Future Collider Forum: 1st Workshop



Frank Simon (Max-Planck-Institute for Physics) , Georg Weiglein (T (Phenomenology)) , Karsten Koeneke (Uni Freiburg)

This is the first workshop of the German Future Collider Forum. Due to the circumstances, it is unfortunately online-only, held on three consecutive days in the mornings.

Connection is via Zoom:


Meeting ID: 659 2062 3195
Passcode: 348687


  • Ahmed Ali
  • Alan Price
  • alexej grudiev
  • Andreas Lehrach
  • Anke-Susanne Mueller
  • Arnulf Quadt
  • Birgit Stapf
  • Bluemlein Johannes
  • Bohdan Dudar
  • Carl Mikael Berggren
  • Christophe Grojean
  • Claude Vallee
  • Daniel Heuchel
  • Daniel Schulte
  • Dominik Duda
  • Elisabetta Gallo-Voss
  • Fabian Hummer
  • Fatih Yaman
  • Frank Gerigk
  • Frank Simon
  • Frank Zimmermann
  • Georg Weiglein
  • Gregor Herten
  • Gudrid Moortgat-Pick
  • Hubert Kroha
  • Ian Brock
  • Isabell-A. Melzer-Pellmann
  • Ivan Popov
  • jean-paul burnet
  • Johann Usovitsch
  • Juhi Dutta
  • Julie Torndal
  • Karl Jakobs
  • Karsten Koeneke
  • Katja Krueger
  • Klaus Moenig
  • Krisztian Peters
  • Leonhard Reichenbach
  • Lina Alasfar
  • Lorenz Emberger
  • Lorenz Gärtner
  • Luca Bottura
  • Lucia Masetti
  • Marc Wenskat
  • Maria Teresa Nunez Pardo De Vera
  • Markus Klute
  • Matthias Schröder
  • Matthias Steinhauser
  • Michael Moll
  • Norbert Meyners
  • olivier brunner
  • Patric Muggli
  • Peter McKeown
  • Peter Sievers
  • Ralph Assmann
  • Roger W
  • Ron Settles
  • sandra kortner
  • Sascha Mehlhase
  • Sergey Levonian
  • Stefan Richter
  • Sven Heinemeyer
  • Swathi Sasikumar
  • Tatiana Nechaeva
  • Thomas Kuhr
  • Thomas Madlener
  • Thomas Naumann
  • Thomas Schoerner-Sadenius
  • Tobias Hurth
  • Ulrich Einhaus
  • Ulrich Uwer
  • Vitalii Havrylenko
  • Yasser Radkhorrami
    • 09:00 10:50
      Machine Session: Future Accelerators
    • 10:50 11:05
      Coffee and tea break 15m
    • 11:05 12:50
      Machine Session: Future Accelerators
    • 09:00 11:00
      Detector Session
      • 09:00
        Detector concepts for Linear Colliders: Status and New Technologies 25m
        Speaker: Claude Vallee (CPPM/DESY)
      • 09:40
        Detector Development for Linear and Circular Colliders 25m
        Speaker: Dr Felix Sefkow (DESY)
      • 10:20
        Open Discussion 40m
    • 09:00 10:30
      Physics Session
    • 10:30 10:45
      Coffee and tea break 15m
    • 10:45 12:00
      Physics Session
      • 10:45
        Status of electroweak computations wrt numerical treatment of Feynman integrals 15m

        We are working on a computational set up to perform electroweak corrections at the three-loop level. The goal is to cover the computation of three-loop corrections contributing to the pseudo observables which are well defined at the Z-boson resonance.

        We would like to present the actual blueprint for the numerical evaluation of Feynman integrals and we are confident, that these ideas can be transferred to other projects dealing with radiative corrections.

        Speaker: Johann Usovitsch (CERN)
      • 11:10
        A Study of Top Anomalous Couplings at the FCC-ee 15m

        The FCC-ee as one of the proposed future $e^+e^-$ colliders offers indirect sensitivity to new physics at an unprecedented precision. The couplings of the top quark are of particular interest as it is the heaviest particle in the entire Standard Model suggesting it might couple more strongly to BSM fields. In this study, the expected sensitivity to top anomalous couplings at the FCC-ee is determined. The sensitivity is gauged in the semileptonic channel for top pair produced events in simulated datasets generated with FCCSW in the experimental environment of the IDEA detector at $\sqrt{s}$ = 365 GeV. Jet performance studies consider various jet definitions with work flowing back into FCCAnalyses to reevaluate jet tools in future works. Event reconstruction is performed, an event selection developed, and a kinematic fit is applied using a software package written in connection with the analysis. The 1sigma confidence intervals are determined for a minimal set of top anomalous couplings. The intervals are found from the observables of angular distributions and total cross sections for each coupling separately.

        Speaker: Julie Torndal (DESY / University of Copenhagen (NBI))
      • 11:35
        Di-Higgs with missing transverse momentum at FCC-hh 15m

        The determination of the Higgs self-coupling from di-Higgs events is one of the clearest benchmarks for the FCC-hh. Its potential has been well established already in several final states. In this talk studies into final states of the di-Higgs system which involve neutrinos are presented. The inclusion of additional final states will help to improve the precision of the self-coupling measurement even further, and specifically neutrino channels will help to shed light on an experimental aspect for the FCC-hh which has not been well investigated yet: a robust reconstruction of the missing transverse momentum (ETMiss) is crucial for such analyses. It is is clear that ETMiss reconstruction at the FCC-hh will be extremely challenging due to the high pile-up enviroment, with the average interactions per bunch crossing expected to be of the order of 1000. First investigations into possible final states, their event selections and potential are presented, which in future can then be used to derive benchmark scenarios for the ETMiss reconstruction performance.

        Speaker: Birgit Stapf (ATLAS (LHC Experiment ATLAS))