sPHENIX is a new detector at RHIC.

["Sickles, Anne M" <sickles AT illinois.edu>]

Hi Justin,

Nice slides!  I’m sure it will be a great talk and I just had a couple of comments:

—overall the slides are fuzzy (like the sPHENIX logo at the top of the slides).  Is that some issue with creating the pdf that can be optimized?

—slide 6: when you discuss the calorimeters, you’re right that it’s novel technology but I think it would be very good to mention the testbeam papers which show that we have it under control

—slide 9: I would remove the last bullet.  I don’t think that we gain anything by setting up a tension between sPHENIX and the EIC.  We have a run plan that fits into the EIC schedule.

—slide 8/23: you correctly state when we’re taking data but it’s getting so close it might be worth highlighting “data taking in less than two years!” to really convey the excitement and maturity of the project.

—slide 23:  “pandemic delays have been mitigated” I would highlight this more.  We’ve been able to keep the construction at many institutions on track during a global emergency due to extraordinary work by many people.

Best,

Anne

---------------------------------------------------------

Anne Sickles

Associate Professor

University of Illinois at Urbana Champaign

sickles AT illinois.edu

---------------------------------------------------------

On Apr 12, 2021, at 10:48 PM, Perepelitsa, Dennis <dvp AT bnl.gov> wrote:

Hi Justin,

Thanks for sending out the draft. I do appreciate how you are trying to particularly “aim” the talk towards the a more GHP-like/EIC-interested crowd.

I had a few suggestions: 

somewhere on slides 5, 9, or 10, you could mention the high daq rate and that one can use the hermetic calorimeter system for unbiased jet triggering in p+p - since those really enable the physics program you talk about in the following slides

slide 9: the “sPH-TRG-2020-001” label may be a bit mysterious since we don’t really have a well-publicized central page of sPHENIX notes. You might therefore make that a hyperlink to: https://urldefense.com/v3/__https://indico.bnl.gov/event/7881/attachments/30176/47160/sPH-TRG-2020-001.pdf__;!!DZ3fjg!s1hbHyXYZcziwauB5h_6AzhV30GcUio-kd0L40NMFktWaAn-l6Kv3YLHQtLj48yJ2g$  

slide 10: “50 GeV” -> “40 GeV” - let’s not set the expectation we will have 50 GeV photons! 

slide 12: is it worth adding that this is also a potentially useful channel for in situ jet calibration?

slide 13: you might stress that the unfolding for the case in the lower left would thus only be for the “p+p”-like response. That is, there are kinematic regions & observables we can pick where the additional UE effects are strongly sub-dominant to just the “p+p”-like part - those are great for “Day-1” measurements! 

slide 14: if you want a bit more physics, you could mention that due to the low jet pT reach, one will have sub-jets much closer to medium scales (i.e. than at the LHC)! So sPHENIX can work in this very interesting regime where the vacuum emissions star to compete with medium emissions.

slide 16: you might add a HF hadron v2 plot here. Even though you would have one plot with jets and one with hadrons, it would show that sPHENIX can simultaneously address the RAA & v2 for heavy flavor in a comprehensive program.

Dennis

On Apr 11, 2021, at 10:20 PM, Frantz, Justin <frantz AT ohio.edu> wrote:

Hello,

I will be giving an sphenix overview talk at the APS GHP21 Group on Hadronic Physics topical group meeting this Wednesday at 3:50pm.

An initial draft, which borrows heavily from several recent talks on the topic especially Caroline Reidl's AUM talk,  is linked below.  It still needs much superficial work but the slide topics and flow (modulo some cutting) and plots choices are fairly finalized.   

More importantly, although it is a parallel talk in a Heavy Ion section, since this is GHP I'm preparing it with the idea that it might include a few different audience members than usual, e.g. some medium energy/Jlab folks.  With this in mind and the EIC work ramping up, ECCE, etc, I'm treating it as it may represent an opportunity to spotlight ourselves to our "new cousins", so I have tried to emphasize some parts in that direction, such as:

-Slightly more explanation than usual of QGP physics (that part is the most incomplete but there are place holders)
-An emphasis on cold QCD with sphenix
-Some comments related to the interaction between sphenix and the EIC schedule
-ECCE advertisement

These parts of the talk are fairly developed and are the parts I am most interested in receiving comments about.  The superficial stuff e.g. typos, plot qualities, layout on  many slides, please do not comment on yet, I will be updating the folder as Wed approaches with fixes to those.  I AM very interested in non-obvious important points not mentioned on any of the slides that you think should be added for any part of the talk.  

Current talk draft: 
https://urldefense.com/v3/__http://www.phy.ohio.edu/*frantz/ghp21_sphenix/jfrantz_ghp21_sphenix_experiment_041421_draft2.pdf__;fg!!P4SdNyxKAPE!RYgHx-M18opvW29rEDuzZ1iKKA8tP9mlEiNmmvoIKFIJF437Rb49diTQ2ZEZ4C97XVeuiw$ 

Parent Folder where new draft numbers will also appear 
https://urldefense.com/v3/__http://www.phy.ohio.edu/*frantz/ghp21_sphenix/__;fg!!P4SdNyxKAPE!RYgHx-M18opvW29rEDuzZ1iKKA8tP9mlEiNmmvoIKFIJF437Rb49diTQ2ZEZ4C9rvt4sXA$ 

Thanks!
-Justin



----------------------------------------------
Justin Frantz, Ph. D.  
RHIC/AGS User Executive Committee
Brookhaven National Lab
Associate Professor
Ohio University Dept. Of Physics and Astronomy   
frantz AT ohio.edu   
646-228-2539  
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Dennis V. Perepelitsa
Assistant Professor, Physics Department
University of Colorado Boulder



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