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    ILD Detector Optimisation Meeting (former software/analysis meeting)

    → Europe/Zurich
    Description

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    11 participants

    Vincent Boudry (VBY), Adrian Irles Quiles (AIS), Graham Wilson (GWS), Teresa Núñez (TNZ), Filip Żarnecki (FZI), Bartłomiej Brudnowski (BBI)
    Jesús Marquez (JMZ), Lea Kuttler (LKR), Melissa Almanza Soto (MAA), Thomas Madlener (TMR), Yan Benhammou (YBU)

    News from coordinators

    Physics Coordinators.

    • See minutes for dates
    • Reheashal for LCWS2026: for next week: November 4th or 5th ?
      • AIS: 15 presentations

    Software Coord. (Thomas)

    • track rec. is continuing to evolve: to be presented soon
    • tentative list of tasks ➞ volunteers
    • recent work : please contact me... 

    Technical coord (Vincent)

    • update on contact people for systems
      • mailing list being updated (with some glitches)

    Presentation from Filip: scalar s➞ττ @250 and 550 GeV at ILC

    • update of previous work.
      • standard ILC250 and ILC550 background
      • fast simulation (SVG), new MC samples
    • Event reconstruction (PandoraPFO objects)
      • qq or 2ℓ ; tight selection for scalar decays (2τ)
    • Long standing problem: limits ~ ms = 125 GeV
      • coupling to Z + same mass ⇒ σs + σH =σSM 
    • Limits and systematics presented

    Q?

    by GWS: why 10% ?
    FZI: Arbitrary choice without specific model. Have to make one if keep model independent ... ➞ write on slides
    Higgs workshop: subject not addressed

    Complement information by Teresa Núñez.: limits at 550 GeV

     

     

     

     

     

     

     

     

    There are minutes attached to this event. Show them.
      • 14:00 → 14:05
        Physics coordinator report 5m
        Speakers: Taikan Suehara (ICEPP, The University of Tokyo), Graham Wilson

        LCWS2026: 9-13 November at KEK (+online)

        https://agenda.linearcollider.org/event/11000/

        • New results should be presented at this ILD opt meeting
          • Will have special one next week, 4th Nov. 2pm CET- (to be announced)
        • ILD work should be uploaded to indico 2 working days prior
          • Indico being prepared

         

        Next ILD opt meetings

        • 4th Nov. 2pm CET- (Chair: Graham) preparation for LCWS2026
        • No meeting on 11th Nov. (and 18th)
        • 25th Nov. 2pm CET - (Chair: Leonhard) normal meeting

         

        FCC workshops (as far as I know)

         

        LCVIsion workshop: 15-17 March at DESY: details to be announced

         

        Modification notes: (Dates fixed to Nov 4th not Nov 5th)

         

      • 14:05 → 14:10
        Software coordinator report 5m
        Speakers: Thomas Madlener (Deutsches Elektronen-Synchrotron (DE)), Leonhard Reichenbach (CERN / University of Bonn (DE))
      • 14:10 → 14:15
        Technical coordinator report 5m
        Speakers: Vincent Boudry (Laboratoire Leprince-Ringuet, CNRS/IN2P3, École polytechnique), Karsten Buesser (DESY)
      • 14:15 → 14:35
        Update on Exotic scalar searches in s ➞ ττ decay channel 20m
        Speaker: Aleksander Filip Zarnecki (University of Warsaw)
        exscalar_ild_20261028.pdf
      • 14:35 → 14:40
        Update Plot 5m
        Speaker: Maria Teresa Nunez Pardo De Vera
        ExoticScalars_LCWS2026_draft_update550fullsamples.pdf
      • 14:40 → 15:00
        discussion time 20m