[G8b_run] Newly cooked data

[Franz Klein]

Volker,

I am working right now on the PART/GPID problem. When this is done, I 
have look into TOF and TAG calibrations for a few more runs (it looks 
like the tagTDC_correction files were missing for several runs).
I will recook all data for which I can get reasonable calibrations. I 
will create wiki tables like the ones for g9b.
The output can easily reduced to a few banks. However, since most 
collaborators are using rootbeer DSTs, they can fetch ROOT/DST files 
(all result banks for EVNT and PART based pid + TBER, EPIC) or 
SKIMS/DSTgpid files (only banks for GPID based pid + TBER, EPIC). Of 
course, we can discuss the amount of data to write to tape.

My comment to already approved analyses:
The idea to cut 'unstable' TOF paddles already on the reconstruction 
level came from complications we had with earlier comparisons of MC and 
real data. I think there was an advantage with such cuts for 
single-prong events, which should have good timing info - but for 
multi-track events we really need only 1 track to have good timing 
(ST+SC) to get the event start time. I think it makes sense to check any 
analysis requiring more than 1 track against recooked data, in 
particular those with low statistics.

Drink some Scotch in my name ... I missed the chance to visit Glasgow!

Cheers,
Franz

On 06/25/2013 05:20 PM, Volker Crede wrote:
> 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
>>>
>>> _______________________________________________
>>> G8b_run mailing list
>>> G8b_run at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/g8b_run
>> ===============================================================
>>                   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
>> ---------------------------------------------------------------
>>
>> _______________________________________________
>> G8b_run mailing list
>> G8b_run at jlab.org
>> https://mailman.jlab.org/mailman/listinfo/g8b_run
>
>

-- 
===============================================================
                   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
---------------------------------------------------------------