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Greetings,<br>
<br>
So does this mean normalization is dependent on run?<br>
<br>
<pre class="moz-signature" cols="72">BR
MK
----------------------------------------
Michael C. Kunkel, PhD
Forschungszentrum Jülich
Nuclear Physics Institute and Juelich Center for Hadron Physics
Experimental Hadron Structure (IKP-1)
<a class="moz-txt-link-abbreviated" href="http://www.fz-juelich.de/ikp">www.fz-juelich.de/ikp</a></pre>
<div class="moz-cite-prefix">On 4/2/15 7:22 PM, Rafael Badui wrote:<br>
</div>
<blockquote cite="mid:A7722989-380B-47BF-AD6E-9E2E65C4A2BB@jlab.org"
type="cite">
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<div class="">Hi,</div>
<div class=""><br class="">
</div>
<div class="">To answer Lei’s question on how my results compares
with MK’s, I have attached my results and MK’s for run 56669. I
did not use error bars but the results look the same,
nonetheless. </div>
<div class=""><br class="">
</div>
<div class="">I wanted to post this on the wiki page, but it seems
that my jlab password does not work anymore. Is anyone else
having this issue?</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class="">Best regards,</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class="">Rafael</div>
<div class=""><br class="">
</div>
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<blockquote type="cite" class="">
<div class="">On Apr 1, 2015, at 7:57 AM, Michael C. Kunkel
<<a moz-do-not-send="true" href="mailto:mkunkel@jlab.org"
class="">mkunkel@jlab.org</a>> wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
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http-equiv="Content-Type" class="">
<div bgcolor="#FFFFFF" text="#000000" class=""> Greetings,<br
class="">
<br class="">
I to was curious to know why FSU and myself did not agree,
so I looked at the entire run range in which had the
lepton trigger set, also the MorB configuration was the
same.<br class="">
<br class="">
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="https://clasweb.jlab.org/rungroups/g12/wiki/index.php/TAGR_code#April_1">https://clasweb.jlab.org/rungroups/g12/wiki/index.php/TAGR_code#April_1</a><br
class="">
<br class="">
I noticed an overall difference of 3% from when I used
earlier runs. So I decided to look run by run and I
noticed there was a dependence on run.<br class="">
<br class="">
For instance compare run 56726 to run 57195 using this<br
class="">
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="https://www.jlab.org/Hall-B/secure/g12/mkunkel/MULTIPLE_PHOTONS/Plot_1.pdf">https://www.jlab.org/Hall-B/secure/g12/mkunkel/MULTIPLE_PHOTONS/Plot_1.pdf</a><br
class="">
<br class="">
<pre class="moz-signature" cols="72">BR
MK
----------------------------------------
Michael C. Kunkel, PhD
Forschungszentrum Jülich
Nuclear Physics Institute and Juelich Center for Hadron Physics
Experimental Hadron Structure (IKP-1)
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="http://www.fz-juelich.de/ikp">www.fz-juelich.de/ikp</a></pre>
<div class="moz-cite-prefix">On 31/03/15 20:51, Lei Guo
wrote:<br class="">
</div>
<blockquote
cite="mid:1FC24CF3-6456-4B68-88D6-AC43EF7CDBF3@jlab.org"
type="cite" class="">
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charset=windows-1252" class="">
Hi, MK and Michael,
<div class=""><br class="">
</div>
<div class="">In general I agree with Michael what you
are showing is reasonable. The 1-photon-only
probability plot shows basically the percentage (for
Egamma > 3.6GeV) is about 86.6%+-1% (eyeballing).
What Will showed from his ppbar channel is about
87%+-1% (also eyeballing, and he starts from 3.9GeV).
