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Mikhail Chapochnikov

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Publications associées (139)

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A facility to search for hidden particles at the CERN SPS: the SHiP physics case

Lesya Shchutska, Mikhail Chapochnikov, Alexey Boyarsky, Oleg Ruchayskiy, Marco Drewes, Kyrylo Bondarenko, Shintaro Eijima

This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (search for hidden particles) experiment is intended to hunt for new physics in the largely unexplored domain of very weakly interacting particles with masses below ...

Institute of Physics2016

Resonant production of the sterile neutrino dark matter and fine-tunings in the neutrino minimal standard model

Mikhail Chapochnikov

The generation of lepton asymmetry below the electroweak scale has a considerable impact on production of dark matter sterile neutrinos. Oscillations or decays of the heavier sterile neutrinos in the neutrino minimal standard model can give rise to the req ...

American Physical Society2010

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

FCC-hh: The Hadron Collider: Future Circular Collider Conceptual Design Report Volume 3

Yi Zhang, Jan Steggemann, Hua Zhang, Elena Graverini, Pierluigi Bruzzone, Jean-Michel Sallese, Luca Rossi, Mikhail Chapochnikov, Mathias Oleg Knecht, Doohyun Kim, Yu Bai, Fabio Avino, Xavier Buffat, Tatiana Pieloni, Andrea Wulzer, Michael Schenk, Marco Drewes, José Luis Abelleira Fernández, Mithlesh Kumar, Alexandra Sarabando de Carvalho, Leonid Rivkin, Vincenzo D'Auria, Alban Sublet, Alexej Grudiev, Roberto Contino, Francesco Cerutti, Sondre Vik Furuseth, Javier Barranco Garcia, Claudia Tambasco, Sandra Aumon, Agnieszka Chmielinska, Bernhard Auchmann, Lotta Maria Mether, Léon Van Riesen-Haupt

In response to the 2013 Update of the European Strategy for Particle Physics (EPPSU), the Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC study covered an energy-frontier hadron collider ...

2019

The MSM, dark matter and baryon asymmetry of the Universe

Mikhail Chapochnikov

We discuss here a mechanism of baryon asymmetry generation in an extension of the minimal standard model by three right-handed neutrinos with masses smaller than the electroweak scale (the νMSM). © 2006 IOP Publishing Ltd. ...

IOP Publishing2006

Inflation, LHC and the Higgs boson

Mikhail Chapochnikov

After the Higgs boson has been discovered, the Standard Model of particle physics became a confirmed theory, potentially valid up to the Planck scale and allowing one to trace the evolution of the Universe from the inflationary stage till the present days. ...

Elsevier2015

Higgs-dilaton cosmology: An effective field theory approach

Mikhail Chapochnikov, Georgios Karananas, Javier Rubio

The Higgs-dilaton cosmological model is able to describe simultaneously an inflationary expansion in the early Universe and a dark energy dominated stage responsible for the present day acceleration. It also leads to a nontrivial relation between the spect ...

American Physical Society2013

Astrophysical bounds on supersymmetric dark-matter Q- balls

Mikhail Chapochnikov

Stable baryonic Q-balls, which appear in supersymmetric extensions of the Standard Model, could form at the end of cosmological inflation from fragmentation of the Affleck-Dine condensate. We reconsider astrophysical constraints on such Q-balls as dark mat ...

2005

Sterile neutrino dark matter, matter-antimatter separation, and the QCD phase transition

Mikhail Chapochnikov

The Universe may contain sufficiently small size matter-antimatter domains at temperatures of a few hundred MeV, without violating the success of big bang nucleosynthesis. We demonstrate that this possibility enhances the keV scale sterile neutrino product ...

American Physical Society2024

Einstein-Cartan gravity, matter, and scale-invariant generalization (vol 10, 177, 2020)

Mikhail Chapochnikov, Inar Timiryasov, Andrey Shkerin, Sebastian Zell

Springer Nature2021

Restrictions on parameters of sterile neutrino dark matter from observations of galaxy clusters

Mikhail Chapochnikov, Alexey Boyarsky, Oleg Ruchayskiy

We find restrictions on the mass and mixing angle of the dark matter sterile neutrinos using x-ray observations of Coma and Virgo galaxy clusters with XMM-Newton satellite. In the absence of clearly detectable line, we present detailed analysis of various ...

American Physical Society2006

The nuMSM, dark matter and neutrino masses

Mikhail Chapochnikov, Steve Blanchet

We investigate an extension of the Minimal Standard Model by right-handed neutrinos (the νMSM) to incorporate neutrino masses consistent with oscillation experiments. Within this theory, the only candidates for dark matter particles are sterile right-hande ...

2005

Higgs inflation in Einstein-Cartan gravity (vol 02, 008, 2021)

Mikhail Chapochnikov, Inar Timiryasov, Andrey Shkerin, Sebastian Zell

IOP Publishing Ltd2021

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

Fermion number violating effects in low scale leptogenesis

Mikhail Chapochnikov, Shintaro Eijima

The existence of baryon asymmetry and dark matter in the Universe may be related to CP-violating reactions of three heavy neutral leptons (HNLs) with masses well below the Fermi scale. The dynamical description of the lepton asymmetry generation, which is ...

Elsevier2017

Constraints on sterile neutrino as a dark matter candidate from the diffuse X-ray background

Mikhail Chapochnikov, Alexey Boyarsky, Oleg Ruchayskiy

Sterile neutrinos with masses in the kilo-electronvolt range are viable candidates for the warm dark matter. We analyse existing data for the extragalactic diffuse X-ray background for signatures of sterile neutrino decay. The absence of a detectable signa ...

2006

Observation of Collider Neutrinos without Final State Muons with the SND@LHC Experiment

Olivier Schneider, Aurelio Bay, Lesya Shchutska, Elena Graverini, Jan Steggemann, Konstantin Androsov, Serhii Cholak, Ettore Zaffaroni, Anna Mascellani, Mikhail Chapochnikov, Carina Trippl, Federico Ronchetti, Anni Matilda Kauniskangas, Paul Théodore Gabriel Pablo De Bryas Dexmiers d'Archiac, Zhenyu Yang

We report the observation of neutrino interactions without final state muons at the LHC, with a significance of 6.4σ. A dataset of proton-proton collisions at s=13.6 TeV collected by SND@LHC in 2022 and 2023 is used, corresponding to an integrated luminosi ...

American Physical Society (APS)2025

The nuMSM, dark matter and neutrino masses

Mikhail Chapochnikov

An extension of the minimal standard model by three right-handed neutrinos with masses smaller than the electroweak scale (the νMSM) allows to explain simultaneously neutrino oscillations and dark matter in the universe. We show how to fix the absolute val ...

IOP Publishing2006

Lightest sterile neutrino abundance within the vMSM (vol 1, 091, 2007)

Mikhail Chapochnikov

Springer Nature2015

Kaon physics within nuMSM

Mikhail Chapochnikov

2008