<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000'>The way to figure out is to look at the flux and yield and normalized yield per E-bin, that is the finest binning. If they are consistent, the the problem is in re-binning procedure. If they are not, then we have to look further. Technically speaking there is not unusual that you may have holes on photon spectrum, that would just indicate that some of the counters are dead. <div><br><div><span name="x"></span>-Eugene<span name="x"></span><br></div><br><hr id="zwchr"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"Michael C. Kunkel" <mkunkel@jlab.org><br><b>To: </b>"Eugene Pasyuk" <pasyuk@jlab.org>, "Johann Goetz" <theodore.goetz@gmail.com><br><b>Cc: </b>"g12" <g12@jlab.org><br><b>Sent: </b>Friday, March 28, 2014 3:55:45 PM<br><b>Subject: </b>Re: [G12] GFlux<br><br>
Greetings,<br>
<br>
I am wondering where we are at with the flux issue?<br>
Meaning, what is going on with the flux in the 3.5 GeV region?<br>
<br>
I feel that the flux is in error for a few reasons. <br>
First when I bin flux in 15 MeV, I see 0 flux at 3.515 - 3.53.<br>
Second, when I bin flux in 50 MeV binning I see a drop in flux at
3.5 MeV<br>
Here is the output<br>
//<br>
3.45 3.5 1.06825209003e+12<br>
3.5 3.55 470202243457.0<br>
3.55 3.6 1.69234003548e+12<br>
//<br>
<br>
Third reason is that if you look at my attached pdf, I show the pi0
cross section for various energies, if you were to go to compare the
cross sections around 3.5 GeV to the neighboring Egamma bins, you
will notice a sizable discrepancy. See G12_XSection_ALL.pdf<br>
<br>
Fourth reason, if I were to compare the pi0 cross section in unit of
dsigma/dt and compare it other experiments at 4 and 5 GeV, our cross
section is off by a factor of 2, see t_vs_dsigdt_Compare.pdf<br>
<br>
In order for any g12 papers to be published, we need verification of
cross sections, which as of this moment I do not believe we have.<br>
<br>
BR<br>
MK<br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 3/25/14 10:16 PM, Eugene Pasyuk
wrote:<br>
</div>
<blockquote cite="mid:1908667858.873792.1395800206351.JavaMail.root@jlab.org">
<style>p { margin: 0; }</style>
<div style="font-family: arial,helvetica,sans-serif; font-size:
12pt; color: #000000">This is not quite correct, especially when
bins are small and comparable with the width of E-bin.
<div>Just imagine, You energy bin is 3.000-3.015 GeV. E-bin
let's say covers 3.0121-3.0181 GeV. The center of E-bin will
be 3.01505 GeV. When you enter this into the histogram it will
fall to 3.015-3.030 bin then. However, this E-bin should be
split between two adjacent bins in new binning scheme. There
are two possible ways of doing this. Either randomize energy
within the width of the E-bin before you enter it to th
ehistogram, or split it between adjacent bins using weight
which depends on how the bin boundary splits E-bin and have
two entries to the histogram with sum of the weights equal
one. You can imagine, if the bin width is chosen to be less
than the widths of E-bin, then you will get completely empty
bins in resulting histogram.<br>
<br>
<div><span></span>-Eugene<span></span><br>
</div>
<br>
