[G8b_run] Newly cooked data

[Volker Crede]

Franz,

Whatever the run group's decision on the (already) approved analyses is, I would like to see all the g8b data recooked. The increased statistics, in particular of more than 300% for our most important final state of all three final-state particles detected, is very interesting. 

I assume that the pictures you sent out are from the 1.5 GeV dataset. Are you going to recook this dataset once the PART/GPID problem is fixed? Can we also agree on reducing the output again to what is was earlier, so that we are mostly dealing with .B00 extensions?

Best wishes,

       Volker


On Jun 25, 2013, at 12:46 PM, Franz Klein wrote:

> Hi,
> as I mentioned several times, my quick (and dirty?) way to check the data quality has been the usual one: the histograms produced in user_ana (actually the one in seb/ subdirectory).
> Please see the attached gifs - there is a problem with PART/GPID: the velocity approaches beta=1.03 instead of 1.0 (therefore the curved 'mass peak').
> 
> To see the effect of cutting TDC values as 4095, see the STtdc_s2 plot ... 10,000 more but it shows it ...
> 
> Sorry,
> Franz
> 
> On 06/21/2013 01:31 PM, Michael Dugger 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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> 
> ===============================================================
>                  Franz J. Klein, Associate Professor
>                  CUA, Department of Physics
>                  Washington, DC 20064
>  office: Hannan Hall 206          phone: 202-319-6190
>  or: Jefferson Lab,CC F-243       phone: 757-269-6672
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