Star-tpc-l mailing list

["Van Buren, Gene" <gene AT bnl.gov>]

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>