[Hps] [EXTERNAL] New opprotunities to explore the Dark Sector with positrons at JLab (Wed Jan 27 9:30-1200EST)

[Marco Battaglieri]

Dear all,
as you probably know, Jefferson Lab is considering to use CEBAF to 
accelerate an intense, polarized, high-energy beam of POSITRONS in the 
near future.
The opportunities of such a new facility were discussed within the 
community at JPOS17 conference  and summarized in a white paper posted 
here https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_pdf_2007.15081&d=DwIDaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=ErLkbYGWd8oSAZ70ywHxhA&m=iDBssCx-GzjPvRz-hBBpsNjTZU-QkEGwvlxuplcWoIM&s=d2xb7FN2KB3J_Dh8LrMM0yxqMK_dXIYEp80T2oJKU5M&e= .
A 10 GeV, ~uA ,highly polarized positron beam represents a great 
opportunity to explore the Dark Sector in a new and complementary way 
wrt the current fixed target electron and proton experiments.
We invited Enrico, Gordan and Luc to contribute to an extension of the 
white paper bringing new ideas to be the base for new experimental 
proposals to be presented to JLab PAC in the next year(s).
We set  a town meeting to present these new ideas and discuss them with 
the experimental communities (PADME, BDX, HPS, ...) that may be 
interested in be part of this new physcis program.
Yoiu all  are welcome to connect and participate to the discussion.

The (virtual) meeting will be on *Wednesday January 27 9:30AM-12:00PM 
EST (15:30-18:00 ITA/FR)* with the following Agenda:

- 9:30-9:45:           Brief presentation of the new positron facility 
at Jalb (Eric/Marco)
- 9:45-10:00:         Discussion on experimental aspects
- 10:00 - 10:30:     Luc/Enrico s presentation
- 10:30-11:00:       Gordan's presentation
- 11:00-12:00:       General discussion

Use this Zoom link to connect:
https://urldefense.proofpoint.com/v2/url?u=https-3A__cern.zoom.us_j_67041013509-3Fpwd-3DWnFWM0ZBbUlJcGtmbktwMFVvZzF4QT09&d=DwIDaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=ErLkbYGWd8oSAZ70ywHxhA&m=iDBssCx-GzjPvRz-hBBpsNjTZU-QkEGwvlxuplcWoIM&s=sLhgRX9iDdP9B2z_zrSRG0v6V0lvC0eqvpo_3OzQB5s&e= 

Please distribute this message to anybody in the field that may be 
interested (in particular to the PADME collaboration and other 
experimental colleagues)
Talk to you on Wednesday!
Cheers
Marco and Eric
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