[G12] urgent help needed please

[Johann Goetz]

Hi g12,
So it seems no one else is looking at data below 3.6 GeV in g12. This is
understandable as only the 3-prong trigger covered the entire tagging range.
Please take a look at my thesis, specifically, Fig.4.24 on page 143. Notice
the large jump in events seen in the data at 3.6 GeV. Coincidence? I think
not but I can't prove it. There are three possible explanations for this
jump:

    1. it is real physics
    2. gflux did not do an accurate job below 3.6 GeV
    3. the trigger efficiency between the 3 prong and production triggers is
different and was not taken into account anywhere (gsim? gflux? gpp?)

My instinct points me to #3 above but I'm not sure what is to be done about
it. I can not take much more time before I have to defend so I am looking
for some scaling factor and an a plausible explanation.

Thank you,


-- 
Johann Goetz
jgoetz at ucla.edu
UCLA Dept. Physics & Astronomy
Nefkens Group
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