[Rgc_analysis] [Rgc] recent ND3 runs cooked in HBT model for inclusive asymmetry check

[Nathan Baltzell]

Hello Everyone,

As you probably know, this "trigger dilution" factor is really just an empirical thing to scale the charge-corrected trigger-bit asymmetry to be what you want for online monitoring.

Ideally it's to satisfy this:

P_offline = H * A_c_offline
P_trigger = T * H * A_c_trigger
P_offline = P_trigger

Where H is all the beam-polarization/target-diluation/acceptance/etc factors wrapped into on, named "H" just because I got it from Harut originally,.  And A_c is the charge-corrected asymmetry.  And T is the trigger dilution (which we/I assume must be independent of target type for our purposes).

*** So to get T, we ideally need either A_c_offline measured (although P_offline will also work, just more tedious).  And if H has changed relative to 2022's no-FT, then we need that recalculated too, one for each target.

*** Or, we can forget all that, and you can instead just tell me what to set them to, without a real offline analysis.  But you probably want to avoid changing it regularly, because that might make it difficult to interpret the archived trigger polarization later on.  

-Nathan


> On Feb 4, 2023, at 11:54 AM, silvia at jlab.org wrote:
> 
> Hi Sebastian,
> Just for completeness, these data were cooked with electron trigger mask
> and in HBT mode, in order to speed up the cooking.
> Best regards,
> Silvia
> 
> 
>> Hi Harut and Nathan,
>> 
>> it would be great if you could use these runs to re-calibrate the
>> â?otrigger dilutionâ? for trigger bit 29. In addition, I hope that Harut
>> and/or Greg can use these runs to extract our best guess for the
>> â?otrueâ? target polarization, assuming a beam polarization of 0.81.
>> 
>> Thanks - Sebastian
>> 
>> Begin forwarded message:
>> 
>> From: Silvia Niccolai via Rgc <rgc at jlab.org<mailto:rgc at jlab.org>>
>> Subject: [Rgc] recent ND3 runs cooked in HBT model for inclusive asymmetry
>> check
>> Date: February 4, 2023 at 10:45:18 AM EST
>> To: rgc at jlab.org<mailto:rgc at jlab.org>,
>> rgc_analysis at jlab.org<mailto:rgc_analysis at jlab.org>
>> Reply-To: silvia at jlab.org<mailto:silvia at jlab.org>
>> 
>> Dear all,
>> Kayleigh has just cooked 4 recent ND3 runs (17493, 17494, 17496, 17497)
>> in
>> HBT, to allow for the inclusive-asymmetry extraction of the target
>> polarization. This will be very useful to calibrate the online trigger
>> asymmetry.
>> The runs can be found at:
>> /volatile/clas12/rg-c/production/dst/8.5.0_HBT/
>> Best regards,
>> Silvia
>> 
>> 
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>