[JLab 22 GeV] 22 GeV Frascati workshop summary

[Matt Shepherd]

Dear Colleagues,

We would like to keep you up to date on progress towards developing the scientific case for the 22 GeV upgrade following the successful workshop in Frascati in December.  Together with the conveners of the working groups, we aim to prepare a short summary of the workshop.  Given that we have recently published a lengthy white paper, we want to avoid duplicating this effort.  Our goal is to prepare a document that does these things:

1. capture the changes, refinements, and improvements of motivation, theoretical and experimental studies, since the white paper;
2. set milestones for critical-path theoretical or experimental studies so we can assess progress towards these goals at the next 22 GeV workshop; and
3. summarize, where possible, the anticipated global landscape 10-15 years from now, when the 22 GeV upgrade might begin producing results.

We have distributed a writing outline focused on these topics to the working group conveners and asked them to prepare at most 3-5 pages of text.  They may be in touch with some of you in the coming weeks.  We would like to have the summaries from the conveners before the end of April, so that a final document is ready at the start of summer.

As previously mentioned, a group that has representation from theory, experiment, accelerator, the user community, and management continues to meet on a monthly basis to discuss the strategy for both the positron and 22 GeV initiatives.  An action item for this group is to discuss the optimal way to continue to develop the scientific case through discussions and workshops.  The user representatives in this group are John Arrington, Axel Schmidt, and myself (MS).  All of us would welcome input from the community.

For the energy upgrade, the tentative goal is to again bring together the members of community that are developing the science case for another workshop in spring or summer of 2026.  We want to sustain the momentum and activity but realize also that many of you need time to work on 22 GeV related studies in parallel with publishing 12 GeV research, which must have priority.  Therefore, we will take a little time to define the optimal strategy for restarting the “Open Discussion” series again in preparation for the next workshop, if not sooner.

We would like to thank you again for your contributions the recent workshop and the lead-up biweekly discussions.  We look forward to continuing to build the strongest possible scientific case for a 22 GeV upgrade to CEBAF.

Patrizia and Matt

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Matthew Shepherd, Professor
Department of Physics, Indiana University, Swain West 265
727 East Third Street, Bloomington, IN 47405

Office Phone:  +1 812 856 5808

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