[Tpe] new Gep paper

[Larry Weinstein]

I spoke to Guy Ron this morning about that.  He is not sure what the 
difference is between the JLab measurements and the Bates BLAST 
measurement, but he is pretty confident of the JLab measurement.  There 
are a few sources of uncertainty in those kinds of measurements.  The 
JLab measurement is a polarization transfer measurement, measuring the 
polarization of the outgoing proton [p(pol e, e' pol p)].  The Bates 
measurement is an internal polarized gas-jet target measuring [pol p(pol 
e, e' p)].

It is tough to know your target polarization precisely.

Guy can comment more if he wants.

Will Brooks wrote:
> Well, it's very good news for us if it turns out to be true, since we
> can clearly span their Q2 range and far beyond. The new measurement
> seems to be systematically different from previous analyses, beyond the
> uncertainties.
>
> http://arxiv.org/abs/1102.0318
>
>
> On 2/3/11 6:51 PM, Larry Weinstein wrote:
>    
>> Dear TPE Folks,
>>
>> There is a new paper from Hall A on the low Q2 Gep/Gmp ratio:
>> arxiv 1102.0318
>> Zhan et al
>>
>>      
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-- 
				Sincerely,
				Larry

-----------------------------------------------------------
Lawrence Weinstein
University Professor
Physics Department
Old Dominion University
Norfolk, VA 23529
757 683 5803
757 683 3038 (fax)
weinstein at odu.edu
http://www.lions.odu.edu/~lweinste/