[Clas_hadron] Baryons 2013 Talk for Stuart Fegan

[Ken Livingston]

Hi Stuart,

The slides look good. In reference to your talk from the Had Spec 
working group meeting - and only I'm allowed to say this - try to be a 
little less "Scottish" in the presentation. Maybe more Italian? Enthuse!
Just a couple of, quite important, suggestions.

On slide 19/20:
You should fix the error bars as discussed yesterday to show that actual 
limits in cos theta - even if you have to just gimp  the plots.
I'd say "Comparison with an preliminary data on an unpolarized proton 
target (g8b)". Don't say "older".
I'd also remove the blue points, and phrase about "adjacent energy 
settings". This is just confusing and the comparison looks better 
without it.

Slide 21. Again, fix the plots to get the "error bars" showing the 
actual range in cos theta.

In presentation of slide 21. Focus on the positive. Something like this.
"it's clear that there is a discrepancy in the results between the 2 
target settings. The most likely source of this is in the extraction of 
g, which is basically a small phase shift, using the binned fitting 
method. It is anticipated that using a moment analysis or event by event 
likelihood analysis will eliminate this problem.
"However, the error bars are relatively small and indicate that a 
reasonable, first measurement of G for this channel will be achievable 
from this data, and will make a valuable contributions to the 1st ever 
complete measurement in pseudoscalar meson prod."

Regards,
Ken



On 22/06/13 16:29, Stuart Fegan wrote:
> Hi Everyone,
>
> Sorry for the short notice, I was waiting until after my hadron
> spectroscopy talk yesterday before sending my Baryons slides, you will
> now find them on the g9 secure page;
> http://www.jlab.org/Hall-B/secure/g9/sfegan/SFegan_Baryons2013.pdf
>
> The talk will give an overview of my work towards measuring the G
> polarisation observable for the strangeness channels K Lambda and K
> Sigma, showing preliminary results for both the beam polarisation
> observable and G, one of the beam-target observables, for K Lambda.
>
> Unlike my aforementioned talk at the hadron spectroscopy meeting, my
> Baryons talk should be a lot clearer, as I will not be showing the
> original thesis results, whose comparison to my latest analysis was a
> central theme of my talk to the working group.
>
> Comments and/or suggestions are welcome.
>
> Cheers,
> Stuart
>


-- 
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Ken Livingston

Dept. of Physics & Astronomy,        Tel: +44 141 330 6428
University of Glasgow,               Fax: +44 141 330 5889
Glasgow G12 8QQ.
Scotland. UK.
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