[Halld-offline] Data Challenge Meeting, Nov. 19, 1:30 pm, F326

[Richard Jones]

Mark and all,

To make this background dataset of maximum practical use to people studying analysis of select channels, I propose that we generate with the background from out-of-time photons eanbled in the simulation.  This means including the following three extra cards in control.in (in conditions)

BEAM 12. 9.
BGRATE 1.10
BGGATE -100. 200.

The rate in BGRATE is normalized for running at 10^7 intensity in the polarized peak.  I know that developers of reconstruction code may want artificially clean events, but those people are not going to be interested in looking at samples of 10^10 events.  What this adds is mainly EM background tracks, but it also includes some of the dominant hadronic channels (eg. Delta production at low energy, rho photoproduction at higher energies) coming from out-of-time photons interacting in the target (and elsewhere).  It would be nice for someone studying a low-rate reaction like a rare eta decay channel to be able to say that they included known backgrounds from accidental pile-up at some level.

-Richard J.





On 11/18/2012 5:11 PM, Mark M. Ito wrote:
> Find the meeting page below and at
>
> https://halldweb1.jlab.org/wiki/index.php/GlueX_Data_Challenge_Meeting,_November_19_2012
> ___
>
>      GlueX Data Challenge Meeting
>      Monday, November 19, 2012
>      1:30 pm, EST
>      JLab: CEBAF Center, F326/327
>
> Agenda
>
>       1. Announcements
>       2. [5]Minutes from last time
>       3. [6]Conditions for DC-1
>       4. JLab Farm Mini-Challenge Status
>       5. Grid status
>       6. CMU status
>       7. New action items
>
> Meeting Connections
>
>      To connect from the outside:
>       1. ESNET:
>             + Call ESNET Number 8542553 (this is the preferred connection
>               method).
>       2. Phone: (should not be needed)
>             + +1-866-740-1260 : US and Canada
>             + +1-303-248-0285 : International
>             + then use participant code: 3421244# (the # is needed when
>               using the phone)
>             + or www.readytalk.com
>                  o then type access code 3421244 into "join a meeting" (you
>                    need java plugin)
>       3. EVO:
>             + A conference has been booked under "GlueX" from 1:00pm until
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>             + [7]Direct meeting link
>             + To phone into an EVO meeting, from the U.S. call (626)
>               395-2112 and then enter the EVO meeting code, 13 9993
>                  o Instructions for the [8]Phone Bridge to EVO.
>             + [9]Skype Bridge to EVO
>
>      Retrieved from
> "https://halldweb1.jlab.org/wiki/index.php/GlueX_Data_Challenge_Meeting,_November_19_2012"
>
> References
>
>      5.
> https://halldweb1.jlab.org/wiki/index.php/GlueX_Data_Challenge_Meeting,_November_5,_2012#Minutes
>      6.
> https://halldweb1.jlab.org/data_challenge/01/conditions/data_challenge_1.html
>      7.
> http://evo.caltech.edu/evoNext/koala.jnlp?meeting=e8eteDvlv9avaBIIasI8
>      8.
> http://evo.caltech.edu/evoGate/Documentation/extclient/telephone/telephone.html
>      9.
> http://evo.caltech.edu/evoGate/Documentation/extclient/skype/skype.html
>


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