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<p class="elementToProof" style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">Dear all,</span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">Starting from the summer 2022 a series of workshops has been held to develop the scientific case for a 22 GeV upgrade to CEBAF made possible
by recent novel advances in accelerator technology. CEBAF’s envisioned capabilities, at the highest luminosities, will enable exciting opportunities that give scientists the full suite of tools necessary to comprehensively understand how QCD forges hadronic
matter in the valence regime. Following the workshops, a white paper, with an initial scientific case, has been written (</span><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">e-Print:
</span><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: rgb(0, 80, 179);"><u><a href="https://arxiv.org/abs/2306.09360" target="_blank" id="OWAc053f3d0-edae-9ce1-aeb9-0e97d633da28" class="OWAAutoLink" style="color: rgb(0, 80, 179); margin-top: 0px; margin-bottom: 0px;">2306.09360</a></u></span><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> [nucl-ex])
</span><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">and it has been accepted for publication by EPJA.</span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">As we wrap up final publication of it, we want to start on the next steps of the process of developing the 22 GeV physics program. Our white
paper contains a snapshot of many possible opportunities, and it is important to keep developing, refining, and sharpening the physics arguments. As part of the upgrade effort, we plan to organize a biweekly 22 GeV physics discussion. Through these meetings,
Jefferson Lab and its user community will continue to build the science case with descriptions and concrete projections for experiments that would become possible with an upgrade. </span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">We envision allocating one hour every other week that could be used for 2-3 short presentations and discussion on key topics we can address
with the 22 GeV upgrade. These may be featured in the white paper or even new things that have come up. We may organize presentations around a theme or a set of measurements or ask if someone can explain a key plot in the white paper. For this to be most
productive, we need a healthy discussion of some common questions:</span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;"> </span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">* Why do we care? (What fundamental property of nature are we exploring? What hypothesis are we testing?)</span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">* What is being measured and how precisely can it be measured?</span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">* Why are 22 GeV electrons necessary to make the measurement?</span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;"> </span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">The meetings will be in hybrid format to allow a large participation. We have reserved room at
<b>CEBAF Center</b> <b>F224/5 for 12:30 - 1:30 PM every other Monday starting on Monday June 17</b>. For the remote connection please use
</span><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: blue;"><u><a href="https://jlab-org.zoomgov.com/j/1611118017?pwd=YkZsT2d1VDV5TjU2OENxR0dvY25xZz09" id="OWA1ec9c14b-d79f-1e54-f4a1-38020e57ee3b" class="OWAAutoLink" style="color: blue; margin-top: 0px; margin-bottom: 0px;">Zoom
meeting number 161 111 8017 (password: 22)</a></u></span><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">.</span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;"> </span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">Looking forward to seeing many of you!</span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;"> </span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">David Dean – Deputy Director for Science<br>
Cynthia Keppel – Associate Director Physics Division<br>
Patrizia Rossi – Deputy Associate Director Physics Division</span></p>
<p style="margin: 0in 0in 0.0001pt;"><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black;">Matt Shepherd –
</span><span style="font-family: "Calibri", sans-serif; font-size: 12pt; color: black; background-color: white;">Chair-Elect, JLUO Board of Directors</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><br>
</span></p>
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