<div dir="ltr">Dear Annalisa<div><br></div><div>Thank you for the suggestion</div><div><br></div><div>I updated my slides with plots showing the generated events with the condition that both photons were below 35 degrees</div><div>There are 60.8k such events, out of 500k generated total</div><div><br></div><div><a href="https://clas12-docdb.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=637">https://clas12-docdb.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=637</a><br></div><div><br></div><div>Best regards</div><div>FX</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Apr 27, 2020 at 5:19 PM Annalisa D'Angelo <<a href="mailto:annalisa.dangelo@roma2.infn.it" target="_blank">annalisa.dangelo@roma2.infn.it</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<div>Great Job FX!</div>
<div><br>
</div>
<div>do you have and estimate of the
fraction of simulated events for which both photons are emitted at
angles lower than 35 degrees in the laboratory frame?</div>
<div>How does it compare with your final
number of 15 K reconstructed events and 10K of clean exclusive
events?</div>
<div><br>
</div>
<div>All the best</div>
<div>Annalisa<br>
</div>
<div>Il 26/04/20 23:06, Francois-Xavier
Girod ha scritto:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Dear all
<div><br>
</div>
<div>As a follow up from Friday's meeting, Anna agreed to
provide me with her eppi0 simulation files so I can take a
look with my code</div>
<div><br>
</div>
<div>I posted some slides summarizing my findings on the docDB
page here</div>
<div><a href="https://clas12-docdb.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=637" target="_blank">https://clas12-docdb.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=637</a></div>
<div><br>
</div>
<div>I think that most of the background Anna observed comes
from photons generated by the electron bremsstrahlung</div>
<div>One can mostly remove all this background with a simple cut
on the angle between electron and photon > 7 degrees</div>
<div>The generated kinematics indicates that such a cut should
be fine</div>
<div><br>
</div>
<div>In addition I applied a set of exclusivity cuts similar to
what I used for the deep pi0 selection</div>
<div>Note that the values of these cuts should be adjusted for
the analysis of the data, but overall I expect they would help
clean up the backgrounds from other reactions as well</div>
<div><br>
</div>
<div>In general it seems prudent to remove photons around the
electron direction, unless one is directly interested
in bremsstrahlung events</div>
<div><br>
</div>
<div>Best regards</div>
<div>FX</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, Apr 23, 2020 at 7:52
PM Annalisa D'Angelo <<a href="mailto:annalisa.dangelo@roma2.infn.it" target="_blank">annalisa.dangelo@roma2.infn.it</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p><span style="background-color:rgba(255,255,255,0)">Dear
All,<br>
<br>
this is a reminder of tomorrow RGK meeting <a dir="ltr">at 8:00 am</a> Jlab time.<br>
<br>
The bluejeans link is:<br>
<br>
<a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab.bluejeans.com_214576976&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=t2OnxVoP8YJyzuxpHKwj1tmrMj6s1mZ4pgV16sZJZb8&m=Xv8He5Zu2WrGWdLaLCq_bbPgPtJyiHCbvGjBnZJp-3w&s=D1duBcnVCXxtVPUS7bfmvQQ1grPEM014tffjotoLbFw&e=" dir="ltr" target="_blank">https://jlab.bluejeans.com/214576976</a><br>
</span></p>
<p><span style="background-color:rgba(255,255,255,0)"><br>
</span></p>
<span style="background-color:rgba(255,255,255,0)">All the
best<br>
<br>
Volker and Annalisa</span>
<pre cols="72">--
================================================
Prof. Annalisa D'Angelo
Dip. Fisica, Universita' di Roma "Tor Vergata"
Istituto Nazionale di Fisica Nucleare
Sezione di Roma Tor Vergata, Rome Italy
<a href="mailto:email:annalisa.dangelo@roma2.infn.it" target="_blank">email:annalisa.dangelo@roma2.infn.it</a>
Jefferson Laboratory, Newport News, VA USA
Email: <a href="mailto:annalisa@jlab.org" target="_blank">annalisa@jlab.org</a>
Tel: + 39 06 72594562
</pre>
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<pre cols="72">--
================================================
Prof. Annalisa D'Angelo
Dip. Fisica, Universita' di Roma "Tor Vergata"
Istituto Nazionale di Fisica Nucleare
Sezione di Roma Tor Vergata, Rome Italy
<a href="mailto:email:annalisa.dangelo@roma2.infn.it" target="_blank">email:annalisa.dangelo@roma2.infn.it</a>
Jefferson Laboratory, Newport News, VA USA
Email: <a href="mailto:annalisa@jlab.org" target="_blank">annalisa@jlab.org</a>
Tel: + 39 06 72594562
</pre>
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