sPHENIX is a new detector at RHIC.

["Osborn, Joe" <osbornjd AT ornl.gov>]

Adding the full sPHENIX-l list to this discussion about my talk at the RHIC AUM tomorrow.

 

Joe Osborn

 

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

 

Joe Osborn, Ph.D.

Associate Research Scientist

Oak Ridge National Laboratory

osbornjd AT ornl.gov

(859)-433-8738

 

 

From: Osborn, Joe <osbornjd AT ornl.gov>
Date: Tuesday, June 7, 2022 at 10:02 AM
To: Perepelitsa, Dennis <dvp AT bnl.gov>
Cc: sphenix-cold-qcd-l AT lists.bnl.gov <sphenix-cold-qcd-l AT lists.bnl.gov>
Subject: Re: [Sphenix-cold-qcd-l] cQCD sPHENIX AUM Talk Draft

Hi Dennis,

 

Thanks for the comments, I attached an updated draft with some changes implemented. A few comments to your comments are below.

 

Joe

 

 

> Several of the Figures look a bit blurry - particularly the first image on slide 4 and both “versions" of slide 11. Can you step through and try to improve the quality?

 

I’ll try to get the actual png files from slide 11 – these were just screen shots from the spin/cQCD talk at AUM 2021.

 

> slide 9: do you want to say something about why it will be interesting to measure both D0 vs D0bar separately, or will it be obvious to the ColdQCD crowd? 

 

I plan to verbally say this, which is what motivated the charge separated OHF decay electron measurement from PHENIX.

 

> second version of slide 11: similarly, it would be nice to have some context for how impactful this measurement would be. is there a “latest and greatest” version of this observable to show how much smaller our projected uncertainties are? and what is the physics benefit of measuring vs. rapidity within our range? (and where did these plots come from…)

 

These plots came from a projection study that was done last year, I believe, to look at what our statistical projections would be for an observable similar to the STAR observable in the first “animation” of this slide. We will be able to push to higher jet pT, so the measurements aren’t exactly comparable. The physics benefit of measuring vs. rapidity is like most single spin asymmetries – they are expected to be larger at more forward rapidities. The STAR measurement shows a charge separation which is predicted due to differences in the asymmetry from up/down quarks which are largely canceled out in a purely inclusive measurement, and your up/down fraction changes as you swing around in rapidity.

 

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

 

Joe Osborn, Ph.D.

Associate Research Scientist

Oak Ridge National Laboratory

osbornjd AT ornl.gov

(859)-433-8738

 

 

From: Perepelitsa, Dennis <dvp AT bnl.gov>
Date: Monday, June 6, 2022 at 5:53 PM
To: Osborn, Joe <osbornjd AT ornl.gov>
Cc: sphenix-cold-qcd-l AT lists.bnl.gov <sphenix-cold-qcd-l AT lists.bnl.gov>
Subject: [EXTERNAL] Re: [Sphenix-cold-qcd-l] cQCD sPHENIX AUM Talk Draft

Hi Joe,

 

Thanks for circulating these nice draft slides.

 

Please consider some comments below from me.

 

Dennis

 

— 

 

If you have timed your talk and find that you are running long, you might cut some of the first several “sPHENIX overview and status” slides. Your talk is in a topical workshop and the broader status will be covered by our plenary talk on Thursday (which you could even reference on your own slides).

 

Several of the Figures look a bit blurry - particularly the first image on slide 4 and both “versions" of slide 11. Can you step through and try to improve the quality?

 

slide 8: to better illustrate the dramatic improvement in this measurement with sPHENIX, can you take the data points on the first slide 8 and super-impose them on the second version of slide 8? Then it is much easier to see than by switching back and forth. You could also do a similar thing for slide 9, although there the final states are different (HF electron vs. reconstructed D). 

 

slide 9: do you want to say something about why it will be interesting to measure both D0 vs D0bar separately, or will it be obvious to the ColdQCD crowd? 

 

second version of slide 11: similarly, it would be nice to have some context for how impactful this measurement would be. is there a “latest and greatest” version of this observable to show how much smaller our projected uncertainties are? and what is the physics benefit of measuring vs. rapidity within our range? (and where did these plots come from…)

 

slides 13-14: There was a nice study by Sebastian Tapia and John Lajoie on projections for Energy-Energy Correlators (EECs) in p+A jets in sPHENIX: https://indico.bnl.gov/event/15500/contributions/63589/attachments/41083/68843/sphenix%20flash%20talk%20tapia-lajoie.pdf . You could show one of these projections, which I think we have also shown at DIS, as an example of another specific measurement sensitive to the parton->hadron transition that we’ve been thinking about.

 

On Jun 6, 2022, at 2:09 PM, Osborn, Joe via sPHENIX-cold-QCD-l <sphenix-cold-qcd-l AT lists.bnl.gov> wrote:

 

Hi sPHENIX Cold QCDers,

 

I was asked to give a talk on the sPHENIX spin and cQCD program at the AUM on Wednesday morning. A draft is attached, any comments/suggestions are welcome.

 

Joe Osborn

 

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

 

Joe Osborn, Ph.D.

Associate Research Scientist

Oak Ridge National Laboratory

osbornjd AT ornl.gov

(859)-433-8738

 

<sPHENIXcQCDAUM2022.pdf>_______________________________________________
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Dennis V. Perepelitsa

Assistant Professor, Physics Department

University of Colorado Boulder

 

 

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