[d2n-analysis-talk] A1n in the Resonance Region

[Brad Sawatzky]

I'd want to run this by Wally and get his opinion on the validity of the
He3 -> neutron extraction for those data.  It is not clear to me how the
duality argument impacts that correction.  I'd want some theory support
before making that claim.

My recollection from our discussions with Wally et al. is that that the
effective polarization model is demonstrably invalid in the resonance,
and the strong recommendation was to use the iterative deconvolution
approach used for the unpolarized SF extraction in the Phys. Rev. C 79
(2009) 035205 paper.

-- Brad

On Wed, 19 Mar 2014, David Flay wrote:

> Hi all,
> 
> We have been thinking of including our resonance results for A1n in
> the A1 paper, where we assume duality (an observation claimed by two
> PRL papers for the proton and neutron spin structure functions at
> large Q^2) -- that is, we treat the average resonance data above the
> Delta as DIS data, and apply nuclear corrections in a consistent way.
> We have rebinned the 4- and 5-pass results into three equally-spaced
> bins in x, corresponding to x = 0.548, 0.648 and 0.748, and have
> averaged the results together, weighted by their statistical errors.
> See the attached plot.
> 
> This would be good to add to the A1 paper, as it would strengthen the
> physics of the paper; in particular, it would give some predictive
> power in the large x region ahead of the planned JLab 12 GeV
> measurements in Hall A and C.  Once 12 GeV data are available our
> duality assumption could be checked again.
> 
> What are your thoughts?
> 
> Best regards,
> 
> David

-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov