[G12] Minutes from 3/24/2010 meeting

[Craig Bookwalter]

Hi folks,

Minutes from today's g12 meeting are at the following link:

http://clasweb.jlab.org/rungroups/g12/wiki/index.php/24Mar10

and below:

24Mar10
>From G12_wiki
[edit]
Agenda

    * Diane: More on the flux, as of today at 10am :
          o number of files = 45205
          o total photons (45205 files) = 6.096e+13
          o total photons with E>4.4 (45205 files) = 1.34783e+13
    * sync/++ offline message
    * Craig: Momentum corrections(?)
    * Craig/Johann: gamp build status

    * Analyses status:
          o eta pi- Delta++ : Diane
          o pi+ pi+ pi- Craig
          o Cascades Johann
          o Kaons Will/Mike
          o K+ K- (X) Mukesh
          o KKpi Miles
          o Omega cross-section

[edit]
Minutes

    * Attending: Johann, Dennis, Carlos, Mike P. x 2, William, Diane,
Craig, Ben, Paul, Miles, Mukesh
    * Diane's latest numbers for the flux are on the agenda. They
represent 34 events/pb for the upper end of the tagger, a factor of 2
short of what we expected. tripfixer has yet to be run, so perhaps we
will recover something from there, but probably not a factor of 2.
    * Craig reports that he's been reworking his code to work with his
ntuples to use a large set of files he skimmed for the omega
cross-section analysis, but then he realized that it seems in the past
that folks only used one good run for deriving momentum corrections.
So he kinda wasted his time here. He'll start using with run 56855 b/c
its his favorite run.
    * Diane showed a study of her background, comparing when the X
resonance is composed of eta-pi+ and eta-pi-. The eta-pi- resonance
prefers the forward angles. Pretty interesting.
    * gamp is built and sitting in the STABLE build area.
    * Craig is busy w/ momentum corrections and the omega cross section,
so he hasn't been updating the 3pi much. There are plots with 53.4% of
the data on his analysis page.
    * Craig showed a good fit to the omega using two gaussians plus a
third-order polynomial bg. The last ingredient would be the MC -- Mike
Williams dispatched a student at CMU to generate some MC weighted with
his results, and Craig will get in contact with him.
    * Carlos and Will showed a few plots from their pK+K- skim -- they are
still picking up crossover bands of out-of-time pions.
    * Mukesh will have some plots to show next week for his pK+K- analysis.
    * Miles shows a fit to the Lambda to check his pid--looks good.