[Frost] About FSU version of the directions of the beam and target polarization

[Sungkyun Park]

Hi, all

I have decided the direction of the beam and target polarization by the eta (547).
The following web-page has described how I decided them :

  http://hadron.physics.fsu.edu/~skpark/research/resJul0511/research_aug3111_FROST.html

Briefly, the polarization observable, P_z is made by the combination of target polarizations (Step 1). 
There are seven periods in the circularly polarized data.
FSU group has selected the proper target polarization direction (Step 2).
There are  six target-combinations to get the polarization observable, P_z.
The observables made from the six combinations are compared and had the similar structure (Step 3.)
The FSU version of the target polarization direction is reasonable.

The eta(547) resonance made in the decay mode, gamma p -> p (eta) do not have the resonance (or peak) in the spin 3/2 (Step 4). We already fixed the target polarization direction. We can also decide the beam polarization direction from the upper fact.

The target polarization directions made from FSU group had the different values from the table-version and Jo-version (Step 5).

If you have some comments, let me know them.
In the upper description, Step number means picture name in the web-page.

Best Wishes

Sung

 Florida State University
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