[Rgc] [EXTERNAL] Re: [Rgc _analysis] Host needed for tomorrow’s RGC-analysis meeting

[tforest at jlab.org]

Tim:

My two questions would be.

1.) Do we want to throw away events with large beam current changes?

2.) How should the uncertainty in the FC be propagated?

Normalizing using the FC relies on linearity of the CLAS12 detector. 
Cutting away helicity blocks with large current fluctuations restricts
this dependence to a smaller range.  Even with a FC>100 counts cut
(https://clasweb.jlab.org/wiki/index.php/File:R16330FC.png), I see "
shoulders" on the FC asymmetry that cause the mean of the asymmetry
distribution to shift sign compared to the mean from a Gaussian fit.

https://clasweb.jlab.org/wiki/index.php/File:FCasym_16330_7-15-23.png

Should we have a cut on the current?



> Hi Tony,
>
> Can you explain a little more what you mean? Normalizing the event counts
> or what?
>
> Regards,
> Tim
>
>> On Aug 7, 2023, at 5:02 PM, tforest--- via Rgc_analysis
>> <rgc_analysis at jlab.org> wrote:
>>
>> *Message sent from a system outside of UConn.*
>>
>>
>> Should we start a discussion about normalizing with a fit to the FC
>> asymmetry or with the average determined using the FCup_reading.cc
>> program?
>>
>> I noticed that the values for the asymmetry can differ by sign.
>>
>>
>>> Dear all,
>>> I will be traveling tomorrow (Tue) at RGC-analysis time (8:30AM JLab
>>> time). If Sebastian can please host it, let him know if you have
>>> anything
>>> to present, and add it to our wiki.
>>> IâEUR(tm)ll be once again available from next week onwards, apologies
>>> for the
>>> inconvenience.
>>> Best regards.
>>> Silvia
>>>
>>>
>>> Sent from my iPhone
>>>
>>> _______________________________________________
>>> Rgc mailing list
>>> Rgc at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/rgc
>>>
>>
>>
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>