[G12] Question of the conversion hypothesis

[Michael C. Kunkel]

Greetings,

It occurred to us that I should plot this with the same lepton momenta 
range. (0-1.5 GeV)
The plot is attached.

BR
MK


On 3/24/13 7:42 PM, Michael C. Kunkel wrote:
> 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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