</p>
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<p style="margin-top:0;margin-bottom:0">I think that we need look at the accidental levels for both PS trigger and main trigger. PS contributes to the flux and main trigger contributes to the eta yield.</p>
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<p style="margin-top:0;margin-bottom:0">Liping</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Primexd <primexd-bounces@jlab.org> on behalf of gasparan@jlab.org <gasparan@jlab.org><br>
<b>Sent:</b> Monday, March 25, 2019 10:43:05 PM<br>
<b>To:</b> somov@jlab.org<br>
<b>Cc:</b> primexd@jlab.org<br>
<b>Subject:</b> Re: [Primexd] [Revised Logentry] Accidentals in tagger, Be target</font>
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Sasha,<br>
Though it may not be much different but, it would be better to use<br>
our experimental trigger instead of the PS trigger.<br>
<br>
Thanks,<br>
Ashot<br>
<br>
><br>
> Logentry Text:<br>
> --<br>
> Some quick (rough) estimates of the fraction of accidental hits in the<br>
> tagger (denoted as bg/sig in Fig. 2).<br>
><br>
> 1. Consider PS trigger. Search for hits in the tagger around the PS energy<br>
> in the window +- 1 GeV<br>
><br>
> 2. Count number of hits correlated with the trigger time (signal).<br>
> Determine accidentals<br>
> from the side band of the time distribution (see Fig. 1). Subtract<br>
> accidentals<br>
><br>
> 3. Fig. 2: fraction of accidental hits (in a +- 1 GeV energy window) in<br>
> the tagger as a function of the tagger energy<br>
><br>
> I'll check it later, just scratched the surface now.<br>
><br>
><br>
><br>
> ---<br>
><br>
> This is a plain text email for clients that cannot display HTML. The full<br>
> logentry can be found online at<br>
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