A3a: Extended Higgs sectors at the LHC

Principal investigators
Prof. Margarete Muehlleitner Karlsruhe Institute of Technology
Prof. Tilman Plehn Heidelberg University

Subject

Project A3a targets specifically electroweak baryogenesis for the generation of the baryon-antibaryon asymmetry of the Universe by making a link between Higgs physics, cosmology and collider physics. In a global fit the still allowed amount of CP violation, which is necessary for baryogenesis, is determined; optimal observables for the measurement of CP violation at the LHC are derived. By taking into account all relevant experimental and theoretical constraints at highest possible precision we derive the implications of a strong first order phase transition for the LHC phenomenology of extended Higgs sectors. Furthermore, the spectrum of gravitational waves generated in the phase transition is investigated.

Research Topics

  1. Precision studies of the electroweak vacuum: vacuum stability of the 2HDM and the NMSSM at next-to-leading order; symmetry structure of extended Higgs sectors with dark matter candidates; non-perturbative evolution of the Higgs potential ; machine learning methods in the numerical evolution.
  2. Precision predictions for LHC phenomenology: corrections to Higgs decays, e.g. electroweak corrections in the CP-violating 2HDM, SUSY-NLO corrections for charged Higgs in the CP-violating NMSSM, NLO SUSY-QCD corrections to gluon fusion into the MSSM pseudoscalar; impact of higher-order corrections on model parameters.
  3. Phenomenology and analysis: information geometry of new light scalar, matrix element method for complex phase space configurations, generative adversarial networks for phase space mapping, impact of precision predictions on global analysis.
P3H-25-002
Title: Triple Higgs Boson Production with Two Heavy Scalars at the LHC via a Simplified Approach
Type: Paper
Authors: Andreas Papaefstathiou, Gilberto Tetlalmatzi-Xolocotzi
arXiv:2501.14866
Info:
P3H-24-114
Title: Advancing Tools for Simulation-Based Inference
Type: Paper
Authors: H. Bahl, V. Bresò, G. De Crescenzo and T. Plehn
2410.07315
Info:
P3H-24-113
Title: Double and triple Higgs boson production to probe the electroweak phase transition
Type: Paper
Authors: L. Biermann, Ch. Borschensky, Ch. Englert, M. Mühlleitner, W. Naskar
https://arxiv.org/pdf/2408.08043
Info: Published in Phys. Rev. D 110 (2024) 9, 095012
P3H-24-112
Title: Freeze-in as a complementary process to freeze-out
Type: Paper
Authors: R. Capucha, K. Elyaouti, M. Mühlleitner, J. Plotnikov, R. Santos
https://arxiv.org/pdf/2407.04809
Info: Published in JHEP 09 (2024) 113
P3H-24-110
Title: BSMPT v3 A Tool for Phase Transitions and Primordial Gravitational Waves in Extended Higgs Sectors
Type: Paper
Authors: Ph. Basler, L. Biermann, M. Mühlleitner, J. Müller, R. Santos, J. Viana
https://arxiv.org/pdf/2404.19037
Info:
P3H-24-109
Title: A Global View of the EDM Landscape
Type: Paper
Authors: S. Degenkolb, N. Elmer, T. Modak, M. Mühlleitner, T. Plehn
https://arxiv.org/pdf/2403.02052
Info:
P3H-24-108
Title: Impact of new experimental data on the C2HDM: the strong interdependence between LHC Higgs data and the electron EDM
Type: Paper
Authors: Th. Biekötter, D. Fontes, M. Mühlleitner, J.C. Romao, R. Santos, J.P. Silva
https://arxiv.org/pdf/2403.02425
Info: Published in JHEP 05 (2024) 127
P3H-24-107
Title: Dark Colored Scalars Impact on Single and Di-Higgs Production at the LHC
Type: Paper
Authors: P. Gabriel, M. Mühlleitner, D. Neacsu, R. Santos
https://arxiv.org/pdf/2308.07023
Info:
P3H-24-105
Title: The O((alpha_t+alpha_lambda+alpha_kappa) correction to the rho parameter and its effect on the W boson mass calculation in the complex NMSSM
Type: Paper
Authors: T.N. Dao, M. Gabelmann, M. Mühlleitner
https://arxiv.org/pdf/2308.04059
Info: Published in Eur. Phys. J. C83 (2023) 11, 1079
P3H-24-083
Title: NNLL-fast 2.0: Coloured Sparticle Production at the LHC Run 3 with S‾√ = 13.6 TeV
Type: Paper
Authors: Wim Beenakker, Christoph Borschensky, Michael Krämer, Anna Kulesza, Eric Laenen, Judita Mamužić, Laura Moreno Valero
arXiv:2404.18837
Info:
P3H-24-071
Title: $ \mathcal{CP} $-sensitive simplified template cross-sections for $ t\overline{t}H $
Type: Paper
Authors: H. Bahl, A. Carnelli, F. Dèliot, E. Fuchs, A. Kotsokechagia, T. L. Marsault, M. Menen, L. Schoeffel and M. Saimpert
2406.03950
Info: Published in JHEP 10 (2024), 214
P3H-24-070
Title: A Global View of the EDM Landscape
Type: Paper
Authors: S. Degenkolb, N. Elmer, T. Modak, M. M\“uhlleitner and T. Plehn
2403.02052
Info:
P3H-24-019
Title: Constraining the Higgs potential with neural simulation-based inference for di-Higgs production
Type: Paper
Authors: R. Mastandrea, B. Nachman and T. Plehn
2405.15847
Info: Published in Phys. Rev. D 110, no.5, 056004 (2024)
P3H-24-007
Title: Di-Higgs production via axion-like particles
Type: Paper
Authors: F. Esser, M. Madigan, A. Salas-Bernardez, V. Sanz and M. Ubiali
2404.08062
Info: Published in JHEP 10 (2024), 164
P3H-23-111
Title: New Theory Paradigms at the LHC
Type: Paper
Authors: M. Mühlleitner and T. Plehn
arXiv: N/A
Info:
P3H-23-107
Title: Returning CP-observables to the frames they belong
Type: Paper
Authors:J. Ackerschott, R. K. Barman, D. Gonçalves, T. Heimel and T. Plehn
arXiv: 2308.00027
Info: SciPost Phys. 17, no.1, 001 (2024)
P3H-23-069
Title: Ultraviolet sensitivity in Higgs-Starobinsky inflation
Type: Paper
Authors: S. M. Lee, T. Modak, K. y. Oda and T. Takahashi
arXiv: 2303.09866
Info: JCAP 08 (2023), 045
P3H-23-068
Title: Probing baryogenesis with radiative beauty decay and electron electric dipole moment
Type: Paper
Authors: W. S. Hou, G. Kumar and T. Modak
arXiv: 2302.08847
Info: Phys. Rev. D 109 (2024) no.1, L011701
P3H-21-110
Title: Back to the formula - LHC edition
Type: Paper
Authors: A. Butter, T. Plehn, N. Soybelman and J. Brehmer
arXiv:2109.10414
Info: Published in SciPost Phys. 16, no.1, 037 (2024)