[clas12_rgk] [Hybrid baryons] [EXTERNAL] Reminder: RGK meeting tomorrow at 8:00 Jlab

[Annalisa D'Angelo]

Great Job FX!

do you have and estimate of the fraction of simulated events for which 
both photons are emitted at angles lower than 35 degrees in the 
laboratory frame?
How does it compare with your final number of 15 K reconstructed events 
and 10K of clean exclusive events?

All the best
Annalisa
Il 26/04/20 23:06, Francois-Xavier Girod ha scritto:
> Dear all
>
> As a follow up from Friday's meeting, Anna agreed to provide me with 
> her eppi0 simulation files so I can take a look with my code
>
> I posted some slides summarizing my findings on the docDB page here
> https://clas12-docdb.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=637
>
> I think that most of the background Anna observed comes from photons 
> generated by the electron bremsstrahlung
> One can mostly remove all this background with a simple cut on the 
> angle between electron and photon > 7 degrees
> The generated kinematics indicates that such a cut should be fine
>
> In addition I applied a set of exclusivity cuts similar to what I used 
> for the deep pi0 selection
> Note that the values of these cuts should be adjusted for the analysis 
> of the data, but overall I expect they would help clean up the 
> backgrounds from other reactions as well
>
> In general it seems prudent to remove photons around the electron 
> direction, unless one is directly interested in bremsstrahlung events
>
> Best regards
> FX
>
>
> On Thu, Apr 23, 2020 at 7:52 PM Annalisa D'Angelo 
> <annalisa.dangelo at roma2.infn.it 
> <mailto:annalisa.dangelo at roma2.infn.it>> wrote:
>
>     Dear All,
>
>     this is a reminder of tomorrow RGK meeting at 8:00 am Jlab time.
>
>     The bluejeans link is:
>
>     https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab.bluejeans.com_214576976&d=DwIDaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=t2OnxVoP8YJyzuxpHKwj1tmrMj6s1mZ4pgV16sZJZb8&m=2x6Rz7nmMcr0otRW3gNkLLB6nDGL8K5nq3Wz5UBDBfo&s=2kdeL_2GfI2y8ZYF8Oe17KMEN9z8wEiThsIFuWB19mY&e= 
>     <https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab.bluejeans.com_214576976&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=t2OnxVoP8YJyzuxpHKwj1tmrMj6s1mZ4pgV16sZJZb8&m=Xv8He5Zu2WrGWdLaLCq_bbPgPtJyiHCbvGjBnZJp-3w&s=D1duBcnVCXxtVPUS7bfmvQQ1grPEM014tffjotoLbFw&e=>
>
>
>     All the best
>
>     Volker and Annalisa
>
>     -- 
>     ================================================
>     Prof. Annalisa D'Angelo
>     Dip. Fisica, Universita' di Roma "Tor Vergata"
>     Istituto Nazionale di Fisica Nucleare
>     Sezione di Roma Tor Vergata, Rome Italy
>     email:annalisa.dangelo at roma2.infn.it  <mailto:email:annalisa.dangelo at roma2.infn.it>  
>     Jefferson Laboratory, Newport News, VA USA
>     Email:annalisa at jlab.org  <mailto:annalisa at jlab.org>
>     Tel: + 39 06 72594562
>
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-- 
================================================
Prof. Annalisa D'Angelo
Dip. Fisica, Universita' di Roma "Tor Vergata"
Istituto Nazionale di Fisica Nucleare
Sezione di Roma Tor Vergata, Rome Italy
email:annalisa.dangelo at roma2.infn.it
Jefferson Laboratory, Newport News, VA USA
Email: annalisa at jlab.org
Tel: + 39 06 72594562

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