<hr id="zwchr">
<blockquote style="border-left:2px solid
#1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From:
</b>"Johann Goetz" <a class="moz-txt-link-rfc2396E" href="mailto:theodore.goetz@gmail.com" target="_blank"><theodore.goetz@gmail.com></a><br>
<b>To: </b>"Eugene Pasyuk" <a class="moz-txt-link-rfc2396E" href="mailto:pasyuk@jlab.org" target="_blank"><pasyuk@jlab.org></a><br>
<b>Sent: </b>Tuesday, March 25, 2014 9:12:49 PM<br>
<b>Subject: </b>Re: [G12] GFlux<br>
<br>
<p dir="ltr">I consider the beam energy to be the center of
the energy paddle and fill the histogram at that energy
with the number if counts in the gflux file. Is that
wrong?</p>
<div class="gmail_quote">On Mar 25, 2014 5:59 PM, "Eugene
Pasyuk" <<a href="mailto:pasyuk@jlab.org" target="_blank">pasyuk@jlab.org</a>>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div style="font-size:12pt;font-family:arial,helvetica,sans-serif">I
see four numbers in each row in this file. I figured
the first one is E-bin number. What are the other
three? I guess the second and the fourth are some
energies. What is the third number which is integer
and varies a lot.<br>
When you say you "histogram" does it mean you take
one fixed number for each E-bin (beam centroid?) and
put it in the histogram, or something else? <br>
<br>
<div><span></span>-Eugene<span></span><br>
</div>
<br>
<hr>
<blockquote style="padding-left:5px;font-size:12pt;font-style:normal;margin-left:5px;font-family:Helvetica,Arial,sans-serif;text-decoration:none;font-weight:normal;border-left:2px
solid #1010ff"><b>From: </b>"Johann Goetz" <<a href="mailto:theodore.goetz@gmail.com" target="_blank">theodore.goetz@gmail.com</a>><br>
<b>To: </b>"g12" <<a href="mailto:g12@jlab.org" target="_blank">g12@jlab.org</a>><br>
<b>Sent: </b>Tuesday, March 25, 2014 5:40:42 PM<br>
<b>Subject: </b>Re: [G12] GFlux<br>
<br>
<div dir="ltr">The output of gflux includes a file
that has the energies of the individual energy
paddles and the counts. These files are then
used to fill a histogram in the g12-gflux script
where the range and bins are specified on the
command line. The energies are slightly
"corrected" to the ones found in the following
file:
<div>
/group/clas/parms/pcor/g12/tagger_energies.dat</div>
<div>But, the correction is very small and
averaged over the whole run period (i.e. not
one a run-by-run basis).</div>
<div>
<div><br>
</div>
</div>
<div>And before you ask, the the summing of the
flux is valid to at least 4 figures -
probably 5. </div>
</div>
<div class="gmail_extra"><br clear="all">
<div>-- <a href="https://sites.google.com/site/theodoregoetz/" target="_blank">Johann</a></div>
<br>
<br>
<div class="gmail_quote">On Tue, Mar 25, 2014 at
4:28 PM, Michael C. Kunkel <span dir="ltr"><<a href="mailto:mkunkel@jlab.org" target="_blank">mkunkel@jlab.org</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
Greetings,<br>
<br>
If the data shows a hole at beam energies,
how does the gflux for this<br>
energy have events?<br>
Below is a table of Gflux for 15MeV binning,
which is to fine for<br>
analysis but great for illustrating this
question.<br>
<br>
Also, notice the 0 entries at 3.5 GeV, and
