<div dir="ltr"><div>Dear All,<br></div> Please find attached a set of beta v. momentum plots for gamma p -> p pip pim reactions using the newly cooked data (cooked_048483.A01.B02, the same file Mike used). The plot on the left is the beta v. momentum distribution for all final state particles (p, pip and pim) with no (notable) cuts; I only require a proton, pi+, pi- in the final state using the GPID bank. The plot on the left is the same plot after all of my cuts (ngrf, tagrid, angle, momentum, vertex, and confidence level).<br>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Jun 21, 2013 at 1:31 PM, Michael Dugger <<a href="mailto:dugger@jlab.org">dugger@jlab.org</a>> wrote:<br>
<blockquote class="gmail_quote"><br>
Hi,<br>
<br>
I was looking at some newly cooked data and am getting results for beta<br>
vs. momentum that look strange.<br>
<br>
The plot for the newly cooked data -><br>
<a href="http://www.jlab.org/Hall-B/secure/g8b/ASU/tmp/NewBetaVsP.gif">http://www.jlab.org/Hall-B/secure/g8b/ASU/tmp/NewBetaVsP.gif</a><br>
<br>
A plot of the previous version of cooked data -><br>
<a href="http://www.jlab.org/Hall-B/secure/g8b/ASU/tmp/OldBetaVsP.gif">http://www.jlab.org/Hall-B/secure/g8b/ASU/tmp/OldBetaVsP.gif</a><br>
<br>
The plots are from PERP, 1.5 GeV, run 48483. The new plot only contains<br>
events from file A01.B02, while the plot of the previous cook has all A01<br>
files.<br>
<br>
The resolution looks much better, but we now have and extra stripe below<br>
the proton, and the stripe below the pions is crossing the kaons more<br>
heavily.<br>
<br>
Is anyone else seeing this sort of behavior?<br>
<br>
Take care,<br>
Michael<br>
<br>
_______________________________________________<br>
G8b_run mailing list<br>
<a href="mailto:G8b_run@jlab.org">G8b_run@jlab.org</a><br>
<a href="https://mailman.jlab.org/mailman/listinfo/g8b_run">https://mailman.jlab.org/mailman/listinfo/g8b_run</a><br>
</blockquote></div><br><br clear="all"><br>-- <br>Cheers,<br>Charles Hanretty<br>
</div>