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[Chenliang Jin <cj17 AT rice.edu>]

Hi Gene,

It seems there is no ZDC rate dependence for mass splitting which is similar 
as Run21 OO datasets. Here are the plots of mass2 vs. zdc rate. I hope it can 
help.

Sincerely,
Chenliang

> On Dec 13, 2024, at 1:03 PM, Van Buren, Gene <gene AT bnl.gov> wrote:
> 
> Hi, Chenliang
> 
> Thank you for the plots! One quick observation is that uncalibrated 
> SpaceCharge introduces a notable shift in mass^2; a shift of some sort is 
> to be expected.
> 
> And one quick request: mass2 splitting vs. luminosity (like zdc coincidence 
> rate) for the two recent 19.6 GeV calibration productions? There is a 
> smaller range of luminosity in 14.5 GeV, so probably not worth looking for 
> it there.
> 
> If you can do this, thanks,
> -Gene
> 
>> On Dec 13, 2024, at 12:36 PM, Chenliang Jin <cj17 AT rice.edu> wrote:
>> 
>> Dear Gene,
>> 
>> I checked both Run19 14.6GeV and 19.6GeV dataset produce this week. 
>> Charged particle mass splitting is observed again similar as Run21 OO 
>> 200GeV at two 19.6GeV (w./w.o. EB correction) and 14.6GeV data sample. The 
>> mass splitting at 19GeV without EB correction (produced in Dec.) is 
>> smaller than 19GeV dataset with EB correction (produced in Nov.). The mass 
>> splitting of 14GeV is slightly below the splitting of 19GeV with EB 
>> correction. 
>> 
>> Here is the mass splitting plot and you can find more detail information 
>> from the slides in the attachment.
>> 
>> Sincerely,
>> Chenliang
>> 
>> <PastedGraphic-1.png>
>> <BTOF calibration for Run19 dataset with new TPC alignment.pdf>
>