[Frost] Local angle Cut

[Sungkyun Park]

Hi Eugene,

The following is the option used in g9a experiment
trk_mon_lite -Cchisq.lt.10.0 -Cbeta.lt.0.8
                   -A1l-24.0 -A1u-8.0 -A2l-10.0 -A2u10.0 -A3l-8.0 -A3u10.0

I checked histograms for Local angle in Region1, 2, and 3.
In the histograms attached with this email,
the black line is made before applying local-angle-cut and the red is made after.
This histogram is made from cooked_63550.A05.B00
The region 2 and 3 are not bad when I use the option of g9a, However, there is serious problem in the region 1.
After applying cut, the main peak is removing. 

I will decide local-angle-cut again.
Is there some conditions to decide the local-angle-cut?

I remember when I have decided the local-angle-cut in g9a, we had the near region of the narrow peak.
in http://clasweb.jlab.org/rungroups/g9/wiki/index.php/DC_Calibration#07.2F30.2F2008

In the case of g9b, do I decide the near region of the narrow peak?

And In the histograms attached, what the x-axis means? What is the number of x-axis?

Sung
Florida State University


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