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Second ECFA Workshop on e+e- Higgs/EW/Top Factories, October 11-13, 2023, in Paestum (Salerno)

10–13 Oct 2023
Hotel Ariston, Paestum
Europe/Rome timezone

Session

Parallel - WG1-HTE+GLOB

12 Oct 2023, 14:00
Hotel Ariston, Paestum

Hotel Ariston, Paestum

Conveners

Parallel - WG1-HTE+GLOB

  • Jorge de Blas (University of Granada (Spain))
  • Sven Heinemeyer (IFCA (CSIC, Santander))
  • Marcel vos (IFIC - centro mixto U. Valencia/CSIC, Valencia, Spain)
  • Alexander Grohsjean (Deutsches Elektronen Synchrotron)
  • Karsten Köneke (Universität Freiburg)
  • Fabio Maltoni (Istituto Nazionale di Fisica Nucleare)
  • Chris Hays (Oxford University)

Presentation materials

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  1. 51. BSM Triple Higgs couplings at ILC/CLIC
    Sven Heinemeyer (IFCA (CSIC, Santander))
    12/10/2023, 14:00
    WG1-HTE - Physics Potential: Higgs, top, and electroweak
    ORAL

    Most analyses of triple Higgs couplings (THCs) focused on the SM-like coupling, $\lambda_{hhh}$, assuming the SM value, $\kappa_\lambda := \lambda_{hhh}/\lambda_{hhh}^{\rm SM} = 1$.
    We will discuss two BSM physics cases:
    1) $\kappa_\lambda \neq 1$, which is suggested by the requirements for baryogenesis (to explain the the matter-antimatter asymmetry of the universe.
    2) BSM THCs, such as...

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  2. 56. Optimizing the Higgs self-coupling measurement at ILC and C^3
    Bryan Bliewert (DESY - FTX), Dimitris Ntounis (Stanford University & SLAC National Accelerator Laboratory)
    12/10/2023, 14:20
    WG1-HTE - Physics Potential: Higgs, top, and electroweak
    ORAL

    Measuring the Higgs self-coupling is a key target for future $e^{+}e^{-}$ colliders and can be accessed through double Higgs production. An important question is how the precision of this measurement improves with higher center-of-mass collision energy. In this work, we study the ZHH process at center-of-mass energies of 500, 550, and 600 GeV, simulated with the ILD detector concept from the...

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  3. 35. Precise predictions for the trilinear Higgs coupling in arbitrary models
    Johannes Braathen (DESY)
    12/10/2023, 14:40
    WG1-HTE - Physics Potential: Higgs, top, and electroweak
    ORAL

    The trilinear Higgs coupling provides a unique opportunity to probe the structure of the Higgs sector, study the nature of the electroweak phase transition, and search for indirect signs of Beyond-the-Standard Model (BSM) Physics. Recently, it was also shown that confronting the prediction for the trilinear Higgs coupling with the latest experimental bounds opens a powerful new way to probe...

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  4. 53. $(g-2)_\mu$ and SUSY Dark Matter at ILC/CLIC
    Sven Heinemeyer (IFCA (CSIC, Santander))
    12/10/2023, 15:00
    WG1-GLOB - Physics Potential: Global interpretations
    ORAL

    We analyze the electroweak (EW) sector of the MSSM in view of the experimental results for the anomalous magnetic moment of the muon, $(g-2)_\mu$, the Dark Matter (DM) relic density, the DM direct detection (DD) bounds and in particular the LHC searches for such EW particles. We demonstrate the complementarity of future DD experiments and future high-energy $e^+e^-$ colliders. We show that...

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  5. 22. EFT analysis of Higgs naturalness & search strategies at a future electron-positron collider (canceled)
    Shaouly Bar-Shalom (Technion, Israel)
    12/10/2023, 15:20
    WG1-HTE - Physics Potential: Higgs, top, and electroweak
    ORAL

    An effective field theory (EFT) approach is used to investigate naturalness of the Higgs sector at scales below $M \sim {\cal O}(10)$ TeV. In particular, we obtain the leading 1-loop EFT contributions to the Higgs mass with a Wilsonian-like hard cutoff $\Lambda$ (i.e., $\Lambda < M$), and determine the constraints on the corresponding operator coefficients for these effects to alleviate...

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