<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div>did vert2 tomography show anything?<div><br><div><div>On Mar 24, 2013, at 9:39 PM, Michael C. Kunkel wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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Greetings,<br>
<br>
It occurred to us that I should plot this with the same lepton
momenta range. (0-1.5 GeV)<br>
The plot is attached.<br>
<br>
BR<br>
MK<br>
<br>
<br>
<div class="moz-cite-prefix">On 3/24/13 7:42 PM, Michael C. Kunkel
wrote:<br>
</div>
<blockquote cite="mid:514F8F49.2040704@jlab.org" type="cite">Greetings,
<br>
<br>
I am still analyzing my vertex calculations, I have nothing final
yet to show.
<br>
<br>
But I did have a question about the hypothesis that the events
outside of the target are conversions.
<br>
<br>
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?
<br>
<br>
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.
<br>
<br>
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.
<br>
<br>
I have attached the plot showing the comparison. Both plots are
normalized.
<br>
So I again ask how can the events from gamma p -> p pi0 have
tracks outside of the target? Conversion?
<br>
<br>
<br>
BR
<br>
MK
<br>
<br>
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<span><compare_vertices_PPipPimEpEmGamvs_PEpEmGam_samemomenta.jpg></span>_______________________________________________<br>G12 mailing list<br><a href="mailto:G12@jlab.org">G12@jlab.org</a><br>https://mailman.jlab.org/mailman/listinfo/g12<br></blockquote></div><br><div apple-content-edited="true">
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