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HPS Collaboration Meeting

→ US/Eastern
CEBAF Center F326-327 (Jefferson Lab)

CEBAF Center F326-327

Jefferson Lab
Cameron Bravo (SLAC), Mathew Graham (SLAC National Accelerator Laboratory), Maurik Holtrop (UNH), Stepan Stepanyan (Jefferson Lab), Timothy Nelson (SLAC)
Description

The Heavy Photon Search (HPS) collaboration will have its semi-annual meeting at Jefferson Lab from June 3 to June 5, 2024. Collaboration is busy with calibrating and aligning the 2019 and 2021 physics run data, preparing for the next run, and pursuing various physics analyses. At this meeting, we will hear updates from different working groups. We expect presentations on the progress of searches of canonical dark photons and other long-leaved particles, such as SIMPs and iDM. The business session of the meeting includes updates from the Presentation and Publication and The Executive committees (PPC and EC).

https://misportal.jlab.org/Ul/conferences/generic_conference/participants.cfm?conference_id=HPS_2024

 

Zoom: https://jlab-org.zoomgov.com/j/1605586280?pwd=cG5IV01hRE05WjNRcVAySXZ5WjJrZz09

 

Contact
  • Monday, June 3
    • 1:00 PM → 3:00 PM
      Overviews and Updates
    • 3:00 PM → 3:30 PM
      Coffee Break 30m
    • 3:30 PM → 5:00 PM
      HPS Overview and Analysis updates
  • Tuesday, June 4
    • 8:30 AM → 10:00 AM
      Analysis Updates (cont.)
    • 10:00 AM → 10:30 AM
      Coffee Break 30m
    • 10:30 AM → 12:15 PM
      Analysis Updates (cont.)
      • 10:30 AM
        SVT hit killing and the 2016 tridents shapes/rates 40m
        Speaker: Mathew Graham (SLAC National Accelerator Laboratory)
      • 11:10 AM
        High pSum studies with hard z0 cut 25m
        Speaker: Tom Eichlersmith (University of Minnesota)
        HPS_2016_Re_Exclusion.pdf

        WARNING

        I did not sync with Alic before making these results so the plots labeled with "Alic" are behind and not representative of his current results as shown in his talk. I also refer to the vertical impact parameter y0 with its legacy name z0 which could easily lead to confusion.

        Momentum Smearing

        In my backup slides, I have some preliminary investigations into how this momentum smearing is implemented in hpstr. The long story short is that it appears to be algorithmically correct, but the smearing factors have not been tabulated in a long time. Perhaps the next step is to re-calculate these smearing factors in order to determine if they have shrunk compared to the prior estimate.

         

        Nprompt - is the number of dark brem produced within prompt readout acceptance.

        Mass Window - 2sigma on either side

        Maybe try using the z-cut from the original analysis in-place of z0

        Maybe need to re-tune the placement of the z0 cut?

      • 11:35 AM
        SIMPs analysis update 25m
        Speaker: Alic Spellman (UCSC)
        simp_2016_hps_collab_20240604.pdf
    • 1:30 PM → 3:00 PM
      Reconstruciton and data processing
    • 3:00 PM → 3:30 PM
      Coffee Break 30m
    • 3:30 PM → 5:30 PM
      MC Update
  • Wednesday, June 5
    • 8:30 AM → 10:00 AM
      HPS collaboration business
    • 10:00 AM → 10:30 AM
      Coffee Break 30m
    • 10:30 AM → 12:00 PM
      Future Plans
      • 10:30 AM
        X17 experiment in Hall B - A Direct Detection Search for Hidden Sector New Particles in the 3-60 MeV Mass Range 30m
        Speaker: Ashot Gasparian
        Gasparian_HPS_ColabMeeting_June_2024.pdf
      • 11:00 AM
        Generalizing the U(1) Current 30m
        Speaker: Cameron Bravo (SLAC)
        u1curr.pdf
    • 1:30 PM → 3:00 PM
      Discussions of the next run
    • 3:00 PM → 3:30 PM
      Coffee Break 30m
    • 3:30 PM → 5:00 PM
      Analisys mini-workshop
      Convener: Mathew Graham (SLAC National Accelerator Laboratory)
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