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Mikhail Chapochnikov

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Related publications (139)

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Einstein-Cartan Portal to Dark Matter

Mikhail Chapochnikov, Inar Timiryasov, Andrey Shkerin, Sebastian Zell

It is well known since the works of Utiyama and Kibble that the gravitational force can be obtained by gauging the Poincare group, which puts gravity on the same footing as the standard model fields. The resulting theory-Einstein-Cartan gravity-inevitably ...

AMER PHYSICAL SOC2021

Scale invariance, unimodular gravity and dark energy

Mikhail Chapochnikov, Daniel Zenhäusern

We demonstrate that the combination of the ideas of unimodular gravity, scale invariance, and the existence of an exactly massless dilaton leads to the evolution of the universe supported by present observations: inflation in the past, followed by the radi ...

2009

FCC Physics Opportunities: Future Circular Collider Conceptual Design Report Volume 1

Jie Gao, Caroline Antonioli Pletscher, Emilie Jocelyne Marc Solange Collot, Mathias Béguin, Beat Mueller, Abdel Perez Hernandez, Dora Patricia Valente Salgueiro, Michael Andrew Theodore Fowler, Tobias Hurth, Yi Zhang, Jan Steggemann, Hua Zhang, Elena Graverini, Jeffrey Alan Hubbell, Pierluigi Bruzzone, Jean-Michel Sallese, Mingkui Wang, Luca Rossi, Mikhail Chapochnikov, Thomas Rizzo, Rui Ning Wang, Mathias Oleg Knecht, Doohyun Kim, Yu Bai, Simon Van Mulders, Tatiana Pieloni, Nathalie Sophie Adeline Serra, Shourya Dutta Gupta, Juan Federico Esteban Müller, Philippe Schwaller, Xabier Sarasola Martin, Andrea Wulzer, Florian Patrick Marie Daniel De la Barre De Nanteuil, Rahul Kumar Gupta, Xavier Buffat, Michele Cascella, Fabio Avino, Andrey Denisov, Nicolas Andreini, Michael Schenk, Benedikt Moser, Anatole von Lilienfeld, Lorena Gonçalves de Alcântara e Freitas Krikler, Alexej Grudiev, José Luis Abelleira Fernández, Rafael Amorim Leandro De Castro Amoedo, Mukesh Kumar Tripathi, Francesco Cerutti, Sondre Vik Furuseth, Roberto Franceschini, Marco Drewes, Dragos-Adrian Seredinschi, Giovanni Migliorati, Vincenzo D'Auria, Ting-Yu Lee, Leonid Kahle, Luca Vecchi, Javier Barranco Garcia, Shang-Jung Wu, Guang Li, Alban Sublet, Darius Constantin Merk, Roberto Contino, Claudia Tambasco, Delio Aleardo Vicini, Xingyu Wu, Pablo Marcelo Perez Garcia, Jairo Camilo Quijano Perez, Andrea Thamm, Georgi Gorine, Jun Gu, Candice Megan T Young, Wanderson Oliveira Da Silva, Bernhard Auchmann, Léon Van Riesen-Haupt, Marc-Olivier Sauvain, Leonid Rivkin, Alexandra Sarabando de Carvalho, Soumya Banerjee, Agnieszka Chmielinska, Kim-Manuel Klein, Amirhossein Saba Shirvan, Craig Nowell, Peter Michael Vogel, Eva Maria Rodriguez Franco, José Luis Rivera Gutiérrez, Florent Philippe Maurice Duval, Lotta Maria Mether, Özdemir Can Kara, Franco Moretti, Charlotte Lorin, Sandra Aumon, Karin Irmgard Löw, Lucia Jimenez Rojo, Arturo Rivetti, Maria Rosaria Antonelli, Maximilian Nikolaus Bauer

We review the physics opportunities of the Future Circular Collider, covering its e(+)e(-), pp, ep and heavy ion programmes. We describe the measurement capabilities of each FCC component, addressing the study of electroweak, Higgs and strong interactions, ...

2019

Nonrenormalizable theories and finite formulation of QFT

Mikhail Chapochnikov

In this paper, we show how the finite formulation of quantum field theory based on Callan-Symanzik equations can be generalized to the case of nonrenormalizable theories. We derive an equation for effective action for an arbitrary single scalar field theor ...

AMER PHYSICAL SOC2025

The SHiP experiment at the proposed CERN SPS Beam Dump Facility

Aurelio Bay, Guido Haefeli, Lesya Shchutska, Elena Graverini, Federico Leo Redi, Maria Elena Stramaglia, Ana Bárbara Rodrigues Cavalcante, Mikhail Chapochnikov, Inar Timiryasov, Alexandre Emmanuel Grandchamp

The Search for Hidden Particles (SHiP) Collaboration has proposed a general-purpose experimental facility operating in beam-dump mode at the CERN SPS accelerator to search for light, feebly interacting particles. In the baseline configuration, the SHiP exp ...

