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Hi Pierre,</div>
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<br>
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<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
are these 52 runs are all "Good" runs that you use in the analysis, or you have runs that are not it the "Good runs" list?</div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" class="elementToProof">
I am wondering why few runs don't show big improvements, e.g. 1<span><sup>st</sup> two runs, or the last run (on your last slide).</span></div>
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<span><br>
</span></div>
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<span>Also the improvement of the width seems to me to be real to me, as in your third slide</span></div>
<div style="" class="elementToProof"><font face="Calibri, Arial, Helvetica, sans-serif" style="color: rgb(0, 0, 0);"><span style="font-size: 12pt;">the bottom bar of ratio plots shows a bump at the mass of J/psi,
</span>otherwise<span style="font-size: 12pt;"> I would just expect the ratio to increase uniformly</span></font></div>
<div style="" class="elementToProof"><font face="Calibri, Arial, Helvetica, sans-serif" style="color: rgb(0, 0, 0);"><span style="font-size: 12pt;">over all the mass range.</span></font></div>
<div style="" class="elementToProof"><font face="Calibri, Arial, Helvetica, sans-serif" style="color: rgb(0, 0, 0);"><span style="font-size: 12pt;"><br>
</span></font></div>
<div style="" class="elementToProof"><font face="Calibri, Arial, Helvetica, sans-serif" style="color: rgb(0, 0, 0);"><span style="font-size: 12pt;">Rafo</span></font></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Clas12_dileptons <clas12_dileptons-bounces@jlab.org> on behalf of Pierre Chatagnon via Clas12_dileptons <clas12_dileptons@jlab.org><br>
<b>Sent:</b> Wednesday, July 5, 2023 12:21 PM<br>
<b>To:</b> Richard Tyson (PGR) <r.tyson.1@research.gla.ac.uk>; Clas12_dileptons@jlab.org <clas12_dileptons@jlab.org><br>
<b>Subject:</b> Re: [Clas12_dileptons] Pass 2 Improvements</font>
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<p class="x_MsoNormal">Hello all,</p>
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<p class="x_MsoNormal">Similarly to what Richard shown, I ran my code on the currently available pass2 data for RGA (52 runs of Spring 2019 out of 121). Some of the figures I have produced are in the slides attached that I am planning to sent to Timothy to
include in his presentation at the collaboration next week.</p>
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<p class="x_MsoNormal">There is a great improvement in the number of Jpsi, close to 86% (a very similar number to what Richard mentioned). The width seems better too (though it needs full statistics to really give a good conclusion on this point).</p>
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<p class="x_MsoNormal">Please let me know if you have any questions/comments. Otherwise I plan to send these plots to Timothy by tomorrow</p>
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<p class="x_MsoNormal">Best</p>
<p class="x_MsoNormal">Pierre</p>
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<p class="x_MsoNormal" style="border:none; padding:0in"><b>From: </b><a href="mailto:clas12_dileptons@jlab.org">Richard Tyson (PGR) via Clas12_dileptons</a><br>
<b>Sent: </b>Monday, July 3, 2023 8:37 AM<br>
<b>To: </b><a href="mailto:clas12_dileptons@jlab.org">Clas12_dileptons@jlab.org</a><br>
<b>Subject: </b>[Clas12_dileptons] [EXTERNAL] Pass 2 Improvements</p>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">Hi All,</span></p>
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As you may know pass 2 has been completed for the RG-B spring2019 dataset. Unfortunately, we had some power outages due to flooding in our offices in Glasgow so I was only able to transfer over roughly 60% of spring 2019. On these 60% of spring2019 we see an
improvement of:</span></p>
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<li class="x_MsoNormal" style="color:black"><span style="font-size:12.0pt">~80% for J/psi produced on the proton ( ep_bound -> (e') e+ e- p ).</span></li><li class="x_MsoNormal" style="color:black"><span class="x_contentpasted0"><span style="font-size:12.0pt">~50% for J/psi produced on the neutron ( en_bound -> (e') e+ e- n ).</span></span><span style="font-size:12.0pt"></span></li></ul>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; color:black">I've attached some slides related showing the pass1/pass2 comparison. I'm going on holidays tomorrow so I won't be able to attend the next couple of meetings but please let me know by email
if you have any questions. I think Silvia is intending to give an update at the collaboration meeting about pass 2 improvements in RG-B and I was also going to send her these slides.<br>
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Cheers,<br>
Richard</span></p>
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