S. Heinemeyer
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View article: Impact of one-loop corrections to trilinear scalar couplings on di-Higgs production in the RxSM
Impact of one-loop corrections to trilinear scalar couplings on di-Higgs production in the RxSM Open
We investigate di-Higgs production at the (HL-)LHC and possible high-energy future $$e^+e^-$$ colliders within the real Higgs singlet extension of the Standard Model (SM), the RxSM. This model has two CP-even Higgs bosons, h and H …
View article: Complementarity of gravitational wave analyses and di-Higgs production in the exploration of the Electroweak Phase Transition dynamics in the RxSM
Complementarity of gravitational wave analyses and di-Higgs production in the exploration of the Electroweak Phase Transition dynamics in the RxSM Open
The real singlet extension of the Standard Model (SM), RxSM, is one of the simplest Beyond-the-Standard Model (BSM) theories that can accommodate a strong first-order electroweak phase transition (SFOEWPT). We survey the possible thermal h…
View article: Experimental Determination of BSM Triple Higgs Couplings at the HL-LHC with Neural Networks
Experimental Determination of BSM Triple Higgs Couplings at the HL-LHC with Neural Networks Open
The shape of the Higgs potential is modified by the presence of additional scalar fields, as predicted in many Beyond-Standard-Model (BSM) scenarios. In such cases, deviations in the Higgs self-interactions, in particular the trilinear Hig…
View article: Sensitivity to triple Higgs couplings via di-Higgs production in the RxSM at the (HL-)LHC and future e+e− colliders
Sensitivity to triple Higgs couplings via di-Higgs production in the RxSM at the (HL-)LHC and future e+e− colliders Open
A bstract The real Higgs singlet extension of the Standard Model (SM) without Z 2 symmetry, the RxSM, is the simplest extension of the SM that features a First Order Electroweak Phase Transition (FOEWPT) in the early universe. The FOEWPT i…
View article: Lepton flavor violation in nonholomorphic soft SUSY-breaking scenarios: experimental limits and excesses
Lepton flavor violation in nonholomorphic soft SUSY-breaking scenarios: experimental limits and excesses Open
We investigate the prospects for the observation of lepton flavor violation (LFV) within the nonholomorphic supersymmetric standard model (NHSSM). We examine charged lepton flavor-violating (cLFV) decays such as such $$\mu \rightarrow e \g…
View article: Toward a refined understanding of nonholomorphic soft SUSY-breaking effects on the Higgs boson mass spectra
Toward a refined understanding of nonholomorphic soft SUSY-breaking effects on the Higgs boson mass spectra Open
We study the impact of the non-holomorphic (NH) soft supersymmetry-breaking terms T33′D and μ′, which introduce additional supersymmetry-breaking effects beyond the holomorphic structure of the superpotential, on the Higgs boson mass spect…
View article: New Physics Search at the CEPC: a General Perspective
New Physics Search at the CEPC: a General Perspective Open
The Circular Electron-Positron Collider (CEPC), a proposed next-generation Higgs factory, provides new opportunities to explore physics beyond the Standard Model (SM). With its clean electron-positron collision environment and the ability …
View article: Large One-Loop Effects of BSM Triple Higgs Couplings on Double Higgs Production at $e^+e^-$ Colliders
Large One-Loop Effects of BSM Triple Higgs Couplings on Double Higgs Production at $e^+e^-$ Colliders Open
The measurement of the Higgs boson self-coupling is crucial for our understanding of the nature of electroweak symmetry breaking and potential physics beyond the Standard Model (BSM). In this work, we study in the framework of the 2-Higgs-…
View article: Higgs pair production in the 2HDM: impact of loop corrections to the trilinear Higgs couplings and interference effects on experimental limits
Higgs pair production in the 2HDM: impact of loop corrections to the trilinear Higgs couplings and interference effects on experimental limits Open
The results obtained at the LHC for constraining the trilinear Higgs self-coupling of the detected Higgs boson at about 125 GeV, $$\lambda _{hhh}$$ , via the Higgs pair production process have significantly improved during the last ye…
View article: Reinterpretation and preservation of data and analyses in HEP
Reinterpretation and preservation of data and analyses in HEP Open