low events in neighbors.<br>
FORMAT: Emin:Emax:Flux<br>
<br>
<br>
1.115 1.13 0.0<br>
1.13 1.145 25237172620.6<br>
1.145 1.16 37307196694.5<br>
1.16 1.175 596831493113.0<br>
1.175 1.19 673624146169.0<br>
1.19 1.205 1.04119981246e+12<br>
1.205 1.22 1.13209512976e+12<br>
1.22 1.235 1.31100861162e+12<br>
1.235 1.25 1.41003737583e+12<br>
1.25 1.265 708211172683.0<br>
1.265 1.28 1.00917704833e+12<br>
1.28 1.295 1.73677052381e+12<br>
1.295 1.31 1.03214604848e+12<br>
1.31 1.325 885037422087.0<br>
1.325 1.34 1.24724378455e+12<br>
1.34 1.355 857127526644.0<br>
1.355 1.37 278577324131.0<br>
1.37 1.385 881394713415.0<br>
1.385 1.4 1.00989383319e+12<br>
1.4 1.415 1.17772439858e+12<br>
1.415 1.43 1.49431916406e+12<br>
1.43 1.445 676795968575.0<br>
1.445 1.46 1.39265456336e+12<br>
1.46 1.475 1.37504480556e+12<br>
1.475 1.49 737560406053.0<br>
1.49 1.505 1.30281481429e+12<br>
1.505 1.52 1.31266851454e+12<br>
1.52 1.535 1.14281511307e+12<br>
1.535 1.55 610057791731.0<br>
1.55 1.565 1.19234909002e+12<br>
1.565 1.58 498029161281.0<br>
1.58 1.595 774221479808.0<br>
1.595 1.61 1.19361035315e+12<br>
1.61 1.625 1.06766392605e+12<br>
1.625 1.64 933519396135.0<br>
1.64 1.655 585102241894.0<br>
1.655 1.67 800861230220.0<br>
1.67 1.685 968140194800.0<br>
1.685 1.7 616308054000.0<br>
1.7 1.715 912309428155.0<br>
1.715 1.73 853024554819.0<br>
1.73 1.745 710609203700.0<br>
1.745 1.76 1.08815959342e+12<br>
1.76 1.775 1.02918324853e+12<br>
1.775 1.79 752183611352.0<br>
1.79 1.805 1.03490939367e+12<br>
1.805 1.82 730065288937.0<br>
1.82 1.835 1.01433906239e+12<br>
1.835 1.85 1.02979831726e+12<br>
1.85 1.865 615893688685.0<br>
1.865 1.88 874150396134.0<br>
1.88 1.895 896177857404.0<br>
1.895 1.91 571292987771.0<br>
1.91 1.925 871214929019.0<br>
1.925 1.94 822118426450.0<br>
1.94 1.955 611615944721.0<br>
1.955 1.97 965927104595.0<br>
1.97 1.985 822267766243.0<br>
1.985 2.0 492626746790.0<br>
2.0 2.015 862753090828.0<br>
2.015 2.03 941649256469.0<br>
2.03 2.045 622082896902.0<br>
2.045 2.06 820144299324.0<br>
2.06 2.075 884652021494.0<br>
2.075 2.09 661345117113.0<br>
2.09 2.105 957598861367.0<br>
2.105 2.12 708490042103.0<br>
2.12 2.135 566369924275.0<br>
2.135 2.15 474546075393.0<br>
2.15 2.165 692894638389.0<br>
2.165 2.18 633696565449.0<br>
2.18 2.195 1.25916127707e+12<br>
2.195 2.21 452535985730.0<br>
2.21 2.225 888034787498.0<br>
2.225 2.24 927439628701.0<br>
2.24 2.255 765262297794.0<br>
2.255 2.27 604926963834.0<br>
2.27 2.285 629335652375.0<br>
2.285 2.3 514910298238.0<br>
2.3 2.315 812968923663.0<br>
2.315 2.33 540255690719.0<br>
2.33 2.345 710261806621.0<br>
2.345 2.36 768397230819.0<br>
2.36 2.375 582062396011.0<br>
2.375 2.39 630704170058.0<br>
2.39 2.405 705645287962.0<br>
2.405 2.42 583508371550.0<br>
2.42 2.435 719849272183.0<br>
2.435 2.45 596094143707.0<br>
2.45 2.465 564090037414.0<br>
2.465 2.48 674316483127.0<br>
2.48 2.495 495228291920.0<br>
2.495 2.51 796123221870.0<br>
2.51 2.525 771594160133.0<br>
2.525 2.54 492411586554.0<br>
2.54 2.555 587323426393.0<br>
2.555 2.57 395800237494.0<br>
2.57 2.585 497141999612.0<br>
2.585 2.6 569909994439.0<br>
2.6 2.615 471441993088.0<br>
2.615 2.63 471790834414.0<br>
2.63 2.645 577739104258.0<br>
