sPHENIX discussion of physics

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

Hi all,

Just to elaborate a bit more on Cameron’s good point here: 

• Maybe some people think that’s bad to only get to [65%] but its more open HF data than RHICs had recorded before, and we were originally going to record the open HF data over 5 months but we did [65%] in a little over 1 month. I think there are ways we can emphasize the success of the run and how we operated beyond our predictions.

The measurement that STAR uses for their open heavy flavor baseline in p+p collisions is this one: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.86.072013 - which uses 105M minimum-bias p+p events.

By contrast, 2.9/pb streaming data corresponds to ~100B (not a typo - “B” vs “M”) minimum-bias p+p events. So getting to “only” 65% of our original goal (which, again as Cameron has mentioned, has happened impressively quickly), still leaves us with a multiple-orders-of-magnitude improvement of the current RHIC best, at least in this particular channel.

Dennis

On Oct 2, 2024, at 7:08 AM, Cameron Thomas Dean <cameron.dean AT cern.ch> wrote:

Sorry, a correction from what I wrote:

We reached 30% of the integrated lumi for the Upsilon program and 65% for the open HF program.

Cheers,

Cameron

On 2 Oct 2024 08:38, Cameron Thomas Dean <cameron.dean AT cern.ch> wrote:

Hi Xuan,

Thanks for the updated slides. In general, I think they’re really good and will give a good overview of our HF jet program. I have a few small comments:

• On slide 6, the INTT z vertex plot is very blurry for me. Maybe it’s an artifact of the upload, I’ve seen this before, but we should check that it is clear for the presentation. I would also emphasize on the plot that this is INTT-only with a label.

 

• On slides 7 and 8, the plots are also blurry so we should just double check that the resolution is OK.

 

• Slide 8, you have the same comment twice “Use D0 tagged jets to study charm jet kinematics”. You could remove the repeat from the second instance which may give you more space to play with or could emphasize your point stronger.

 

• Slide 9, “Calorimeter + full tracking system is projected to reach ~30% of BUP24 luminosity” you could probably say that we did reach 30% of the luminosity for the open HF program. Maybe some people think that’s bad to only get to 30% but its more open HF data than RHICs had recorded before, and we were originally going to record the open HF data over 5 months but we did 30% in a little over 1 month. I think there are ways we can emphasize the success of the run and how we operated beyond our predictions.

 

• Slide 10, Maybe we could rephrase “All sPHENIX detectors are under operation for the 2024 p+p physics data taking.” To something like “All sPHENIX detectors operated successfully for the 2024 p+p physics data taking.” Or “All sPHENIX detectors are under operation for the 2024 AuAu commissioning period”, or something like this?

 

• “The heavy flavor jet tagging algorithm have been developed in the sPHENIX software and will optimized in real data.”, I think should be “The heavy flavor jet tagging algorithms have been developed in the sPHENIX software and will be optimized in real data.”

 

Have a great time at DNP!

Cheers,
Cameron

 

From: sphenix-hf-jets-l-request AT lists.bnl.gov <sphenix-hf-jets-l-request AT lists.bnl.gov> on behalf of xuanlipx <xuanlipx AT rcf.rhic.bnl.gov>
Date: Wednesday, October 2, 2024 at 1:27 AM
To: sphenix-hf-jets-l AT lists.bnl.gov <sphenix-hf-jets-l AT lists.bnl.gov>, Sphenix-upsilons-l AT lists.bnl.gov <Sphenix-upsilons-l AT lists.bnl.gov>
Cc: sphenix-physics-l AT lists.bnl.gov <sphenix-physics-l AT lists.bnl.gov>
Subject: Re: [[Sphenix-hf-jets-l] ] DNP2024 - sPHENIX HF jet talk draft

Dear All,
      Please see the updated talk draft about the sPHENIX HF jet studies
in the following:
  
https://indico.bnl.gov/event/24884/contributions/96807/attachments/57372/98997/APS_DNP2024_XuanLi_v3.pdf

      I include the latest integrated luminosity plot for run24 p+p
collisions posted by Jamie.
      Suggestions and comments are very welcome!
      Thanks.
                                                    Xuan

On 2024-09-20 15:52, xuanlipx wrote:
> Dear All,
>      Thanks a lot for the great suggestions for my DNP2024 talk draft
> about the sPHENIX heavy flavor jet study. The talk is scheduled for
> 10+2 minutes. Please see my updated talk draft below:
>
> https://indico.bnl.gov/event/24884/contributions/96807/attachments/57372/98643/APS_DNP2024_XuanLi_v2.pdf
>
>      Further suggestions and comments are very welcome!
>      Thanks.
>                                                Xuan

--
Xuan Li
A109, Bldg. 1, TA-53
Physics Division, MS H846
Los Alamos National Laboratory

Dennis V. Perepelitsa
Associate Professor, Physics Department
University of Colorado Boulder