sPHENIX discussion of physics

["Perepelitsa, Dennis" <dvp AT bnl.gov>]

Hi Xuan,

Thanks for circulating your slides for the IS conference. Please consider some comments from me below.

Slide 6: since we don’t have a separate talk on the quarkonia program, you could mention here that another great usage for the calorimeters is the Upsilon->di-electron channel 

Slide 7, right plot: there is nothing wrong with showing this, but you could consider picking something from the more recent test beam paper: https://ieeexplore.ieee.org/document/9321702 .  The
 plot you are showing uses an older version of the EMCal prototype design.

Slide 8: we may potentially hope to have some approved plots from INTT (or perhaps even MVTX?) depending on how things go in the next few days in 1008. Those might be more natural to show for the HF focus than calorimeter-related plots, if we have them.

Slide 9: you could consider moving this to just after slide 3. It comes quite late for a high-level physics motivation, in my opinion… 

Slide 11: somehow the Upsilon symbols have been rendered as gammas here 

Slide 12, left and center: the plots here look a bit “grainy” to me if I zoom in — any possibility to go back to the BUP PDF and get high-resolution versions? 

Slide 12, right plot: can you replace this with the “official” version we have in Fig D.4, page 54 of the BUP 2022: https://indico.bnl.gov/event/15148/attachments/40846/68568/sPHENIX_Beam_Use_Proposal_2022.pdf  

Slide 13: for the b-jet z_g projection plot, that prediction by Li and Vitev is actually a quite interesting one. They argue that there is a unique kinematic range at RHIC energies where one might expect the b-jet sub-structure to be more strongly modified
 than for light jets (!), and sPHENIX could in principle measure that. Not sure you have the time/space, but that could be a nice detail to make slide 13 a bit more exciting, since otherwise it is just a bunch of projections with not too much specific commentary. 

Slide 15: maybe “started collecting 200 GeV Au+Au data” -> “started commissioning with beam” ? Since we are not taking physics data right now…

Slide 15: we might want to be a bit careful with our phrasing around the “first Upsilon(3S) measurement” at RHIC, given STAR’s recent exclusion limit. Maybe “first potential observation of surviving Upsilon(3S)” or similar?

Dennis 

On Jun 3, 2023, at 8:51 PM, xuanlipx via sPHENIX-HF-jets-l <sphenix-hf-jets-l AT lists.bnl.gov> wrote:

Dear All,
     I have updated the slides with the approved sPHENIX performance 
plots and please see the current draft in the following link,

https://drive.google.com/file/d/1Pe21Yu9jocSb4F8YOYVf1q0d4xFHLeBr/view?usp=share_link

     Suggestions and comments are very welcome!
     Thanks.
                                                           Xuan

On 2023-06-02 19:02, xuanlipx via sPHENIX-HF-jets-l wrote:

Dear All,
     I will present the "Heavy flavor physics at the sPHENIX
experiment" talk in the upcoming Initial Stages 2023 conference from
June 19 and 23 in Denmark. The talk agenda is not finalized yet and
this talk is scheduled for 20 minutes, which I assume it's either for
15+5 minutes or 17+3 minutes. I reference several recent excellent
talks and the nicely written sPHENIX BURs and notes. Please see the
draft slides in the following link,

https://drive.google.com/file/d/1ymtcVsvGy2j-_-pyPIygJUKF-j-XYoG2/view?usp=share_link

     Suggestions and comments are very welcome!
     Thanks.

Xuan

-- 
Xuan Li
A109, Bldg. 1, TA-53
Physics Division, MS H846
Los Alamos National Laboratory
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Dennis V. Perepelitsa
Associate Professor, Physics Department
University of Colorado Boulder
on sabbatical at Brookhaven National Laboratory