There is no difference here. The two plots (you and
will) looks dramatically different because of the
energy range (x-axis), and because of will shows on
the Y-axis from 0 to 100%, and you zoomed in from 80%
to 90%. It tells exactly the same story.</div>
<div class=""><br class="">
</div>
<div class="">For the low energy part (Egamma <3.6
GeV), I think Michael’s explanation is probably right
— although I won’t call it trigger efficiency or
inefficiency. It’s only inefficient when a event that
should have triggered and been recorded did not get
registered.</div>
<div class="">But even if you compare these two ranges,
it’s really a only 1.5% difference. Do you think our
systematic uncertainty on the normalization is less
than 1.5%? I think in the big picture, we are fine.</div>
<div class=""><br class="">
</div>
<div class="">But I do agree with MK that his picture is
different from FSU, particularly in the low energy
part, since it showed opposite trend. </div>
<div class=""><br class="">
</div>
<div class="">How does Rafael’s results compare with
you, particularly for the low energy part?</div>
<div class=""><br class="">
</div>
<div class="">Is it possible that again this is due to
you and FSU are not showing the data from exactly the
same set of runs?</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
<div apple-content-edited="true" class="">
<div class="">
<div class="">
<div class="">Lei Guo</div>
<div class="">Assistant Professor</div>
<div class="">Physics Department</div>
<div class="">Florida International University</div>
<div class="">Miami, FL</div>
</div>
<div class=""><br class="">
</div>
<div class="">email: <a moz-do-not-send="true"
href="mailto:leguo@fiu.edu" class="">leguo@fiu.edu</a> or
<a moz-do-not-send="true"
href="mailto:lguo@jlab.org" class="">lguo@jlab.org</a></div>
<div class="">Office:305-348-0234</div>
</div>
</div>
<br class="">
<div class="">
<blockquote type="cite" class="">
<div class="">On Mar 31, 2015, at 2:31 PM, Michael
Paolone <<a moz-do-not-send="true"
href="mailto:mpaolone@jlab.org" class="">mpaolone@jlab.org</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">Hi MK, All,<br class="">
<br class="">
This looks reasonable, and I think I can explain
the energy dependence. <br class="">
The key is that all events have to fire a
trigger whose efficiency is<br class="">
dependent on the momentum and angle of the
tracks created from the<br class="">
reaction which itself IS photon energy
dependent.<br class="">
<br class="">
Look at the 1 photon probability plot and ask
how likely is it that that<br class="">
photon is the one that created the trigger. For
very low energy photons<br class="">
the overall trigger efficiency drops, and since
we see an event at all, it<br class="">
becomes more likely that another higher energy
photon in the same beam<br class="">
bucket generated the reaction that triggered the
event.<br class="">
<br class="">
The sharp jump at 3.6 GeV shows that the event
is now more likely to<br class="">
trigger with just that photon (since that's
where the primary trigger<br class="">
starts).<br class="">
<br class="">
The downward slope after 3.6 GeV might again be
a trigger efficiency<br class="">
effect, where it becomes more likely that we
lose small angle tracks down<br class="">
the beam hole which could have fired the
trigger.<br class="">
<br class="">
-Michael<br class="">
<br class="">
<blockquote type="cite" class="">Greetings,<br
class="">
<br class="">
I did not want to show this last night because
I thought there was a bug<br class="">
in my code. But I do not think I have a bug in
my code, so I want to<br class="">
show you what I concluded.<br class="">
<br class="">
First of all, my result does not agree with
the values found by FSU or<br class="">
FIU. I actually see a strange dependence on
energy. What I am depicting<br class="">
are plots of the probability of multiple
photons within the same bucket<br class="">
as clasEvent choose ±1.002 ns, meaning the
photon energy on the X-axis<br class="">
of the plots are of clasEvent chosen, which
was the best timed beam<br class="">
photon compared to the average _of_ start
times.<br class="">
<br class="">
The data used for this is only the 566* runs,
which is approximately 7%<br class="">
of the data.<br class="">
Please see:<br class="">
<a moz-do-not-send="true"
href="https://clasweb.jlab.org/rungroups/g12/wiki/index.php/TAGR_code#March_31"
class="">https://clasweb.jlab.org/rungroups/g12/wiki/index.php/TAGR_code#March_31</a><br
class="">
<br class="">
--<br class="">
BR<br class="">
MK<br class="">
----------------------------------------<br
class="">
Michael C. Kunkel, PhD<br class="">
Forschungszentrum Jülich<br class="">
Nuclear Physics Institute and Juelich Center
for Hadron Physics<br class="">
Experimental Hadron Structure (IKP-1)<br
class="">
<a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="http://www.fz-juelich.de/ikp">www.fz-juelich.de/ikp</a><br
class="">
<br class="">
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class="moz-txt-link-freetext"
href="https://mailman.jlab.org/mailman/listinfo/g12">https://mailman.jlab.org/mailman/listinfo/g12</a><br
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</blockquote>
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