[G14_run] Test on the eloss package

[Haiyun Lu]

Dear g14ers,

I did a straight test on the eloss package of g14. I made up some events 
of proton and pi-. They are at fixed vertex position at (0,0,-7.5), 
which is the center of the target. They are at the fix polar angle, 90 
degree, which is perpendicular to the beam line. The azimuthal angle and 
the momentum are variable. Then I plot the energy loss versus the 
momentum for proton and pi-. I attached a file "eloss_test.png". There 
are two bands in the histogram. The upper one is for proton and the 
lower one is for pi-.

Best regards,
Haiyun
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