Dear Tulio,
This is a great contribution and long expected in the collaboration.
The result is supporting our expectation that those phase angles
should be kept the same (or come out the same) for fitting of C12
and Pb208.
Thank you,
Ashot
.............................................................
Ashot Gasparian Phone:(336)285-2112 (NC A&T)
Associate Professor
Physics Department (757)-269-7914 JLab
NC A&T State University Fax:(757)-269-6273 JLab
Greensboro, NC 27411 email: gasparan@jlab.org
.............................................................
On Tue, 18 Nov 2008, tulio@if.usp.br wrote:
> Dear PrimEx colleagues,
> I have made a preliminary study about the phase-shift angle between the Coulomb
> and Nuclear Coherent amplitudes for pi0 photoproduction on Carbon and Lead. The
> results include FSI and accommodate the PrimEx kinematics. The bottom line is
> that the Carbon and Lead phase-shifts are consistent with each other within
> approximately 5 %, suggesting the idea of performing a simultaneous fitting for
> a single phase-shift parameter!
>
> The slides can be found at:
> http://fep.if.usp.br/~tulio/PrimEx/phase_shift/phase_shift.pdf
>
> I believe that the collaboration effort is concentrated on the PAC 34 proposal
> up to the middle of December, but I appreciate the feedback whenever the pi0
> analysis is resumed.
> Due to conflicts, I will no be able to access our weekly meeting up to the next
> month, but I will be happy to discuss this important issue on the web.
> Regards,
> -Tulio.
>
>
>
>
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