[Primexd] No PrimEx Meeting Today

[gasparan]

   Thanks Drew for the update and a good information.
  Ashot


On 2025-08-29 06:48, Drew Smith via Primexd wrote:
> Dear All,
> 
>  I unfortunately will not be able to attend the PrimEx meeting today,
> and would suggest we cancel it. Of course the zoom meeting is always
> open, so feel free to join and discuss things without me.
> 
>  A couple of brief updates:
> 
>  	*
> Alex Gnech and Lorenzo Andreoli (local theorists at JLab and ODU) have
> produced some calculations of the coherent photoproduction process
> from Helium 4 (including both Primakoff and strong interaction), and
> they agreed to attend a meeting sometime next month to discuss it as
> well as fitting strategies. It will likely be towards the end of the
> month, but we will coordinate that offline.
> 	*
> Igal and I have made some progress towards understanding the
> calibration mismatch between data and MC, as well as the shift (and
> slight distortion) of the energy constrained invariant mass
> distribution due to photoproduction off of bounded nucleons
> (incoherent production). Igal has determined a suitable course of
> action to correct this mismatch. I can give a better update at next
> week's meeting and show how we can estimate associated systematic
> uncertainty on the yield extraction.
> 
>  Apologies for the last minute cancelation, but I think we will have
> plenty to discuss next week.
> 
>  Best Regards,
>  Drew
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