[G12] Question of the conversion hypothesis

[Michael C. Kunkel]

Greetings,

I am still analyzing my vertex calculations, I have nothing final yet to 
show.

But I did have a question about the hypothesis that the events outside 
of the target are conversions.

If I were to have a different topology in which I could have a pi0 in 
the final state decay to e+e-gamma, then these events would also show 
the same ratio of events outside of the target, correct?

If so, then I can look at the gamma p -> P Pip Pim Pi0 (e+e-gamma) MVRT 
and see what fraction of events occur outside of the target, because 
according to the conversion hypothesis, 2 charged tracks should be 
outside of the target and the other 3 should be inside, so I would see a 
shifted distribution of the same.

The fact is when I look at the vertex position for gamma p -> P Pip Pim 
Pi0 (e+e-gamma, over 90% of my events are inside of the target.

I have attached the plot showing the comparison. Both plots are normalized.
So I again ask how can the events from gamma p -> p pi0 have tracks 
outside of the target? Conversion?


BR
MK
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