Radphi Video Conference 6/17/2003

June 17, 2003
University of Connecticut
Storrs, CT

Meeting Agenda:

1. Shower energy resolution in LGD - UConn
2. Progress on BGV reconstruction - W&M
3. Progress on PWA - Indiana
4. Final steps to NIM paper - discussion

• http://dustbunny.physics.indiana.edu/~dkrop/2pi
• http://www.physics.wm.edu/~steiner/radphi
• http://zeus.phys.uconn.edu/~kornicer/radphi/LGDresolution
• http://zeus.phys.uconn.edu/radphi/call-notes

Present: R. Jones, M. Kornicer, D. Steiner, D. Armstrong, S. Teige, D. Krop, Alex D., Elton Smith, C. Steffen, D. Sober

• He has a good fit to the η variance with a model
  
  For the η the spatial contribution is small, and we obtain a fit
  
  For the π° the spatial contribution cannot be ignored. To calculate that, he uses Elton's spatial model
  
  and propagate to the V() errors. In this way a global fit is obtained to all π° and η data
  
  where spatial term is parametrized as Elton specified. Will write these results in a note. For E852:
  

• He is working on Z-calibration and found some bugs. He is using the new time-list values to calibrate t->Z conversion and a speed of light of 9.4 cm/ns. Elton thought a value closer to 16cm/ns would be more reasonable. The Z distribution is an asymmetric flat-top. He shows a nice BSD pixel -BGV correlation plot. He also showed that a significant number of BGV counters with adjacent counters hit, which indicates the need for merging adjacent hits.
• He also showed a nice correlation between Z from timing and the ln(up/down) in pulse height.

• He did a mass-dependent fit using a model for S-wave using Adam's model (AMP is equivalent) For d-wave he wants to use E852 ππ d-wave parameters which uses a coupled-channel analysis of ππ d-wave including the f2(1270) but also general scattering amplitudes. The new fit with this model is not ready for prime time, but progress is being made.

• need a few paragraphs to describe LGD calibration -R. Jones will do.
• also need to make an author list. R. Jones will send around a request to each institution.