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Mikhail Chapochnikov

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Publications associées (139)

Standard Model Higgs boson mass from inflation

Mikhail Chapochnikov, Amaury Magnin

We analyse one-loop radiative corrections to the inflationary potential in the theory, where inflation is driven by the Standard Model Higgs field. We show that inflation is possible provided the Higgs mass mH lies in the interval mmin < mH < mmax, where m ...

2009

The role of sterile neutrinos in cosmology and astrophysics

Mikhail Chapochnikov, Alexey Boyarsky, Oleg Ruchayskiy

We present a comprehensive overview of an extension of the Standard Model that contains three right-handed (sterile) neutrinos with masses below the electroweak scale [the Neutrino Minimal Standard Model (vMSM)]. We consider the history of the Universe fro ...

Annual Reviews2009

Quantum scale invariance, cosmological constant and hierarchy problem

Mikhail Chapochnikov, Daniel Zenhäusern

We construct a class of theories which are scale-invariant on quantum level in all orders of perturbation theory. In a subclass of these models scale invariance is spontaneously broken, leading to the existence of a massless dilaton. The applications of th ...

2009

On initial conditions for the Hot Big Bang

Mikhail Chapochnikov

We analyse the process of reheating the Universe in the electroweak theory where the Higgs field plays a role of the inflaton. We estimate the maximal temperature of the Universe and fix the initial conditions for radiation-dominated phase of the Universe ...

2009

The Standard Model Higgs boson as the inflaton

Mikhail Chapochnikov

We argue that the Higgs boson of the Standard Model can lead to inflation and produce cosmological perturbations in accordance with observations. An essential requirement is the non-minimal coupling of the Higgs scalar field to gravity; no new particle bes ...

2008

Kaon physics within nuMSM

Mikhail Chapochnikov

2008

Sterile neutrino dark matter as a consequence of nuMSM-induced lepton asymmetry

Mikhail Chapochnikov

It has been pointed out by one of the authors (Shaposhnikov 2008Preprint0804.4542) that in the νMSM (Standard Model extended with three right-handed neutrinos with masses smaller than the electroweak scale), there is a corner in the parameter space where C ...

2008

The nuMSM, leptonic asymmetries, and properties of singlet fermions

Mikhail Chapochnikov

We study in detail the mechanism of baryon and lepton asymmetry generation in the framework of the νMSM (an extension of the Standard Model by three singlet fermions with masses smaller than the electroweak scale). We elucidate the issue of CP-violation in ...

2008

Sterile neutrinos in cosmology and how to find them in the lab

Mikhail Chapochnikov

2008

Lightest sterile neutrino abundance within the nuMSM

Mikhail Chapochnikov

2007

A possible symmetry of the nuMSM

Mikhail Chapochnikov

To explain the dark matter and the baryon asymmetry of the Universe, the parameters of the ν MSM (an extension of the Minimal Standard Model by three singlet neutrinos with masses smaller than the electroweak scale) must be fine-tuned: one of the masses sh ...

2007

How to find neutral leptons of the nuMSM?

Mikhail Chapochnikov

An extension of the Standard Model by three singlet fermions with masses smaller than the electroweak scale allows to explain simultaneously neutrino oscillations, dark matter and baryon asymmetry of the Universe. We discuss the properties of neutral lepto ...

2007

Searching for dark matter sterile neutrino in laboratory

Mikhail Chapochnikov

If the dark matter of the Universe is made of sterile neutrinos with mass in the keV region, it can be searched for with the help of x-ray satellites. We discuss the prospects of laboratory experiments that can be competitive and complementary to space mis ...

American Physical Society2007

Chiral Asymmetry from a 5D Higgs Mechanism

Mikhail Chapochnikov

An intriguing feature of the Standard Model is that the representations of the unbroken gauge symmetries are vector-like whereas those of the spontaneously broken gauge symmetries are chiral. Here we provide a toy model which shows that a natural explanati ...

Springer Nature2007

Anomalous Abelian solitons

Mikhail Chapochnikov, Matthias Schmid

The chiral Abelian Higgs model contains an interesting class of solitons found by Rubakov and Tavkhelidze. These objects carry non-zero fermion number NF (or Chern-Simons number NCS, what is the same because of the chiral anomaly) and are stable for suffic ...

2007

The nuMSM, inflation, and dark matter

Mikhail Chapochnikov, Igor Tkachev

We show how to enlarge the νMSM (the minimal extension of the Standard Model by three right-handed neutrinos) to incorporate inflation and provide a common source for electroweak symmetry breaking and for right-handed neutrino masses. In addition to inflat ...

2006

Baryon and lepton number violation rates across the electroweak crossover

Yannis Burnier, Mikhail Chapochnikov

2006

On the decoupling of heavy modes in Kaluza-Klein theories

Mikhail Chapochnikov

In this paper we examine the 4-dimensional effective theory for the light Kaluza-Klein (KK) modes. Our main interest is in the interaction terms. We point out that the contribution of the heavy KK modes is generally needed in order to reproduce the correct ...

2006

How to find a dark matter sterile neutrino?

Mikhail Chapochnikov, Igor Tkachev, Alexey Boyarsky, Oleg Ruchayskiy

We propose a strategy for how to look for dark matter particles possessing a radiative decay channel and derive constraints on their parameters from observations of x rays from our own Galaxy and its dwarf satellites. When applied to sterile neutrinos in t ...

2006

Opening a new window for warm dark matter

Mikhail Chapochnikov

We explore the range of parameters for dark-matter sterile neutrinos in an extension of the Minimal Standard Model by three singlet fermions with masses below the electroweak scale (the νMSM). This simple model can explain a wide range of phenomena, includ ...

2006

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