252 citations · 1.4k across the 26 of their papers we have counts for
30 papers
Baryon Asymmetry from Electroweak-Symmetric Domain Walls
Jacopo Azzola, Oleksii Matsedonskyi, Andreas Weiler
We investigate electroweak baryogenesis from domain walls with electroweak-symmetric cores moving through the electroweak-broken plasma. In the thick-wall regime, CP-violating semi…
Inverse Electroweak Baryogenesis
Jacopo Azzola, Oleksii Matsedonskyi, Andreas Weiler
We propose a mechanism for baryogenesis in which the baryon asymmetry is generated as an equilibrium response of weak sphalerons in a region where electroweak sphaleron transitions…
Minimal Electroweak Baryogenesis via Domain Walls
Jacopo Azzola, Oleksii Matsedonskyi, Andreas Weiler
The Standard Model extended by a real scalar singlet with an approximate symmetry offers a minimal framework for realizing electroweak baryogenesis (EWBG) during…
Hierarchies from Landscape Probability Gradients and Critical Boundaries
Oleksii Matsedonskyi
If the gradient of a probability distribution on a landscape of vacua aligns with the variation of some fundamental parameter, the parameter may be likely to take some non-generic…
High-Temperature Electroweak Baryogenesis with Composite Higgs
Benedict von Harling, Oleksii Matsedonskyi, Geraldine Servant
Electroweak Baryogenesis (EWBG) paired with the Composite Higgs (CH) scenario provides a well-motivated and testable framework for addressing the questions of the origin of the mat…
Status of Electroweak Baryogenesis in Minimal Composite Higgs
Sebastian Bruggisser, Benedict von Harling, Oleksii Matsedonskyi +1
We present an update on the status of electroweak baryogenesis in minimal composite Higgs models. The particularity of this framework is that the electroweak phase transition can p…
Dilaton at the LHC: Complementary Probe of Composite Higgs
Sebastian Bruggisser, Benedict von Harling, Oleksii Matsedonskyi +1
The dilaton is predicted in various extensions of the standard model containing sectors with an approximate spontaneously-broken conformal invariance. As a Goldstone boson of a spo…
Towards TeV-Scale Supersymmetric Electroweak Baryogenesis
Oleksii Matsedonskyi, James Unwin, Qingyun Wang
Electroweak baryogenesis (EWBG) offers a compelling narrative for the generation of the baryon asymmetry, however it cannot be realised in the Standard Model, and leads to severe e…
Electroweak Symmetry Non-Restoration from Dark Matter
Oleksii Matsedonskyi, James Unwin, Qingyun Wang
Restoration of the electroweak symmetry at temperatures around the Higgs mass is linked to tight phenomenological constraints on many baryogenesis scenarios. A potential remedy can…
Collider searches of scalar singlets across lifetimes
Elina Fuchs, Oleksii Matsedonskyi, Inbar Savoray +1
Spin-0 singlets arise in well-motivated extensions of the Standard Model. Their lifetime determines the best search strategies at hadron and lepton colliders. To cover a large rang…
High-Temperature Electroweak Symmetry Breaking by SM Twins
Oleksii Matsedonskyi
We analyse a possible adjustment of Twin Higgs models allowing to have broken electroweak (EW) symmetry at all temperatures below the sigma-model scale TeV. The modificatio…
Probing the relaxed relaxion and Higgs-portal with S1 & S2
Ranny Budnik, Hyungjin Kim, Oleksii Matsedonskyi +2
We study the recent \XeT excess in context of solar scalar, specifically in the framework of Higgs-portal and the relaxion model. We show that $m_ϕ= 1.9\,\keV$ and $g_{ϕe}=2.4\time…
Probing the Relaxed Relaxion at the Luminosity and Precision Frontiers
Abhishek Banerjee, Hyungjin Kim, Oleksii Matsedonskyi +2
Cosmological relaxation of the electroweak scale is an attractive scenario addressing the gauge hierarchy problem. Its main actor, the relaxion, is a light spin-zero field which dy…
High-Temperature Electroweak Symmetry Non-Restoration from New Fermions and Implications for Baryogenesis
Oleksii Matsedonskyi, Geraldine Servant
The strength of electroweak symmetry breaking may substantially differ in the early Universe compared to the present day value. In the Standard Model, the Higgs vacuum expectation…
Searching for Earth/Solar Axion Halos
Abhishek Banerjee, Dmitry Budker, Joshua Eby +4
We discuss the sensitivity of the present and near-future axion dark matter experiments to a halo of axions or axion-like particles gravitationally bound to the Earth or the Sun. T…
The CLIC Potential for New Physics
J. de Blas, R. Franceschini, F. Riva +100
The Compact Linear Collider (CLIC) is a mature option for the future of high energy physics. It combines the benefits of the clean environment of colliders with operation…
The top-quark window on compositeness at future lepton colliders
Gauthier Durieux, Oleksii Matsedonskyi
In composite Higgs (CH) models, large mixings between the top quark and the new strongly interacting sector are required to generate its sizeable Yukawa coupling. Precise measureme…
Top-Quark Physics at the CLIC Electron-Positron Linear Collider
H. Abramowicz, N. Alipour Tehrani, D. Arominski +114
The Compact Linear Collider (CLIC) is a proposed future high-luminosity linear electron-positron collider operating at three energy stages, with nominal centre-of-mass energies: 38…
Electroweak Phase Transition and Baryogenesis in Composite Higgs Models
Sebastian Bruggisser, Benedict von Harling, Oleksii Matsedonskyi +1
We present a comprehensive study of the electroweak phase transition in composite Higgs models, where the Higgs arises from a new, strongly-coupled sector which confines near the T…
The Baryon Asymmetry from a Composite Higgs
Sebastian Bruggisser, Benedict von Harling, Oleksii Matsedonskyi +1
We study the nature of the electroweak phase transition (EWPT) in models where the Higgs emerges as a pseudo-Nambu-Goldstone boson of an approximate global symmetry of a new strong…
Light Higgs Boson from a Pole Attractor
Oleksii Matsedonskyi, Marc Montull
We propose a new way of explaining the observed Higgs mass, within the cosmological relaxation framework. The key feature distinguishing it from other scanning scenarios is that th…
Minimally extended SILH
Mikael Chala, Gauthier Durieux, Christophe Grojean +2
Higgs boson compositeness is a phenomenologically viable scenario addressing the hierarchy problem. In minimal models, the Higgs boson is the only degree of freedom of the strong s…
Top Partners Searches and Composite Higgs Models
Oleksii Matsedonskyi, Giuliano Panico, Andrea Wulzer
Colored fermionic partners of the top quark are well-known signatures of the Composite Higgs scenario and for this reason they have been and will be subject of an intensive experim…
Mirror Cosmological Relaxation of the Electroweak Scale
Oleksii Matsedonskyi
The cosmological relaxation mechanism proposed in [1] allows for a dynamically generated large separation between the weak scale and a theory cutoff, using a sharp change of theory…