The situation 1 : γ P -> P π+ (π-)
The situation 2 : γ P -> P π- (π+)
The situation 3 : γ P -> π- π+ ( P )
The situation 1, 2, and 3 have two kinds of output particles. I calculate the difference of vertexs of these particles. I select particles less than 5 in these plots.
The situation 1 : γ P -> P π+ (π-) |
The situation 2 : γ P -> P π- (π+) |
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The situation 3 : γ P -> π- π+ ( P ) |
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When the ngrf number is more than 2, the photon energy in the data is not exact. I pick the data of ngrf = 0 or 1.
The ngrf number of the proton |
The ngrf number of the pi + |
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The ngrf number of the pi - |
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