[Clas_hadron] APS slides

[burkert]

Hi Natalie,

You have a nice talk. Although the slides are "extremely similar" to 
your earlier slides, I have a few (minor) comments:
slide 2: Results => Preliminary results

slide 3: bullet 4: Energy around 1900 MeV => Mass range around 1900 MeV

slide 4: Upper graph is a disgrace, please look for a better quality one 
(if you can't find it on your own let me know)

slide 5: Move bullet #4 in place of bullet #2 and change the sentence 
to: "Cross section data are not sufficient, polarization observables are 
required for accessing the amplitudes."
Change current bullet #2 to read: "Polarization observables are 
combinations of 16 bilinear products of amplitudes. They can be measured 
with target, beam, and recoil polarization.

slide 11: Why do you cut kaons and protons at 400 MeV/c? That seems 
rather high.

slide 12: The upper left graph shows teh missing mass of K+p. However it 
looks strange because what you really calculate is the (missing mass)^2 
and then you talk the sqrt of that number. Since many event have a 
negative mm^2 you assign a negative mm value when mm^2 <0. That creates 
an artificial node point at mm=0. Instead you should plot MM^2.

slide 13: If possible change the vertical scale to range from -0.6 -> 
+0.2 to better show the data quality. The Kaon Maid curves are outdated 
and cannot be trusted. I would eliminate them.

slide 14: same comment as for slide 13 (vertical scale and Kaon-Maid).

All the best,
Volker

On 4/11/13 10:31 AM, natalie at jlab.org wrote:
> Hi,
> I will be making a very short presentation at APS this weekend. The slides
> are extremely similar to what I showed at the last collaboration meeting
> in February and have already incorporated some changes by the FROST group.
> If you have any comments or suggestions, please let me know.
>
> http://www.jlab.org/Hall-B/secure/g9/natalie/apsmtg.pdf
>
> Thanks,
> Natalie
>
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