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

[Viktor Mokeev]

Dear FX,

 Thank you very much for your very impressive studies!

I am looking into your results and let you know on my comments later on. I am very impressed by your so detailed and the state-of-art analysis code!!

  Best Regards,
                                   Victor
________________________________
From: clas12_rgk <clas12_rgk-bounces at jlab.org> on behalf of Francois-Xavier Girod <fxgirod at jlab.org>
Sent: Sunday, April 26, 2020 5:06 PM
To: clas12_rgk at jlab.org <clas12_rgk at jlab.org>; hybrid baryons <hybrid_baryons at jlab.org>
Subject: Re: [clas12_rgk] [EXTERNAL] Reminder: RGK meeting tomorrow at 8:00 Jlab

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://jlab.bluejeans.com/214576976<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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