[Pwg] e+LOI announcement

[Marco Battaglieri]

Dear Eric,
as discussed at JLab a month ago, we would like to renew our interest in 
proposing an experimental  program that makes (good!) use of positron to 
search for light dark matter.
Beside what presented at JPOS17 we developed some new ideas that show 
how positrons can be used to increment the reach of dark photon and lDM 
particles in beam-dump like experiments.
How many pages you want form us about the 'Positrons for light Dark 
Matter searches' section?
Cheers
Marco, Andrea Luca


ERIC VOUTIER wrote:
>   Dear Colleagues,
>
>   Good news!  The proceedings of JPos17 have been submitted to AIP Publishing and will soon be
>   available for perpetual free on-line access for anyone.  In addition, a limited number of paper
>   copies will be printed and mailed to contributing presenters.
>
>   What’s next? As forecast, we would now like to begin the path of developing a White Paper on
>   Positron Physics at Jefferson Lab. It is a lengthy process, so we realistically intend to provide
>   this to lab management in early 2019.
>
>   To kick-start this effort, we are organizing to submit a collaborative Letter-of-Intent to PAC 46
>   (July 16-20, 2018) for a positron experimental program at CEBAF 12 GeV. We propose to gather in one
>   document several individual topics, each with persons of contact and dedicated to a specific experiment.
>   So far, we identify several classes of experiments: deeply virtual Compton scattering, two-photon exchange
>   related physics, beyond the Standard Model physics, and polarized target experiments. The individual
>   contributions may be proposed for experimental Halls A, B and C, utilizing existing detection capabilities
>   or new dedicated detectors when necessary. These proposals should consider using <100 nA polarized positron
>   beam currents and <10 µA unpolarized positron beam currents, as well as usual polarized electron beam currents.
>   We wish to gather all contributions by May 18, 2018 in order to prepare for the June 4 submission deadline to
>   PAC46.We will organize a group video-conference in mid-April to discuss the process.
>
>   In the meantime, please let us know if you would be interested in developing a LOI within this context and
>   what kind of experiment it would concern. We wish to assemble as strong a group as possible and coordinate/share
>   the effort among interested persons to make this combined LOI as compelling as possible.
>
>   Kind regards,
>
>   Eric & Joe
>
>   PS: if not already done, please subscribe to the Positron Working Mailing list pwg at jlab.org which will be used
>   for communication about these efforts.
>
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