[Clas_lmd] lepton pion PID

[Michael C. Kunkel]

Greetings,

So I was curious to reproduce my study on pion contamination without the 
use of CC or EC quantities.
I am attaching a plot that shows G12 data that shows 3 lines.
Red: G12 data with eloss on pions, pion mass setting, invariant mass 
PipPimGam; conditions Ngamma > 0 && abs(mm2_PPipPimGam)<0.01 && 
mE_PPipPim > 0.2

Blue: G12 data with eloss on leptons,lepton mass setting , invariant 
mass EpEmGam; conditions Ngamma > 0 && abs(mm2_PEpEmGam)<0.01 && 
mE_PEpEm > 0.2

Cyan: G12 data with eloss on leptons,lepton mass setting , invariant 
mass EpEmGam; conditions Ngamma > 0 && abs(mm2_PEpEmGam)<0.01 && 
mE_PEpEm > 0.2 && lepton PID through CC and EC. Histogram is scale by x10


As I concluded years ago, and is seen in the histogram, without CC or 
EC, the eta peak cannot be reproduced in the proper place.

Total data used:1/463 of g12 data set.

Hope this helps.


BR
MK
----------------------------------------
Michael C. Kunkel, PhD
Forschungszentrum Jülich
Nuclear Physics Institute and Juelich Center for Hadron Physics
Experimental Hadron Structure (IKP-1)
www.fz-juelich.de/ikp

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