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@INPROCEEDINGS{VerdurasSchaeidt:631131,
      author       = {Verduras Schaeidt, Alain},
      title        = {{P}recision physics as a tool to investigate {BSM} {H}iggs
                      models: from colliders to {GW}},
      school       = {University of Hokkaido},
      reportid     = {PUBDB-2025-01922},
      year         = {2025},
      abstract     = {Understanding the shape of the Higgs potential and the
                      nature of electroweak symmetry breaking is a central goal of
                      particle physics. Extensions of the Standard Model (SM)
                      Higgs sector can lead to rich phenomenology, including
                      modified Higgs self-couplings, new scalar states, and strong
                      first-order phase transitions in the early
                      Universe—potentially sourcing a stochastic gravitational
                      wave background. Precision calculations, in particular loop
                      corrections to Higgs self-interactions, play a key role in
                      testing the viability of these BSM scenarios and connecting
                      collider observables with cosmological signals.In this talk
                      we will focus on two case studies: the real-singlet
                      extension of the SM without a $Z2\mathbb{Z}_2$ symmetry
                      (RxSM), and the Two-Higgs-Doublet Model (THDM). In the RxSM,
                      we identify regions compatible with a strong first-order
                      electroweak phase transition, compute the resulting
                      gravitational wave signal for LISA, and assess the impact of
                      one-loop corrections on di-Higgs production at the (HL-)LHC.
                      In parallel, we investigate the leading two-loop corrections
                      to trilinear Higgs couplings in the THDM and related models,
                      emphasizing their relevance for precision tests and
                      perturbative stability. Throughout, we highlight the
                      complementarity between collider and gravitational wave
                      signatures as tools to constrain BSM Higgs scenarios.},
      month         = {Jun},
      date          = {2025-06-20},
      organization  = {Seminar, Sapporo (Japan), 20 Jun 2025
                       - 20 Jun 2025},
      cin          = {T},
      cid          = {I:(DE-H253)T-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) / DFG
                      project G:(GEPRIS)520070247 - Untersuchungen von Neue Physik
                      mit generischen Präzisionsberechnungen (520070247)},
      pid          = {G:(DE-HGF)POF4-611 / G:(GEPRIS)520070247},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://bib-pubdb1.desy.de/record/631131},
}