[G14_run] Test on the eloss package

[Reinhard Schumacher]

Hello Haiyun,

	Nice work.  Your proton band looks like it gives higher energy loss for 
protons at a given momentum than Dao's and the others'.  At 300 MeV/c, 
your plot shows ~30 MeV energy loss, while Dao's shows ~10 MeV.  For 
pions the behavior is less clear: both your calculation and his give 
less than 2 MeV energy loss at 300 MeV/c, which is very likely too 
small.  So this leads to the questions:

1) Why do you get higher, probably closer to correct, energy losses for 
protons?

2) Why does the program give unrealistically small energy losses for 
everybody?

Reinhard

___________________________________________________________________
Reinhard Schumacher         Department of Physics, 5000 Forbes Ave.
Carnegie Mellon University, Pittsburgh, PA 15213, U.S.A.
phone: 412-268-5177         web: www-meg.phys.cmu.edu/~schumach
___________________________________________________________________

On 04/09/2014 05:16 PM, Haiyun Lu wrote:
> 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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