[Psqateic] PSQ at EIC White Paper

[Pawel Nadel-Turonski]

Dear Volker, All,

She time ago I expressed some worries about that some of the underlying assumption of this report did not correspond to reality, and as such there was a risk that it would do more harm than good. This latest version has not allayed my misgivings. I will provide detailed comments later, but my two main concern are the following.

1. The report repeatedly suggests that without an increase in luminosity at low energy the EIC will not be able to attain its stated physics goals. For instance, adding "in its low-to-medium center-of-mass energy implementation” to the discussion on lines 10-12 in the executive summary serves no other purpose than to cast doubt about the general capabilities of the EIC.

2. In the report it is often suggested that IP8 can be “optimized” to reach higher luminosity at low energy. However, the ONLY actual low-energy optimization that has been considered for IP8 is a configuration of the final-focus quads that would enable slightly stronger focusing at low energy. In addition to this, one can consider various global accelerator tradeoffs that may or may not enhance luminosity at low energy - but these have nothing to do with IR8 or a second detector, and would apply to both IRs/detectors.

What is unique about IR8 is a dramatic improvement in forward acceptance, which also improves rates for exclusive processes just as a higher luminosity does, but none of the simulations in the report have been done using realistic acceptances and thus the report has very little to say about this.

Best Regards,

Pawel


On Aug 3, 2022, at 10:33 AM, Volker Burkert <burkert at jlab.org<mailto:burkert at jlab.org>> wrote:

Dear Colleagues,



We are sending you this email because you have registered to participate in at least one of the workshops presented below, which were held on December 15-16, 2020, March 17-19, 2021, and July 19-23, 2021.

One of the main goals of these workshops was to develop a white paper focused on high-impact science requiring high integrated luminosity at the low-to-medium center-of-mass energy of the U.S. Electron-Ion Collider project.

This white paper is ready to be submitted for publication. As a participant in the workshop series, we invite you to become a co-author of this white paper, which can be found at this link: https://www.femtocenter.org/sites/default/files/docs/PSQ_EIC_White_Paper.pdf
Please visit this link and review the scope and content of the white paper. If you decide to co-author the WP, please send an email to burkert at jlab.org<mailto:burkert at jlab.org> no later than August 12.  You may also suggest minor changes to the text, acknowledgements, and references, or make comments that would improve the WP.

We have an agreement with a journal to publish the paper and we need to submit the final version by August 20.

With best regards,
Volker & Latifa



https://indico.bnl.gov/event/9794
https://indico.bnl.gov/event/10677
https://indico.bnl.gov/event/11669



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