A5090408249- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Computational Physics and Python Applications
- High-Energy Particle Collisions Research
- Relativity and Gravitational Theory
- Particle Detector Development and Performance
- Noncommutative and Quantum Gravity Theories
- Astrophysics and Cosmic Phenomena
- Theoretical and Computational Physics
- Advanced Thermodynamics and Statistical Mechanics
- Earth Systems and Cosmic Evolution
- Scientific Research and Discoveries
- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Solar and Space Plasma Dynamics
- Complex Systems and Time Series Analysis
- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Gamma-ray bursts and supernovae
- Nuclear Physics and Applications
- Discourse Analysis and Cultural Communication
École Polytechnique Fédérale de Lausanne
2016-2025
European Organization for Nuclear Research
1992-2014
Technical University of Darmstadt
2011
École Polytechnique
2010
Brera Astronomical Observatory
2007
University of Lausanne
1999-2005
Imperial College London
1999
Institute for Nuclear Research
1985-1998
Helsinki Institute of Physics
1996
University of Helsinki
1996
We argue that the Higgs boson of Standard Model can lead to inflation and produce cosmological perturbations in accordance with observations. An essential requirement is non-minimal coupling scalar field gravity; no new particle besides already present electroweak theory required.
We investigate an extension of the Minimal Standard Model by right-handed neutrinos (the $ν$MSM) to incorporate neutrino masses consistent with oscillation experiments. Within this theory, only candidates for dark matter particles are sterile a few keV. Requiring that these explain entirely (warm) matter, we find their number is at least three. show that, in minimal choice three neutrinos, mass lightest active smaller than ${\cal O}(10^{-5})$ eV, which excludes degenerate spectra and fixes...
We provide nonperturbative evidence for the fact that there is no hot first or second order electroweak phase transition at large Higgs masses, ${m}_{H}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}95$, 120, and 180 GeV. This means line of transitions separating symmetric broken phases small ${m}_{H}$ has an end point ${m}_{H,c}$. In minimal standard theory $70<{m}_{H,c}<95\mathrm{GeV}$ most likely ${m}_{H,c}\ensuremath{\approx}80\mathrm{GeV}$. If weakly coupled boson found to be...
We present a comprehensive overview of an extension the Standard Model that contains three right-handed (sterile) neutrinos with masses below electroweak scale [the Neutrino Minimal Model, (nuMSM)]. consider history Universe from inflationary era through today and demonstrate most observed phenomena beyond can be explained within framework this model. review mechanism baryon asymmetry in nuMSM discuss dark matter candidate warm or cold satisfies all existing constraints. From viewpoint...
We review recent progress in the study of anomalous baryon number non-conservation at high temperatures and energy collisions. Recent results on temperature phase transitions are described, applications to electroweak baryogenesis considered. The current status problem instanton-like processes energies is outlined. This paper written occasion Sakharov's 75th anniversary will appear memorial volume Uspekhi (Usp. Fiz. Nauk, 166, No 5, May 1996).
This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (Search Hidden Particles) experiment is intended to hunt in largely unexplored domain of very weakly interacting particles with masses below Fermi scale, inaccessible LHC experiments, and study tau neutrino physics. same proton beam setup can be used later look decays tau-leptons lepton flavour number non-conservation, $\tau\to 3\mu$ search weakly-interacting sub-GeV dark matter candidates. We discuss...
We review recent progress in the study of anomalous baryon number non-conservation at high temperatures and energy collisions.Recent results on temperature phase transitions are described, applications to electroweak baryogenesis considered.The current status problem instanton-like processes energies is outlined.This paper written occasion
In the standard model there are charges with Abelian anomaly only (e.g., right-handed electron number) which effectively conserved in early Universe until some time shortly before electroweak scale. A state at finite chemical potential of such a charge, possibly arising due to asymmetries produced grand unified theory scale, is unstable generation hypercharge magnetic field. Quite large fields ( $\ensuremath{\sim}{10}^{22}$ G $T\ensuremath{\sim}100$ GeV typical inhomogeneity scale...
We review observational evidence for a matter–antimatter asymmetry in the early universe, which leads to remnant matter density we observe today. also discuss bounds on presence of antimatter present-day including possibility large lepton cosmic neutrino background. briefly theoretical framework within baryogenesis, dynamical generation asymmetry, can occur. As an example, testable minimal particle physics model that simultaneously explains baryon oscillations and dark matter.
We analyse the process of reheating Universe in electroweak theory where Higgs field plays a role inflaton. estimate maximal temperature and fix initial conditions for radiation-dominated phase expansion framework Standard Model (SM) nuMSM -- minimal extension SM by three right-handed singlet fermions. show that inflationary epoch is followed matter dominated stage related to oscillations. investigate energy transfer from Higgs-inflaton particles radiation starts at T_r~(3-15)*10^{13} GeV,...
There are indications that gravity is asymptotically safe. The Standard Model (SM) plus could be valid up to arbitrarily high energies. Supposing this indeed the case and assuming there no intermediate energy scales between Fermi Planck we address question of whether mass Higgs boson $m_H$ can predicted. For a positive induced anomalous dimension $A_\lambda>0$ running quartic scalar self interaction $\lambda$ at beyond determined by fixed point zero. This results in $m_H=m_{\rm min}=126$...