2022

QFT without infinities and hierarchy problem

Mikhail Chapochnikov, Sander Johannes Nicolaas Mooij

The standard way to do computations in Quantum Field Theory (QFT) often results in the requirement of dramatic cancellations between contributions induced by a "heavy" sector into the physical observables of the "light" (or low energy) sector - the phenome ...

ELSEVIER2023

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

Higgs inflation: consistency and generalisations

Mikhail Chapochnikov, Sergey Sibiryakov, Amaury Magnin

We analyse the self-consistency of inflation in the Standard Model, where the Higgs field has a large non-minimal coupling to gravity. We determine the domain of energies in which this model represents a valid effective field theory as a function of the ba ...

Springer Nature2011

Cosmic Matter-Antimatter Separation and Sterile Neutrino Dark Matter

Mikhail Chapochnikov

The lattice studies provided evidence of a smooth crossover between the hadronic and quark-gluon phases at high temperatures and zero chemical potential for baryonic number. We argue that these simulations may not rule out relatively weekly first-order pha ...

Sissa Medialab Srl2024

Living beyond the edge: Higgs inflation and vacuum metastability

Mikhail Chapochnikov, Javier Rubio

The measurements of the Higgs mass and top Yukawa coupling indicate that we live in a very special universe, at the edge of the absolute stability of the electroweak vacuum. If fully stable, the Standard Model (SM) can be extended all the way up to the inf ...

American Physical Society2015

Standard Model Higgs boson mass from inflation: two loop analysis

Mikhail Chapochnikov

We extend the analysis of [1] of the Standard Model Higgs inflation accounting for two-loop radiative corrections to the effective potential. As was expected, higher loop effects result in some modification of the interval for allowed Higgs masses mmin < m ...

2009

Spontaneously broken conformal symmetry: dealing with the trace anomaly

Mikhail Chapochnikov, Alexander Monin, Roberta Armillis

The majority of renormalizable field theories possessing the scale invariance at the classical level exhibits the trace anomaly once quantum corrections are taken into account. This leads to the breaking of scale and conformal invariance. At the same time ...

Springer Nature2013

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

Freeze-in and freeze-out generation of lepton asymmetries after baryogenesis in the nu MSM

Mikhail Chapochnikov, Inar Timiryasov, Shintaro Eijima

The nu MSM an extension of the Standard Model by three relatively light singlet Majorana fermions N-1,N-2,N-3 allows for the generation of lepton asymmetry which is several orders of magnitude larger than the observed baryon asymmetry of the Universe. The ...

IOP Publishing Ltd2022

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

Quantum effects in Palatini Higgs inflation

Mikhail Chapochnikov, Andrey Shkerin, Sebastian Zell

We study quantum effects in Higgs inflation in the Palatini formulation of gravity, in which the metric and connection are treated as independent variables. We exploit the fact that the cutoff, above which perturbation theory breaks down, is higher than th ...

IOP PUBLISHING LTD2020

Search for Heavy Right Handed Neutrinos at the FCC-ee

Elena Graverini, Mikhail Chapochnikov

The Standard Model of particle physics is still lacking an understanding of the generation and nature of neutrino masses. A favorite theoretical scenario (the see-saw mechanism) is that both Dirac and Majorana mass terms are present, leading to the existen ...

Elsevier Science Bv2016

Higgs inflation at the critical point

Mikhail Chapochnikov

Higgs inflation can occur if the Standard Model (SM) is a self-consistent effective field theory up to inflationary scale. This leads to an upper bound on the top Yukawa coupling, y(t)(phys) < y(t)(crit) and thus on the mass of the top quark m(t). If m(t) ...

Elsevier Science Bv2014

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

The magnet of the scattering and neutrino detector for the SHiP experiment at CERN

Aurelio Bay, Ekaterina Kuznetsova, Guido Haefeli, Lesya Shchutska, Sun Hee Kim, Elena Graverini, Federico Leo Redi, Maria Elena Stramaglia, Ana Bárbara Rodrigues Cavalcante, Mikhail Chapochnikov, Alexey Boyarsky, Oleg Ruchayskiy, Nikolaos Charitonidis, Inar Timiryasov, Sebastian Gerlach, Alexandre Emmanuel Grandchamp, Jean-Loup Tastet

The Search for Hidden Particles (SHiP) experiment proposal at CERN demands a dedicated dipole magnet for its scattering and neutrino detector. This requires a very large volume to be uniformly magnetized at B > 1.2 T, with constraints regarding the inner i ...

2020