MK,<br>OK, If I read your plots right, then 17.3 % of the time, you have at least two of the three tracks in the same sector for p pi- pi+ exclusive events in the data. This *should* be the same for simulations if we model the trigger logic correctly (which we don't at the moment).<br>
<br><div class="gmail_quote">On Sat, Aug 20, 2011 at 2:06 PM, <<a href="mailto:mkunkel@jlab.org">mkunkel@jlab.org</a>> wrote:<br><blockquote class="gmail_quote">
Johann,<br>
<br>
This question I do not have an answer for your question. I do however know<br>
the answer if you require all 3 to be in same sector, maybe something can<br>
be extrapolated from these.<br>
<a href="http://clasweb.jlab.org/rungroups/g12/wiki/index.php/Yield_Calculation">http://clasweb.jlab.org/rungroups/g12/wiki/index.php/Yield_Calculation</a><br>
date Wednesday, April 19th 2011.<br>
<br>
I can write a simple program to calculate this if you give me till<br>
Tuesday. I have limited internet access right now.<br>
<br>
MK<br>
<div><div></div><div class="h5"><br>
> MK,<br>
> Do you know how often you see two of the tracks in the same sector for p<br>
> pi+<br>
> pi- in the data?<br>
><br>
> This ratio to total number of events seen is very interesting with p K+<br>
> pi-.<br>
> I get 20% of the data events to have the p pi- in the same sector, but its<br>
> 84% in simulations without modelling the trigger which required three<br>
> tracks<br>
> in separate sectors below 3.6 GeV beam energy.<br>
><br>
> I'm going to develop a small function that takes in all the tracks in the<br>
> event and returns true or false based on the trigger logic. Unfortunately,<br>
> we had something like 6 or more different trigger configurations so its<br>
> not<br>
> trivial. But I can make it run dependent I suppose.<br>
> --Johann<br>
><br>
> On Fri, Aug 19, 2011 at 9:50 PM, Michael C. Kunkel <<a href="mailto:mkunkel@jlab.org">mkunkel@jlab.org</a>><br>
> wrote:<br>
><br>
>> On 8/19/11 7:07 PM, Dennis Weygand wrote:<br>
>><br>
>> How does the new gflux do on other cross sections? Did it change by an<br>
>> order of magnitude- isn't that the factor we were off?<br>
>> Can someone comment on this?<br>
>> Dennis<br>
>> On Aug 19, 2011, at 4:29 PM, Johann Goetz wrote:<br>
>><br>
>> Hi g12,<br>
>> I couldn't get this done before the last meeting, but I did a rough<br>
>> total<br>
>> cross section measurement using the most recent gflux data and<br>
>> everything<br>
>> looks pretty good so far. There are a few issues I still need to<br>
>> address,<br>
>> but after certain corrections (the trigger for example) I believe we<br>
>> will<br>
>> have good agreement with older results from CLAS/g1 and SAPHIR.<br>
>><br>
>> Here is a link to the plots on the g12<br>
</div></div>>> wiki<<a href="http://clasweb.jlab.org/rungroups/g12/wiki/index.php/G12_Xi_Paper_-_Lambda_Cross_Sections">http://clasweb.jlab.org/rungroups/g12/wiki/index.php/G12_Xi_Paper_-_Lambda_Cross_Sections</a>><br>
<div class="im">>><br>
>> I used 93 complete runs that were evenly distributed throughout g12 -<br>
>> all<br>
>> production runs (no single sector runs).<br>
>><br>
>> Please mull this over and get back to me with questions on Monday and I<br>
>> can<br>
>> investigate further before the next meeting.<br>
>> Have a good weekend everyone!<br>
>> --<br>
>> Johann T. Goetz, PhD.<br>
>> <a href="mailto:jgoetz@ucla.edu">jgoetz@ucla.edu</a><br>
>> Nefkens Group, UCLA Dept. of Physics & Astronomy<br>
>> Hall-B, Jefferson Lab, Newport News, VA<br>
>> Office: <a href="tel:757-269-5465">757-269-5465</a> (CEBAF Center F-335)<br>
>> Mobile: <a href="tel:757-768-9999">757-768-9999</a><br>
>> _______________________________________________<br>
>> G12 mailing list<br>
>> <a href="mailto:G12@jlab.org">G12@jlab.org</a><br>
>> <a href="https://mailman.jlab.org/mailman/listinfo/g12">https://mailman.jlab.org/mailman/listinfo/g12</a><br>
>><br>
>><br>
>> --<br>
>> Dennis Weygand<br>
>> <a href="mailto:weygand@jlab.org">weygand@jlab.org</a><br>
>> <a href="tel:%28757%29%20269-5926">(757) 269-5926</a> (office)<br>
>> <a href="tel:%28757%29%20870-4844">(757) 870-4844</a> (cell)<br>
>><br>
>><br>
>><br>
>><br>
>><br>
>><br>
>> _______________________________________________<br>
>> G12 mailing<br>
</div>>> listG12@jlab.orghttps://<a href="http://mailman.jlab.org/mailman/listinfo/g12">mailman.jlab.org/mailman/listinfo/g12</a><br>
<div class="im">>><br>
>> I am attempting to verify this with P Rho (PipPim) cross section.<br>
>> Having<br>
>> issues with simulation, hopefully will have result by next meeting.<br>
>><br>
>> MK<br>
>><br>
</div><div><div></div><div class="h5">> _______________________________________________<br>
> G12 mailing list<br>
> <a href="mailto:G12@jlab.org">G12@jlab.org</a><br>
> <a href="https://mailman.jlab.org/mailman/listinfo/g12">https://mailman.jlab.org/mailman/listinfo/g12</a><br>
><br>
<br>
<br>
</div></div></blockquote></div><br><br clear="all"><br>-- <br>Johann T. Goetz, PhD.<br><a href="mailto:jgoetz@ucla.edu">jgoetz@ucla.edu</a><br>Nefkens Group, UCLA Dept. of Physics & Astronomy<br>Hall-B, Jefferson Lab, Newport News, VA<br>
Office: 757-269-5465 (CEBAF Center F-335)<br>Mobile: 757-768-9999<br><br>