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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi, Pawel and Ilya,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Li demonstrated in his presentation on last Friday that the fluctuation in his extracted Compton cross section might be caused by MC simulation sample. I think
that it is very important. Would you please take a close look at his presentation? I would suggest to investigate the MC simulation as soon as possible.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Liping<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Primex2 [mailto:primex2-bounces@jlab.org]
<b>On Behalf Of </b>li ye<br>
<b>Sent:</b> Friday, February 12, 2016 3:03 PM<br>
<b>To:</b> Yang Zhang<br>
<b>Cc:</b> primex2@jlab.org<br>
<b>Subject:</b> Re: [Primex2] PrimEx-II analysis meeting reminder<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi powel , Ilia ,<o:p></o:p></p>
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<p class="MsoNormal">Please take a look the slides I have for todays meeting .<o:p></o:p></p>
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<p class="MsoNormal"> I use the Tfraction fitter to fit the data and get the cross section result, the fitting is much better ,<o:p></o:p></p>
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<p class="MsoNormal">but I still have some jump for the cross section , so I checked the calculation all over again and found a problem.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">in the simulation in my understanding ,the N-input for each Echannel should be like :<o:p></o:p></p>
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<p class="MsoNormal">cross-theory = Yield-mc / (const * flux * Acc ) where const is constant from target information , Acc is acceptance = Yield-mc / N-input ,<o:p></o:p></p>
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<p class="MsoNormal">so cross-theory = Yield-mc *(N-input/Yield-mc) /(const*flux)<o:p></o:p></p>
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<p class="MsoNormal"> cross-theory = N-input /(const*flux)<o:p></o:p></p>
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<p class="MsoNormal"> N-input = const*flux*cross-theory <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">means N-input should proportional to the cross-theory <o:p></o:p></p>
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<p class="MsoNormal">but if you check the last slides plot , the N-input number I got looks not right behavior . <o:p></o:p></p>
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<p class="MsoNormal">Please correct me if i am wrong .<o:p></o:p></p>
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<p class="MsoNormal">Yang , would you please also check the simulation input / flux for pi0 ? see if it is mach the theory shape ?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Cheers<o:p></o:p></p>
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<p class="MsoNormal">Li <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">2016-02-11 22:18 GMT-05:00 Yang Zhang <<a href="mailto:yzhang132@gmail.com" target="_blank">yzhang132@gmail.com</a>>:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Dear collaborators,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">We'll have our weekly meeting on February 12th, this Friday afternoon at 1:30pm in F227. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">please log onto <a href="https://jlab.bluejeans.com/2265619819/" target="_blank">https://jlab.bluejeans.com/2265619819/</a> to view the sharing. And Make sure your microphone and speaker are ok before entering
our meeting.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">You can also dial phone number <a href="tel:+1%20888-240-2560" target="_blank">+1 888-240-2560</a> to join the meeting with meeting ID <a href="tel:2265619819" target="_blank">2265619819</a>. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Meeting webpage:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><a href="http://wwwold.jlab.org/primex/weekly_meetings/primexII/slides_2016_02_12" target="_blank">http://wwwold.jlab.org/primex/weekly_meetings/primexII/slides_2016_02_12</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt">Directory for your presentation files: <o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">/group/primex/html/weekly_meetings/primexII/slides_2016_02_12<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Best<o:p></o:p></p>
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<p class="MsoNormal"><span class="hoenzb"><span style="color:#888888">Yang</span></span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
_______________________________________________<br>
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<a href="https://mailman.jlab.org/mailman/listinfo/primex2" target="_blank">https://mailman.jlab.org/mailman/listinfo/primex2</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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