2.645 2.66 446897506369.0<br>
2.66 2.675 425924604219.0<br>
2.675 2.69 657284720888.0<br>
2.69 2.705 509839235972.0<br>
2.705 2.72 475203266123.0<br>
2.72 2.735 412635840375.0<br>
2.735 2.75 674519870397.0<br>
2.75 2.765 389624544425.0<br>
2.765 2.78 609893184411.0<br>
2.78 2.795 598744224578.0<br>
2.795 2.81 422552580860.0<br>
2.81 2.825 678610683392.0<br>
2.825 2.84 409695314563.0<br>
2.84 2.855 627296617807.0<br>
2.855 2.87 573039567654.0<br>
2.87 2.885 435133697461.0<br>
2.885 2.9 649347542502.0<br>
2.9 2.915 438132822181.0<br>
2.915 2.93 596045706663.0<br>
2.93 2.945 612238952007.0<br>
2.945 2.96 422719982862.0<br>
2.96 2.975 588371819982.0<br>
2.975 2.99 616191013826.0<br>
2.99 3.005 540926171982.0<br>
3.005 3.02 318397775104.0<br>
3.02 3.035 364624375976.0<br>
3.035 3.05 369843650705.0<br>
3.05 3.065 275693588687.0<br>
3.065 3.08 365604500894.0<br>
3.08 3.095 250216265266.0<br>
3.095 3.11 375675031024.0<br>
3.11 3.125 476810476117.0<br>
3.125 3.14 251390414115.0<br>
3.14 3.155 419690996436.0<br>
3.155 3.17 286013104573.0<br>
3.17 3.185 380995241526.0<br>
3.185 3.2 327030646036.0<br>
3.2 3.215 274517324906.0<br>
3.215 3.23 416726244951.0<br>
3.23 3.245 559740826159.0<br>
3.245 3.26 387075736248.0<br>
3.26 3.275 343494698289.0<br>
3.275 3.29 467326628572.0<br>
3.29 3.305 494266990137.0<br>
3.305 3.32 472838022140.0<br>
3.32 3.335 249310915013.0<br>
3.335 3.35 283933122192.0<br>
3.35 3.365 597494155644.0<br>
3.365 3.38 347709473851.0<br>
3.38 3.395 469145628168.0<br>
3.395 3.41 235898812493.0<br>
3.41 3.425 362199412402.0<br>
3.425 3.44 532701421569.0<br>
3.44 3.455 467292197773.0<br>
3.455 3.47 453447282168.0<br>
3.47 3.485 361436533945.0<br>
3.485 3.5 449182174859.0<br>
3.5 3.515 179551703309.0<br>
3.515 3.53 0.0<br>
3.53 3.545 350280790151.0<br>
3.545 3.56 637140555692.0<br>
3.56 3.575 588057645110.0<br>
3.575 3.59 541814354100.0<br>
3.59 3.605 767261690036.0<br>
3.605 3.62 332154566963.0<br>
3.62 3.635 366426679394.0<br>
3.635 3.65 541240533201.0<br>
3.65 3.665 361641638898.0<br>
3.665 3.68 223165320203.0<br>
3.68 3.695 541460269417.0<br>
3.695 3.71 282057181004.0<br>
3.71 3.725 318811531530.0<br>
3.725 3.74 452785379096.0<br>
3.74 3.755 274496168574.0<br>
3.755 3.77 422404313178.0<br>
3.77 3.785 434777507704.0<br>
3.785 3.8 282152873690.0<br>
3.8 3.815 388083191100.0<br>
3.815 3.83 399265887124.0<br>
3.83 3.845 322338229290.0<br>
3.845 3.86 338018634439.0<br>
3.86 3.875 219276967417.0<br>
3.875 3.89 465804890065.0<br>
3.89 3.905 377518940783.0<br>
3.905 3.92 494456690177.0<br>
3.92 3.935 433453516978.0<br>
3.935 3.95 252274468259.0<br>
3.95 3.965 475373426165.0<br>
3.965 3.98 282811468571.0<br>
3.98 3.995 406045132039.0<br>
3.995 4.01 312730315238.0<br>
4.01 4.025 470594492917.0<br>
4.025 4.04 349257729547.0<br>
4.04 4.055 279260364376.0<br>
4.055 4.07 434362699962.0<br>
4.07 4.085 238282355243.0<br>
4.085 4.1 424665409149.0<br>
4.1 4.115 280380792467.0<br>
4.115 4.13 447525411083.0<br>
4.13 4.145 389218745036.0<br>
4.145 4.16 272773744561.0<br>
4.16 4.175 416668774571.0<br>
4.175 4.19 457741149259.0<br>
4.19 4.205 270474957581.0<br>
4.205 4.22 462790713555.0<br>
4.22 4.235 332735623646.0<br>
