[Olympus] [EXTERNAL] Re: Yield paper

[Michael Kohl]

Dear Axel and Jan,

thank you for sending the revised version right on time when I was about 
to start reviewing the draft.

This is an excellent and important result, and a very well written paper.

I provided all my comments in the attached PDF-edited version.

My main point is this: Despite uncertainties of TPE prescriptions used in 
world data fits, the world data precision at the lowest Q2 point is still
smaller than the 7.5% normalization uncertainty of the OLYMPUS data.
This would suggest to move all data points down by ~2%, by using the 
available normalization via world data that is most precise.

The power of this OLYMPUS data set would then be the Q2 evolution itself, 
and the absence of the cusp effect as seen in Jan's fit. Since the 
normalization uncertainty is 7.5% the data can not distingish between 
curves except between their shapes, and the curves are all pretty close to 
each other at the lowest Q2 point, by much less than 7.5%.

Again, congrats on completing a very hard and tough piece of work!

Best regards,
   Michael




On Sat, 11 Jul 2020, Axel Schmidt wrote:

> Dear Colleagues,
> 	Thank you to the many of you have already reviewed the manuscript and sent comments. Your suggestions were excellent and we've implemented them all in the latest draft, attached below. If you haven't read the paper yet, go ahead and start with this version.
>
> If you have any other suggestions, comments, concerns, complaints, please send them to me by July 16th.
>
> Best regards,
> Axel
>
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>> On Jul 8, 2020, at 15:05 , Douglas K Hasell <hasell at mit.edu> wrote:
>>
>> Dear Colleagues,
>>
>> 	Last week Axel sent out a draft of the new charge-averaged yield paper based on the OLYMPUS data.  He requested that the collaboration read it, send comments, and approve it by 16 July, 2020, which is now just a week away.  Please respond soon as we aim to post it to the arXiv and then submit to PRL soon afterwards.  If we do not hear any reply we will assume you approve the paper as is.
>>
>> 	I have attached draft again.
>>
>>                                                      Cheers,
>>                                                              Douglas
>>
>> 26-415 M.I.T.                                  Tel: +1 (617) 258-7199
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>>
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+---------------------------------------------------------------------
Dr. Michael Kohl, Professor and Staff Research Scientist
Physics Department, Hampton University, Hampton, VA 23668
Jefferson Lab, C117, 12000 Jefferson Avenue, Newport News, VA 23606
Phone: +1-757-727-5153 (HU office), +1-757-256-5122 (Cell)
Email: kohlm at jlab.org
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