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

[Francois-Xavier Girod]

Dear Annalisa

Thank you for the suggestion

I updated my slides with plots showing the generated events with the
condition that both photons were below 35 degrees
There are 60.8k such events, out of 500k generated total

https://clas12-docdb.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=637

Best regards
FX

On Mon, Apr 27, 2020 at 5:19 PM Annalisa D'Angelo <
annalisa.dangelo at roma2.infn.it> wrote:

> 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> 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 Italyemail:annalisa.dangelo at roma2.infn.it
>> Jefferson Laboratory, Newport News, VA USA
>> Email: annalisa at jlab.org
>> Tel: + 39 06 72594562
>>
>> _______________________________________________
>> clas12_rgk mailing list
>> clas12_rgk at jlab.org
>> https://mailman.jlab.org/mailman/listinfo/clas12_rgk
>>
>
> _______________________________________________
> Hybrid_baryons mailing listHybrid_baryons at jlab.orghttps://mailman.jlab.org/mailman/listinfo/hybrid_baryons
>
> --
> ================================================
> Prof. Annalisa D'Angelo
> Dip. Fisica, Universita' di Roma "Tor Vergata"
> Istituto Nazionale di Fisica Nucleare
> Sezione di Roma Tor Vergata, Rome Italyemail: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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