[Halld-offline] Offline Meeting Minutes, May 1, 2013

[Mark M. Ito]

Find the minutes at 
https://halldweb1.jlab.org/wiki/index.php/GlueX_Offline_Meeting,_May_1,_2013#Minutes 
and below.
_____

GlueX Offline Meeting, May 1, 2013
Minutes

Present:
* CMU: Will Levine, Paul Mattione, Curtis Meyer
* IU: Matt Shepherd
* JLab: Mark Ito (chair), David Lawrence, Beni Zihlmann
* UConn: Alex Barnes, Richard Jones

Announcements

* Mark called attention to the [31]new tagged release announced last
week.

Standard ROOT TTree Format

Paul has added to [32]his wiki page, presented last time. He let us
through some examples in the usage section, on how to access the data
using the native Draw method of ROOT and how to save data to the tree.

Matt suggested some scheme for having a quick index of generated
particle topology that sums over all possible intermediate resonances,
e. g., π^+π^-π^0 whether or not they came from an ω or other resonance.
Paul will implement a scheme.

Update on Geant4 conversion

We will freeze development on HDGeant probably around the time of
collaboration meeting.

BCAL Reconstruction Status Update

Will gave an update on his BCAL reconstruction improvements. He
outlined status on a [33]wiki page. He described all of the current
options, some of which will (hopefully) be eliminated in the future. He
still intends to do a comparative study of the proposed default versus
the previous before it is officially adopted.

Beni will add his code now that the structure for choosing among
versions has been settled.

The Next Data Challenge

Mark presented [34]some ideas for incorporation into the next data
challenge.

Other issues that were contributed by the group were:
* improving job success efficiency
* add electromagnetic background
* add in dark noise in the BCAL
* opening up photon window, especially to higher photon energy,
perhaps 7.5 GeV to the end-point

Matt also pointed out that the data challenge 1 data needs older
software to be completely compatible. Although we think that the data
is still usable, that problem will get worse as time goes on.

We decided to continue this discussion during future offline meetings.
There did not seem to be a need for special meetings right away.

Retrieved from
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References

31. https://mailman.jlab.org/pipermail/halld-offline/2013-April/001319.html
32. https://halldweb1.jlab.org/wiki/index.php/Analysis_TTreeFormat
33. 
https://halldweb1.jlab.org/wiki/index.php/BCAL_Reconstruction_Status_Update_20130501
34. https://halldweb1.jlab.org/wiki/index.php/Data_Challenge_2:_Ideas