[G12] Check g12 pass1 data

[Dennis Weygand]

We are looking into this. The skims are based on PID, and apparently  
SEB is finding kaons that PID is not- that is all we know right now.
It may also be that PID is finding kaons that SEB is not- I am not  
sure that Valery has checked for that.
In any event, no events are lost, but if you wish to exploit the SEB  
kaons, you may have to sum over the first five skims, which is not  
really a big deal, but perhaps not
as convenient as using a more exclusive skim. Certainly for quick  
checks for enhanced kaons, the skims are fine, but may nor may not be  
used for final event selection.
Dennis

On Aug 28, 2009, at 1:58 PM, Carlos Salgado wrote:

> Dear Valery
>
> I do not understand your statement 2.
> It seems to me that ALL events that have a least one kaon are in  
> skim 1.
> Isn't this true? Some of those events could be in the other skims  
> but if
> you study kaons you do not need to analyze all skims, as all your
> events are contained in 1!
>
> The other problem you mention is on how will we  study the  
> efficiency of
> the skim cuts if we do not have processed files w/o those cuts? Can  
> we do
> some ramdom smaple of full data or have we already study those skim
> efficiencies?
>
> See you Carlos
>
> --  --  --  --  --  --  --  --  --  --  --  --  --  --  --  --  --  --
> Carlos W. Salgado
> Professor of Physics and Astronomy
> Director, NSU Astronomical Observatory
> Norfolk State University, Norfolk, VA23504        tel:  
> (757)823-9212/8909
> Jefferson Lab, Newport News, VA23606              tel: (757) 269-7859
> fax: (757) 823-8817, e-mail:salgado at jlab.org or carlos at nsu.edu
> http://www.jlab.org/~salgado
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--
Dennis Weygand
weygand at jlab.org
(757) 269-5926