View source for Eta/Eta-Prime Meeting 2016-02-08

=Video Conferencing Information=

''<font color=red>Meeting Time: 03:15 p.m. EST</font>''

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=Participant Direct Lines=

* JLab Phone: in CC F326 is 757-269-6460 (usual room)
* JLab Phone in CC L207 is 757-269-7084
* Phone in the Regina Video-conference Suite is 306-585-4204

= References =

# None yet

= Action Items =

# Grad students collect key plots on Wiki
# List of plugins and analysis cuts
# Cross sections of eta, eta-prime vs energy
# Try to run some of the jobs locally at FIU, Regina

= Agenda =

# Announcements
# Action Items
# Review ongoing work
# Discuss future goals
# Any other business

= Minutes =

''Attendees: Werner, Joerg, Eric, Mahmoud (FIU), Will M. (CMU), Tegan, Zisis (Regina)"

# Announcements
# Action Items:
## Collect plots from all three institutions.  Collect list of plugins, cut list. For next meeting in 2 weeks.
# Logistics: meetings, minutes.
# Review ongoing work
## FIU: Mahmoud is 3rd year student working on photo production eta prime. Works also on Start counter propagation time and corrections for the calibration plus online monitoring plugin.  Has produced have t_res and efficiency for online monitoring. Has done simulation using genr8 for 100k eta-prime to eta-gg, eta->pi+pi-, clear peak in simulations, but broad.  9GeV gammas. Eric looks at pi+pi-g so far, harder to analyze.
## CMU: Will 4th year student working on Sigma beam asymmetry for eta. Working also on calibration of BCAL with pi0.
## Regina: Tegan 2nd year student, working on eta-prime. Reconstruction and simulation code last 6 months included taking the code from full waveform to single energy and time (noise studies were done, which allowed this).  Used Simon's GenEtaRegge which generates initial decay of eta-prime (filter out eta->egg topology).  New type of shower reconstruction for the BCAL was also done, and checked in github. Eta-prime: pi+pi-eta with eta to gg.  Pure signal sim for cuts, applied to data and bggen; nice peaks with low acceptance (events lost).  Not an order of magnitude.  We could look at what the MC cuts.  Lower BCAL, FCAL to 100, 100 MeV.  Not using kinematic fitter (used vertex fitter).  Farm is slow us down.  Can we collect data in REST files.  Werner: a lot of etas come from resonant production at low energies (nothing left over 3 GeV in data).  Try to run some of the jobs locally at FIU, Regina.
## Issues: photo production info: not much around, rates, reconstruct.  Do we understand cross section accuracy?    There is gp photo production info at our energies 3 GeV and such, but we are still ways off understanding the detector to be able to get out reasonably accurate cross sections.  Not a lot of good measurements at 6-9 GeV.  Can we look at lower energy to calibrate out of it? 
# Discuss future goals
# Any other business