[G12] Minutes from 03/3/10 meeting

[salgado at jlab.org]

Just as a reference, g6c collected 3.58 x 10^12 photons in the 4.8-5.4 GeV
range.

> If I understand you correctly , this now is in agreement with my
> back-of-the-envelope estimate:
>
> 5X10^7 photons/sec X 40 days X 24 hours/day X 3600 sec/hour = 1.7X10^14
>
> Dennis
>
>
> On Mar 3, 2010, at 3:39 PM, Diane Schott wrote:
>
>> Hi Guys,
>>
>> I made a slight mistake in the meeting, using the first couple hundred
>> files I estimated about 1.947e14 (not the 1.947e16 I said in the
>> meeting)
>> photons over the entire data set.
>>
>> Sorry,
>> Diane
>>
>>> Hi folks,
>>>  Minutes from today's meeting can be found at:
>>>
>>> http://clasweb.jlab.org/rungroups/g12/wiki/index.php/03Mar10
>>>
>>> and pasted below:
>>>
>>> Agenda
>>>
>>>    * gflux
>>>    * cascades
>>>    * momentum corrections
>>>    * gagik's missing tracks
>>>    * Sasha Starostin's cascade analysis (bottom of the page)
>>>    * Mike's latest fit to the rho
>>>
>>> [edit]
>>> Minutes
>>>
>>>    * Attending: Sasha S., John P., Miles, Dennis, Diane, Heghine,
>>> Carlos,
>>> Will, Craig, Paul, Sasha O., Mukesh, Ben, Michael Paolone, Lei
>>>    * Diane is gonna run gflux on all of the g12 raw files -- they are
>>> quick jobs but the files need to be pulled down off the silo.
>>>    * Sasha is trying to reconcile with reality his numbers for the
>>> number
>>> of photons with g12 -- Diane will send him a few of her files so he
>>> can check. The number should be on the order of 1e14.
>>>    * Johann reports that he's getting a mass for the ground state
>>> cascade
>>> 15 MeV higher than the PDG mass. The data is 3 MeV off. Johann is
>>> going to check that gsim uses the correct magnetic field for swimming
>>> tracks. The MAGSCALE parameter in the gsim ffread card might be the
>>> culprit -- we've been using 0.502 when perhaps 0.5 is the correct
>>> number. He also will check which run number he's using to grab the
>>> parameters from the DB. a1c also needs the -X option to reconstruct
>>> gsim data correctly.
>>>    * Johann will also provide Craig with some p pi+pi- MC so he can
>>> kinematically fit it and get a look at the pull distributions.
>>>    * Heghine is going to rework the momentum corrections with better
>>> selections on exclusive events. The pions should have no background
>>> when they are treated as the missing particle.
>>>    * Ben would like Sasha S. to give a spectroscopy working group talk
>>> at
>>> the upcoming collaboration meeting. Paul would also like Johann to
>>> give an update on g12 status. Sasha S. seems to be doing the same
>>> analysis as Johann but he has a different interest in the results,
>>> namely to push forward a different proposal. The selections Sasha S.
>>> was making on his data were unclear to the group and we would like to
>>> postpone a talk until we can agree on the results. Paul suggests with
>>> getting together with Sasha S. during the collaboration meeting and
>>> prior to the SWG meeting to get to a group consensus.
>>>
>>> _______________________________________________
>>> G12 mailing list
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>>> https://mailman.jlab.org/mailman/listinfo/g12
>>>
>>
>>
>> --
>>
>>
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>
> --
> Dennis Weygand
> weygand at jlab.org
> (757) 269-5926
>
>
>
>
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