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)
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...
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...
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...
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...
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...
