[Halla_pi0] pi0 meeting 1:30 PM

[Aron Bernstein]

Dear Richard and all

   Enclosed is a preprint of our new Mainz electro-pi0 results which correct our old publication. 
You will see that the Q^2 dependence is much gentler than previously claimed. I think that this
resolves an old problem. We do not know exactly what went wrong with the previous data, but the Q^2 =0.10 GeV^2
point which was the Distler thesis, was the first experiment done at MAMI. The new calibrations and data analysis 
software have been well tested and are more reliable. The new data at Q^2 =0.05 GeV^2 is in good agreement with the
Weiss data. 

Clearly the new BigBite data will enlarge the kinematic coverage, most
importantly at high Q^2. The new Mainz results were obtained with an unpolarized electron beam so
the TL' results in Bigbite are an even larger addition to the previous data. 
The paper has been submitted to Physics Letters and posted on the web. 
Let me know if you have any questions. 

regards,
Aron

 
Aron M. Bernstein
Professor of Physics
MIT
Cambridge, MA. 02139
office: 26-419
phone: 617-253-2386



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On Oct 3, 2011, at 11:02 AM, richard lindgren wrote:

> Reminder meeting starts at 1:30 PM.
> 
>  We will meet at 1:30 PM for the pi0 data analysis meeting. At UVa we will meet in Room 120 as usual and in Doug's office for those of you at JLab.
> 
> Richard
> 
> Dr. Richard Lindgren
> Physics Department
> University of Virginia
> 
> 
> 
> 
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