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<div dir="ltr">Sorry all, I was in an extra long zoom meeting. Please keep me in the group for the exclusives case<span></span></div>
<div dir="ltr">Best</div>
<div dir="ltr">Simonetta </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Tensor <tensor-bounces@jlab.org> on behalf of Karl Slifer via Tensor <tensor@jlab.org><br>
<b>Sent:</b> Friday, August 2, 2024 9:19:43 PM<br>
<b>To:</b> tensor@jlab.org <tensor@jlab.org><br>
<b>Subject:</b> [Tensor] [EXTERNAL] zoom recording of Tensor Theory discussion</font>
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<p class="x_MsoNormal"><span style="font-size:10.5pt">Zoom Recording of today’s meeting:</span></p>
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<p class="x_MsoNormal"><span style="font-size:10.5pt"><a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__media.unh.edu_media_Tensor-2BGroup-2BMeeting-2B-2528Theory-2529-2BA-2BAugust-2B2-252C-2B2024.-2B-2B_1-5Fat70fs35&d=DwMGaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=mbL-4Mr65FbyCWqCw73luw&m=S35nHpYnEXhFOyjbP7amtb76azVcEA2LY7sxeEozBx_NWkzi1RJhw2WRpWrCsjv-&s=K-iHWW34FSaFRo5lPeMaJJI50H85cZ3iztKSciJL7L8&e=">https://media.unh.edu/media/Tensor+Group+Meeting+%28Theory%29+A+August+2%2C+2024.++/1_at70fs35</a></span></p>
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<p class="x_MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">Tensor <tensor-bounces@jlab.org> on behalf of Karl Slifer via Tensor <tensor@jlab.org><br>
<b>Date: </b>Friday, August 2, 2024 at 7:50</span><span style="font-family:"Arial",sans-serif; color:black"> </span><span style="color:black">AM<br>
<b>To: </b>tensor@jlab.org <tensor@jlab.org><br>
<b>Subject: </b>[Tensor] [EXTERNAL] Tensor Group Meeting today at 1:30 pm</span></p>
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<p class="x_MsoNormal" style="line-height:12.0pt; background:#FFEB9C"><b><span style="font-size:10.0pt; font-family:"Calibri",sans-serif; color:#9C6500">CAUTION:</span></b><span style="font-size:10.0pt; font-family:"Calibri",sans-serif; color:black"> This email
originated from outside of the University System. Do not click links or open attachments unless you recognize the sender and know the content is safe.
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<p class="x_MsoNormal"><span style="font-size:10.5pt; color:#212121">This is a reminder of the Tensor group meeting<span class="x_apple-converted-space"> Today August 2,</span> at 1:30pm<span class="x_apple-converted-space"> </span>(JLab time). <span style="background:white">This
will be a theory focused meeting moderated by Wim Cosyn. See details below.</span></span></p>
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<p class="x_MsoNormal"><span style="font-size:10.5pt; color:#212121">Minutes and zoom link are available here:</span></p>
<p class="x_MsoNormal"><span style="font-size:10.5pt; color:#212121"> </span></p>
<p class="x_MsoNormal"><span style="font-size:10.5pt; color:#212121"><a href="https://hallcweb.jlab.org/wiki/index.php/Tensor_Group_Meetings" title="Original URL:
https://hallcweb.jlab.org/wiki/index.php/Tensor_Group_Meetings
Click to follow link."><span style="font-size:11.0pt; color:#96607D">https://hallcweb.jlab.org/wiki/index.php/Tensor_Group_Meetings</span></a></span></p>
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<p class="x_MsoNormal"><i><span style="font-size:13.5pt; font-family:HelveticaNeue; color:#212121">Dear all,<br>
<br>
The UNH-led tensor group meetings on Fridays have<br>
requested a meeting focusing on notations & conventions with input from<br>
theorists.<br>
<br>
This is both within the context of the EPJA special issue and just in<br>
general going forward for purposes of better communication.<br>
<br>
The next regular planned meeting is<span class="x_apple-converted-space"> </span>Fri Aug 2, 1:30PM EDT. Would you be<br>
able to join? This is obviously not a convenient time for all time<br>
zones (and it is summer travel/vacation season) but any input is welcome<br>
over e-mail too.<br>
<br>
I will prepare a few slides for the meeting to get discussion going. It<br>
was my intention (and this is in progress) to write up an overview of<br>
different spin-1/tensor related notations and conventions throughout the<br>
literature for a contribution to the EPJA special issue. If there is<br>
some consensus of "preferred notations & conventions" that could be<br>
added to the overview document for the special issue which will be<br>
signed by all anyway I believe.<br>
<br>
While going through the literature, as always there are<br>
- different notations being used for the same thing<br>
- sometimes the same notation is used for different things.<br>
- cases where there is ambiguity when the normalization isn't clearly<br>
specified.<br>
<br>
So it could be beneficial to arrive at some agreed on notation &<br>
conventions.<br>
<br>
Variables in mind:<br>
- density matrix polarization parameters (theo/exp usage)<br>
- asymmetries<br>
- structure functions<br>
- distribution functions (collinear pdf, gpd, tmd).<br>
- ...?<br>
<br>
Especially for the polarization parameters there is quite a range of<br>
notations used, distribution functions on the other hand seem to be<br>
quite unified already (thanks to conventions from spin 1/2 for instance).<br>
<br>
Kind regards,<br>
Wim (w Nathaly & Karl)</span></i></p>
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