4.235 4.25 275662853810.0<br>
4.25 4.265 305513621376.0<br>
4.265 4.28 410076213126.0<br>
4.28 4.295 387557655839.0<br>
4.295 4.31 233523813972.0<br>
4.31 4.325 400879966345.0<br>
4.325 4.34 396154678062.0<br>
4.34 4.355 214336871573.0<br>
4.355 4.37 207054972335.0<br>
4.37 4.385 354432043454.0<br>
4.385 4.4 268714617035.0<br>
4.4 4.415 174979042786.0<br>
4.415 4.43 173375313599.0<br>
4.43 4.445 179570800942.0<br>
4.445 4.46 361918729954.0<br>
4.46 4.475 429970441172.0<br>
4.475 4.49 297198972337.0<br>
4.49 4.505 459418373115.0<br>
4.505 4.52 345874555789.0<br>
4.52 4.535 426103517141.0<br>
4.535 4.55 309209988159.0<br>
4.55 4.565 304951470359.0<br>
4.565 4.58 450559434174.0<br>
4.58 4.595 277916355849.0<br>
4.595 4.61 200280173919.0<br>
4.61 4.625 420977338325.0<br>
4.625 4.64 346795076479.0<br>
4.64 4.655 303571900157.0<br>
4.655 4.67 349237466285.0<br>
4.67 4.685 273303785583.0<br>
4.685 4.7 345523192246.0<br>
4.7 4.715 362458201636.0<br>
4.715 4.73 252864810085.0<br>
4.73 4.745 287431010095.0<br>
4.745 4.76 407384848522.0<br>
4.76 4.775 223841624305.0<br>
4.775 4.79 203527451994.0<br>
4.79 4.805 186064192378.0<br>
4.805 4.82 414281456782.0<br>
4.82 4.835 376032383951.0<br>
4.835 4.85 200364115883.0<br>
4.85 4.865 401230883097.0<br>
4.865 4.88 391468496185.0<br>
4.88 4.895 354667712464.0<br>
4.895 4.91 279441107884.0<br>
4.91 4.925 290521222455.0<br>
4.925 4.94 427805095943.0<br>
4.94 4.955 238396835185.0<br>
4.955 4.97 237087398075.0<br>
4.97 4.985 238677728278.0<br>
4.985 5.0 466393033680.0<br>
5.0 5.015 201556281112.0<br>
5.015 5.03 299745410214.0<br>
5.03 5.045 341961220657.0<br>
5.045 5.06 305926541114.0<br>
5.06 5.075 385083874020.0<br>
5.075 5.09 238658682950.0<br>
5.09 5.105 338588394694.0<br>
5.105 5.12 422223883425.0<br>
5.12 5.135 298956563429.0<br>
5.135 5.15 387297275757.0<br>
5.15 5.165 280783183169.0<br>
5.165 5.18 257466628751.0<br>
5.18 5.195 393576308924.0<br>
5.195 5.21 314127373912.0<br>
5.21 5.225 357980308412.0<br>
5.225 5.24 245073968465.0<br>
5.24 5.255 196708502651.0<br>
5.255 5.27 281339784057.0<br>
5.27 5.285 181803381088.0<br>
5.285 5.3 325929092225.0<br>
5.3 5.315 219474051464.0<br>
5.315 5.33 449669312291.0<br>
5.33 5.345 187979242858.0<br>
5.345 5.36 424496739655.0<br>
5.36 5.375 195913478448.0<br>
5.375 5.39 407973783769.0<br>
5.39 5.405 390351891472.0<br>
5.405 5.42 191462081973.0<br>
5.42 5.435 425907962446.0<br>
5.435 5.45 242697081405.0<br>
5.45 5.465 0.0<br>
5.465 5.48 0.0<br>
5.48 5.495 0.0<br>
<br>
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G12 mailing list<br>
<a href="mailto:G12@jlab.org" target="_blank">G12@jlab.org</a><br>
<a href="https://mailman.jlab.org/mailman/listinfo/g12" target="_blank">https://mailman.jlab.org/mailman/listinfo/g12</a><br>
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<pre>_______________________________________________
G12 mailing list
<a class="moz-txt-link-abbreviated" href="mailto:G12@jlab.org" target="_blank">G12@jlab.org</a>
<a class="moz-txt-link-freetext" href="https://mailman.jlab.org/mailman/listinfo/g12" target="_blank">https://mailman.jlab.org/mailman/listinfo/g12</a>
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