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Greetings,<br>
<br>
My plots per run number show that the normalization can differ by as
much as 3% depending on the run number.<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 7:49 PM, Lei Guo wrote:<br>
</div>
<blockquote cite="mid:7B341A7B-3F26-4F55-BDE1-CECFB4C61D08@jlab.org"
type="cite">
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We only need one normalization (as a function of egamma) for the
whole running period, which I think you already have! What you are
and Rafael is showing is consistent. Maybe FSU did not show that
for the entire range.
<div class=""><br class="">
</div>
<div class="">Lei<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>
<blockquote type="cite" class="">
<div class="">On Apr 2, 2015, at 11:47 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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<div bgcolor="#FFFFFF" text="#000000" class=""> Greetings,<br
class="">
<br class="">
So does this mean normalization is dependent on run?<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 4/2/15 7:22 PM, Rafael
Badui wrote:<br class="">
</div>
<blockquote
cite="mid:A7722989-380B-47BF-AD6E-9E2E65C4A2BB@jlab.org"
type="cite" class="">
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charset=windows-1252" class="">
<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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<div class="">
<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="">
<meta content="text/html; charset=windows-1252"
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="">
<meta http-equiv="Content-Type"
content="text/html; 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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