[G8b_run] Newly cooked data

[Michael Dugger]

Charles,

It looks like, after your cuts, you are left with about 19% of the 
original events. How does that compare with the previously cooked data?

Take care,
Michael


On Mon, 24 Jun 2013, Charles Hanretty wrote:

> Dear All,
>      Please find attached a set of beta v. momentum plots for gamma p -> p
> pip pim reactions using the newly cooked data (cooked_048483.A01.B02, the
> same file Mike used). The plot on the left is the beta v. momentum
> distribution for all final state particles (p, pip and pim) with no
> (notable) cuts; I only require a proton, pi+, pi- in the final state using
> the GPID bank. The plot on the left is the same plot after all of my cuts
> (ngrf, tagrid, angle, momentum, vertex, and confidence level).
>
>
> On Fri, Jun 21, 2013 at 1:31 PM, Michael Dugger <dugger at jlab.org> wrote:
>
>>
>> Hi,
>>
>> I was looking at some newly cooked data and am getting results for beta
>> vs. momentum that look strange.
>>
>> The plot for the newly cooked data ->
>> http://www.jlab.org/Hall-B/secure/g8b/ASU/tmp/NewBetaVsP.gif
>>
>> A plot of the previous version of cooked data ->
>> http://www.jlab.org/Hall-B/secure/g8b/ASU/tmp/OldBetaVsP.gif
>>
>> The plots are from PERP, 1.5 GeV, run 48483. The new plot only contains
>> events from file A01.B02, while the plot of the previous cook has all A01
>> files.
>>
>> The resolution looks much better, but we now have and extra stripe below
>> the proton, and the stripe below the pions is crossing the kaons more
>> heavily.
>>
>> Is anyone else seeing this sort of behavior?
>>
>> Take care,
>> Michael
>>
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>
>
>
> -- 
> Cheers,
> Charles Hanretty
>