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<p class="MsoNormal">Hi everyone,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sorry for spamming everyone’s inbox, but I forgot to include the rgc analysis on my last email. I uploaded my slides to page of last week’s meeting:
<a href="https://clasweb.jlab.org/wiki/index.php/RGC_Jun20">https://clasweb.jlab.org/wiki/index.php/RGC_Jun20</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The slides show my results from the updated analysis I had done, taking into account the additional cuts you all had recommended. As a quick summary, here are the additional cuts I had made:<o:p></o:p></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3">A cut on<!--[if gte msEquation 12]><m:oMath><i><span style='font-family:"Cambria Math",serif'><m:r>-</m:r><m:r>4</m:r><m:r>cm</m:r><m:r><</m:r></span></i><m:sSub><m:sSubPr><span style='font-family:"Cambria Math",serif;font-style:italic'><m:ctrlPr></m:ctrlPr></span></m:sSubPr><m:e><i><span style='font-family:"Cambria Math",serif'><m:r>V</m:r></span></i></m:e><m:sub><i><span style='font-family:"Cambria Math",serif'><m:r>z</m:r></span></i></m:sub></m:sSub><i><span style='font-family:"Cambria Math",serif'><m:r><1</m:r><m:r>cm</m:r></span></i></m:oMath><![endif]--><![if !msEquation]>
<span style="font-size:11.0pt;font-family:"Calibri",sans-serif;position:relative;top:2.5pt;mso-text-raise:-2.5pt;mso-fareast-language:EN-US">
<img width="116" height="17" style="width:1.2083in;height:.1805in" id="_x0000_i1025" src="cid:image003.png@01D9A822.32E2D060"></span><![endif]><o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3">A cut of all data points separated by more than 1.25 cm from the center of the target<o:p></o:p></li><li class="MsoListParagraph" style="margin-left:0in;mso-list:l0 level1 lfo3">Various cuts on the “distance of separation” (which I just labeled as<!--[if gte msEquation 12]><m:oMath><m:sSub><m:sSubPr><span style='font-family:"Cambria Math",serif;font-style:italic'><m:ctrlPr></m:ctrlPr></span></m:sSubPr><m:e><i><span style='font-family:"Cambria Math",serif'><m:r>S</m:r></span></i></m:e><m:sub><i><span style='font-family:"Cambria Math",serif'><m:r>v</m:r></span></i></m:sub></m:sSub></m:oMath><![endif]--><![if !msEquation]>
<span style="font-size:11.0pt;font-family:"Calibri",sans-serif;position:relative;top:2.5pt;mso-text-raise:-2.5pt;mso-fareast-language:EN-US">
<img width="14" height="17" style="width:.1458in;height:.1805in" id="_x0000_i1025" src="cid:image004.png@01D9A822.32E2D060"></span><![endif]>) between the reconstructed particle vertices<o:p></o:p></li></ol>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I also found the residual standard deviation for each of the fits. However, while changing the cuts on the distance of separation seemed to affect the calibration constants by 5-10%, the residual standard deviation for each one was practically
the same at 0.38cm. Given that the 2-sigma for the fits is around 0.75cm, would this detached vtx method be precise enough to be useful? My results certainly aren’t gospel, and I’d love to hear your feedback.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When I performed the fits, I didn’t include error bars on the individual vertex positions and just fit them as-is. Is that the correct approach? I just wasn’t sure if we were going to have the analysis meeting this week because of the JLUO
meeting.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sincerely,<o:p></o:p></p>
<p class="MsoNormal">Derek Holmberg<o:p></o:p></p>
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