[Primex2] APS April Meeting slides Compton

[li ye]

Hi Liping,
1. done
2. done
3. the definition on slide 7 and 8 for Delta K are the same .
4. done.
5. done. see if it is OK I also text the Gaussian fit value
6. done. if it is not good enough please let me know .
7. 4.84 is the weighted average energy value , = Sum [ energy(i)*yield(i) ]
/ total yield , where i  is the energy bin number
8. done, I dont know if 2% is OK , maybe change to 1.5% ?
Please let me know if there is any other comments
Thank you for presenting this for me .
Li



On Tue, Apr 10, 2018 at 2:09 PM, Gan, Liping <ganl at uncw.edu> wrote:

> Hi, Li,
>
>
>
> Here are my a few comments:
>
>
>
> 1.      For the title on the  first slide, “electron” should be removed.
>
> 2.      The slide 3, my suggestion for your first sentence is “Electron
> Compton scattering is one of the most fundamental and the best
> theoretically known reaction in QED”. The reference for the higher order
> corrections should be L. M. Brown and R. P. Feynman, Phys. Rev. 85, 231
> (1952).
>
> 3.      Both histograms on the slide 7  and 8 are for Δk. You applied cut
> for Δk on slide 7 while you extracted yield from Δk on slide 8.  Can you
> tell me if the definitions of those Δk are the same? If not, please clearly
> define and distinguish them.
>
> 4.      For those yield extraction figures on slide 8 & 9, it is hard to
> see how good the fitting are.  Can you plot them in log scale?
>
> 5.      For the “Experiment/Theory Deviation” slide  (the second slide
> 10), it is better for you to project  those data points to the y-axis and
> show the mean value and RMS of the distributions.
>
> 6.      On slide 11, would you use red arrows to indicate where your
> actual cuts are? Your text font on the figures are too small to see. Can
> you make them larger?
>
> 7.      On slide 13, the column #2 shows that energy is 4.84 GeV. Does it
> correspond to one of your energy bin? What do you mean by “integrated cross
> section”? Do you mean that you integrated the total phase space or  the
> energy range of the measurement?
>
> 8.      On slide  14, you need make statement. For example, you can say
> “The Compton cross sections for the energy range of 4.4-5.3 GeV were
> measured with precision of …   for the first time”, “The Compton results
> validated that the systematic uncertainties of the PrimEx-II experiment for
> the pi0 lifetime measurement were controlled at the level of  ***%”.
>
>
>
> I would appreciate if you could send out your updated version as soon as
> possible.
>
>
>
> Liping
>
>
>
>
>
>
>
>
>
> *From:* li ye [mailto:yeli.ciae at gmail.com]
> *Sent:* Saturday, April 07, 2018 1:48 PM
> *To:* primex2 <primex2 at jlab.org>; Ashot Gasparian <gasparan at jlab.org>;
> pawel <pawel at jlab.org>; Gan, Liping <ganl at uncw.edu>; Ilia Larin <
> ilarin at jlab.org>; Dipangkar Dutta <ddutta07 at gmail.com>
> *Subject:* APS April Meeting slides Compton
>
>
>
> Hi All,
>
> Here is the slides for APS meeting, please send me your comments.
>
> Thanks
>
> Li
>
>
>
> --
>
> Li Ye
>
> Mississippi State University
>
> 757-291-9896
>



-- 
Li Ye
Mississippi State University
757-291-9896
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