[G14_run] Ad Hoc committee comments and replies for K0Y0 paper

[Dr. A.M. Sandorfi]

Hi Reinhard,

Let me suggest the following response to the committee¹s comment about
showing PWA predictions as bands:

     There are a variety of ways to show that there is some spread inherent
to PWA predictions that changes with kinematics. The PWA curves in the
figures are from Energy-Dependent (ED) PWA. In the case of SAID, these are
smooth parameterizations of a set of Energy-Independent (EI) solutions. The
latter are made by binning the world's data in W and assigning all
measurements within a particular bin to the centroid energy of that bin,
even though all of those data were not taken at exactly the same energy. So
there is an inherent fuzziness in this PWA process. (BnGa does the reverse:
they fit parameters of an ED PWA, and then evaluate consistency by comparing
with an EI solution, constructed in the same way as SAID.) It is this
fuzziness that is indicated by PWA bands evaluated for the W limits of each
bin. (This uncertainty does not reflect that fact that the amplitude is
still underdetermined, due to an insufficient number of observables. That
can still be large but is quite difficult to evaluate.)
     To help alleviate concerns over misinterpretation of the PWA bands, we
have added the following two sentences (somewhere near the end of the first
paragraph of section IV),
  ³PWA combine results from many experiments at different energies, and this
results in varying degrees of sensitivity to energy and angle. This is
illustrated in figure 7 by the SAID and BnGa PWA predictions at the limits
of the energy bins.²

Then, in the 3rd line of the caption to figure 7, I would change ³bands²
(used there to refer to the W range) to ³bins²; ie. use ³bins² for energy
and ³bands² for PWA, to keep it all straight.

I would think that should do it.
Andy






On 4/5/18, 4:44 PM, "Reinhard Schumacher" <schumacher at cmu.edu> wrote:

> Hello g14ers,
> 
> We have received our comments for the K0Y0 paper from the committee consisting
> of Bill Briscoe, Marco Mirazita, and Gabriel Niculescu.
> Attached to this message are two documents:
> 
> 1) Their comments with my (our) replies embedded.
> 
> 2) A revised draft of the paper that implements (almost) all of the suggested
> changes made by the committee.
> If possible, please have a look at the two documents prior to our meeting on
> Friday.   I am hoping to send these documents (subject to your approval) back
> to the Ad Hoc committee for their approval.
> 
> Reinhard
> 
> _____________________________________________________________
> Reinhard Schumacher         Department of Physics, 5000 Forbes Ave.
> Carnegie Mellon University, Pittsburgh, PA 15213, U.S.A.
> phone: 412-268-5177           web: www-meg.phys.cmu.edu/~schumach
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