sPHENIX is a new detector at RHIC.

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

Hi Anders,

Thanks for circulating these slides so far in advance.

Since the audience at WWND is really a heavy ion knowledgable one, my general comment is to lean a bit more into the unique capabilities of sPHENIX, with some specific examples/ideas below.

Slide 2: your opening description of sPHENIX is as “An upgrade of the PHENIX detector” - that is a dramatic underselling of our experiment! I like your second bullet point, and also some of the phrasing in the Conclusion slide better. You could say - sPHENIX has purpose-built capabilities never before available at RHIC, and the community has agreed this is the tool needed to finish the scientific mission of the facility.

Slide 3: I think this 3-d rendering / engineering drawing of the experiment might be one of the older ones. Dave Morrison maintains the latest and greatest ones here: https://bnlbox.sdcc.bnl.gov/index.php/s/tDHkYzzETHfaLJE - maybe there is a better-looking replacement?

Slide 4: is “pile-up separation” redundant with "Single-beam-crossing timing resolution”?

Slide 17: while the ColdQCD program is an important part of our physics program, it’s not one relevant for 2023 data. On the other hand, we do have a relatively-recently formed Bulk QCD TG, which will be quite relevant in 2023 data (and is a physics interest of many WWND attendees). You could consider a modified version of your slide similar to my slide 5 here: https://indico.bnl.gov/event/17532/contributions/70177/attachments/44507/75108/dvp-AsiaMeeting-11-17-22.pdf 

Slide 18: not only will we have overlap with the LHC, we’ll also have access to new, kinematic regimes unable to be explored at the LHC

Slide 19: I would write “Jet (sub)-structure” more generically than just specifically grooming procedures. I would also consider saying “explore how energy loss depends on the parton shower” (?) rather than “explore evolution of the parton shower”, which sounds like something that should be done just in p+p

Slide 22: we also hope to do some full B-hadron reconstruction, not just through non-prompt D0’s 

Slide 24: again, “Improved statistics w.r.t. PHENIX” seems to undersell things. How about “apply unique sPHENIX capabilities to greatly expand on previous PHENIX measurements” - ?

Finally, since WWND is really an HI-specific workshop and you have 25 minutes, if you want, you could consider picking 1-2 topics that you are personally excited about and going into a bit more detail. For example, given your quarkonia background, you could show a slide with the unexpected CMS Upsilon(3S) results, where different theoretical models disagree quite a bit. You could say that a key piece of information which may help to understand this, would be an independent measurement at RHIC energies. (Or some other topic - just thinking out loud - J/psi in jets in p+p?)

Dennis

On Jan 23, 2023, at 8:00 AM, Anders Knospe via sPHENIX-l <sphenix-l AT lists.bnl.gov> wrote:

Dear sPHENIX collaborators,

I have uploaded the first draft of my talk at the upcoming Winter Workshop on Nuclear Dynamics, titled "sPHENIX: Status and Plans". The location is below. My presentation will be some time during the week of February 6. Thanks in advance for your comments.

https://indico.bnl.gov/event/18080/

--

Anders Knospe
Assistant Professor
Department of Physics
Lehigh University
16 Memorial Drive East
Bethlehem, PA 18015, USA

Office: 412 Lewis Lab
Phone: +1 610 758 6431 (86431 on campus)
Pronouns: he/him

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Dennis V. Perepelitsa
Associate Professor, Physics Department
University of Colorado Boulder
on sabbatical at Brookhaven National Laboratory