Data from particle physics experiments are unique and are often the result of a very large investment of resources. Given the potential scientific impact of these data, which goes far beyond the immediate priorities of the experimental col…
View article: Sensitivity to Triple Higgs Couplings via Di-Higgs Production in the RxSM at the (HL-)LHC and future $e^+e^-$ Colliders
Sensitivity to Triple Higgs Couplings via Di-Higgs Production in the RxSM at the (HL-)LHC and future $e^+e^-$ Colliders Open
The real Higgs singlet extension of the Standard Model (SM) without $Z_2$ symmetry, the RxSM, is the simplest extension of the SM that features a First Order Electroweak Phase Transition (FOEWPT) in the early universe. The FOEWPT is one of…
View article: ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in $$ t\overline{t} $$ production
ALP-ine quests at the LHC: hunting axion-like particles via peaks and dips in $$ t\overline{t} $$ production Open
A bstract We present an analysis of the sensitivity of current and future LHC searches for new spin-0 particles in top–anti-top-quark $$ \left(t\overline{t}\right) $$ final states, focusing on generic axion-like particles (ALPs) tha…
View article: Trilinear Higgs Couplings in N2HDM and 2HDMS Type II at 𝒆 + 𝒆 − Colliders
Trilinear Higgs Couplings in N2HDM and 2HDMS Type II at 𝒆 + 𝒆 − Colliders Open
View article: Lepton Flavor Violation in Nonholomorphic Soft SUSY-Breaking Scenarios: Experimental Limits and Excesses
Lepton Flavor Violation in Nonholomorphic Soft SUSY-Breaking Scenarios: Experimental Limits and Excesses Open
We investigate the prospects for the observation of lepton flavor violation (LFV) within the nonholomorphic supersymmetric standard model (NHSSM). We examine charged lepton flavor-violating (cLFV) decays such as such $μ\rightarrow e γ$, $τ…
View article: Review of Particle Physics
Review of Particle Physics Open
The summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,717 new measurements from 869 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs bos…
View article: 95 GeV Higgs boson in the Georgi-Machacek model
95 GeV Higgs boson in the Georgi-Machacek model Open
CMS and ATLAS have reported small excesses in the search for low-mass Higgs bosons in the diphoton decay channel at exactly the same mass, 95.4 GeV. These searches rely on improved analysis techniques, enhancing in particular the discrimin…
View article: Consistent Excesses in the Search for $\tilde χ_2^{\rm 0} \tilde χ_1^{\rm \pm}$ : Wino/bino vs. Higgsino Dark Matter
Consistent Excesses in the Search for $\tilde χ_2^{\rm 0} \tilde χ_1^{\rm \pm}$ : Wino/bino vs. Higgsino Dark Matter Open
The quest for supersymmetric (SUSY) particles is among the main search channels currently pursued at the LHC. Particularly, electroweak (EW) particles with masses as low as a few hundred GeV are still viable. Recent searches for the ``gold…
View article: Higgs Pair Production in the 2HDM: Impact of Loop Corrections to the Trilinear Higgs Couplings and Interference Effects on Experimental Limits
Higgs Pair Production in the 2HDM: Impact of Loop Corrections to the Trilinear Higgs Couplings and Interference Effects on Experimental Limits Open
The results obtained at the LHC for constraining the trilinear Higgs self-coupling of the detected Higgs boson at about 125 GeV, $λ_{hhh}$, via the Higgs pair production process have significantly improved during the last years. We investi…
View article: $$(g-2)_\mu $$ and stau coannihilation: dark matter and collider analysis
$$(g-2)_\mu $$ and stau coannihilation: dark matter and collider analysis Open
Slepton coannihilation is one of the most promising scenarios that can bring the predicted Dark Matter (DM) abundance in the the Minimal Supersymmetric Standard Model (MSSM) into agreement with the experimental observation. In this scenari…
View article: Higgs Pair Production and Triple Higgs Couplings at the LHC in the 2HDM framework
Higgs Pair Production and Triple Higgs Couplings at the LHC in the 2HDM framework Open
Gaining information about the shape of the Higgs potential is one of the main goals of particle physics for the coming years. The trilinear Higgs self-interactions can directly be probed via Higgs pair production, which at the LHC happens …
View article: 95.4 GeV diphoton excess at ATLAS and CMS
95.4 GeV diphoton excess at ATLAS and CMS Open
