[G12] Minutes from 03/3/10 meeting

[Diane Schott]

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.
>
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