[G14_run] Questions about K0 Lambda channel.

[A.M. Sandorfi]

Dao & co.,

A list of "good runs" with their triggers are in the attached file, at least
for the beginning part of g14. (Here "good" means no dubious comments in
either the run file or in the log book and a reasonable live time.) I'll
continue to update this and send out revisions as I work my way through the
g14 log.
Andy



On 2/16/12 12:07 PM, "Paul Mattione" <pmatt at jlab.org> wrote:

> 68050 used a single-sector trigger.  The trigger was changed to a two-sector
> trigger between runs 68197 and 68198.  We are now running with a 2 sector
> trigger and 1-sector pre-scaled, but I'm not sure what run that switch was
> made.  Try using runs after 68197.
> 
> I don't know anything about rootbeer or GPID to help you there.
> 
>  - Paul
> 
> On Feb 14, 2012, at 11:22 PM, Dao Ho wrote:
> 
>> Dear all,
>> 
>> I just finished a short study of the K0 Lambda channel using the rootbeer
>> package.
>> I processed about 3.6 million events of the run 68050.
>> 
>> Out of that 3.6 millions, I got for
>> mostly are 2 or 3-track events.
>> 5-track events : the number of events is 4 events.
>> 4-track events: the number of events is 130 events--->only 13 events were
>> identified as 2 pi-, 1 pi+, and 1 proton. I used the GPID bank.
>> 
>> 
>> Were these number expected? They seem small to me?
>> Is it because of the nature of the run 68050 (one or two -particle
>> triggered?)?
>> How to use the GPID information to check whether the same photon was used
>> for each particle?
>> 
>> Let me know your opinion.
>> Sincerely,
>> Dao Ho
>> 
>> _______________________________________________
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>> G14_run at jlab.org
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> 
> 
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