The ATLAS Collaboration has recently reported the results of a low-mass Higgs-boson search in the diphoton final state based on the full Run 2 dataset. The results are based on an improved analysis with respect to the previous analysis, wh…
View article: First shot of the smoking gun: probing the electroweak phase transition in the 2HDM with novel searches for A → ZH in $$ {\ell}^{+}{\ell}^{-}t\overline{t} $$ and $$ \nu \nu b\overline{b} $$ final states
First shot of the smoking gun: probing the electroweak phase transition in the 2HDM with novel searches for A → ZH in $$ {\ell}^{+}{\ell}^{-}t\overline{t} $$ and $$ \nu \nu b\overline{b} $$ final states Open
A bstract Recently the ATLAS collaboration has reported the first results of searches for heavy scalar resonances decaying into a Z boson and a lighter new scalar resonance, where the Z boson decays leptonically and the lighter scalar deca…
View article: Focus topics for the ECFA study on Higgs / Top / EW factories
Focus topics for the ECFA study on Higgs / Top / EW factories Open
In order to stimulate new engagement and trigger some concrete studies in areas where further work would be beneficial towards fully understanding the physics potential of an $e^+e^-$ Higgs / Top / Electroweak factory, we propose to define…
View article: Probes of CP-violating Higgs couplings and their impact on baryogenesis
Probes of CP-violating Higgs couplings and their impact on baryogenesis Open
We investigate the CP structure of the Higgs couplings to fermions and gluons by using constraints from LHC measurements and the electric dipole moment of the electron. We further use these constraints to assess how much of the observed ba…
View article: Distinguishing Axion-Like Particles and 2HDM Higgs bosons in $t \bar{t}$ production at the LHC
Distinguishing Axion-Like Particles and 2HDM Higgs bosons in $t \bar{t}$ production at the LHC Open
We present an analysis of the sensitivity of LHC searches for new spin-0 particles produced via gluon-fusion and decaying into top-antitop-quark ($t\bar{t}$) final states to generic axion-like particles (ALPs) coupled to top-quarks and glu…
View article: Physics case for an <i>e</i><sup>+</sup><i>e</i><sup>−</sup> collider at 500 GeV and above
Physics case for an <i>e</i><sup>+</sup><i>e</i><sup>−</sup> collider at 500 GeV and above Open
Some highlights of the physics case for running an e + e − collider at 500 GeV and above are discussed with a particular emphasis on the experimental access to the Higgs potential via di-Higgs and (at sufficiently high energy) triple Higgs…
View article: Physics case for an $e^+e^-$ collider at 500 GeV and above
Physics case for an $e^+e^-$ collider at 500 GeV and above Open
Some highlights of the physics case for running an $e^+e^-$ collider at 500 GeV and above are discussed with a particular emphasis on the experimental access to the Higgs potential via di-Higgs and (at sufficiently high energy) triple Higg…
View article: Role of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>λ</mml:mi></mml:mrow><mml:mrow><mml:mi>h</mml:mi><mml:msup><mml:mrow><mml:mi>H</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>H</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:msub></mml:mrow></mml:math> in Higgs boson decays <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>h</mml:mi></mml:math> to <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>b</mml:mi><mml:mi>s</mml:mi></mml:math> in the 2HDM
Role of in Higgs boson decays to in the 2HDM Open
Within the two Higgs doublet model (2HDM) with CP conservation and a softly broken Z2 symmetry, we analyze the flavor changing Higgs decays h→bs (bs refers jointly to the two decay channels bs¯ and b¯s), where h is identified with the SM-l…
View article: Sensitivity to triple Higgs couplings via di-Higgs production in the 2HDM at the (HL-)LHC
Sensitivity to triple Higgs couplings via di-Higgs production in the 2HDM at the (HL-)LHC Open
An important task of the LHC is the investigation of the Higgs-boson sector. Of particular interest is the reconstruction of the Higgs potential, i.e. the measurement of the Higgs self-couplings. Based on previous analyses, within the 2-Hi…
View article: Reduction of couplings and Finite unified theories
Reduction of couplings and Finite unified theories Open
We review the basic idea of the reduction of couplings method, both in the dimensionless and dimension 1 and 2 sectors. Then, we show the application of the method to $N=1$ supersymmetric GUTs, and in particular to the construction of fini…