sPHENIX HCal discussion

[Stefan Bathe <stefan.bathe AT baruch.cuny.edu>]

Hi Emma,

Very nice slides!  I have a few comments/questions:

Comments:

slide 4:  what you call “MB" on this slide (and on following slides) should 
really be called “peripheral”, I think (according to the centrality 
distribution shown, which peaks around 70 %, so b ~ 12 fm.—MB really means as 
close as you can get experimentally to 0-100%).

slide 7:  right figure:  would a plot be better to illustrate (lego, box, or 
colz)?

Questions:

slide 6:  the reason E/p is not 1 for the calorimeter system (black curve) is 
that the HCals are calibrated at the EM scale in the sPHENIX simulations, is 
that correct?  Are these showers selected to start in the oHCal?  Why is 
there then a difference between red and black?

slide 7:  the percentage (0.013) and words (oHCal shower candidate) suggest 
these are showers that start in the oHCal (the 23.9 % on slide 5).  So the 
difference in E/p between red and black comes from the underlying event in 
Pythia?  But it looks similar to the difference on slide 6, where there is no 
underlying event.

Best regards,
Stefan
- 
---------------------------------------------------------------------------------
Stefan Bathe
Professor of Physics
Baruch College, CUNY
and RIKEN Visiting Scientist

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> On Oct 21, 2022, at 16:56, Emma Grace McLaughlin via sPHENIX-HCal-l 
> <sphenix-hcal-l AT lists.bnl.gov> wrote:
> 
> Hi all,
> 
> I am presenting on single hadron calibrations of the HCal at the DNP on 
> Saturday 10/29/22. Attached are a draft of my slides. Comments and 
> suggestions are appreciated. 
> 
> Thanks,
> Emma McLaughlin
> <DNP.pdf>_______________________________________________
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