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Mikhail Chapochnikov

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Publications associées (139)

Hidden and explicit quantum scale invariance

Mikhail Chapochnikov, Thibault Voumard, Sander Johannes Nicolaas Mooij

There exist renormalization schemes that explicitly preserve the scale invariance of a theory at the quantum level. Imposing a scale-invariant renormalization breaks renormalizability and induces new nontrivial operators in the theory. In this work, we stu ...

American Physical Society2019

Chiral charge dynamics in Abelian gauge theories at finite temperature

Mikhail Chapochnikov, Adrien Florio, Daniel Garcia Figueroa

We study fermion number non-conservation (or chirality breaking) in Abelian gauge theories at finite temperature. We consider the presence of a chemical potential mu for the fermionic charge, and monitor its evolution with real-time classical lattice simul ...

Springer Nature2019

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

Manuel Bauer, Luca Rossi, Thomas Rizzo, François Robert, Jean-Michel Sallese, Pierluigi Bruzzone, Benedikt Moser, Mikhail Chapochnikov, Bernhard Auchmann, Jeffrey Alan Hubbell, Nicolas Andreini, Alban Sublet, Anatole von Lilienfeld, Mathias Oleg Knecht, Yu Bai, Jorg Wenninger, Michele Cascella, Marc-Olivier Sauvain, Tatiana Pieloni, Pablo Marcelo Perez Garcia, Rui Ning Wang, Leonid Rivkin, Hua Zhang, Xavier Buffat, Mingkui Wang, Andrea Wulzer, Martin Vogel, Nathalie Sophie Adeline Serra, Sandra Aumon, Alexandra Sarabando de Carvalho, Roberto Franceschini, Karin Irmgard Löw, Lucia Jimenez Rojo, Jie Gao, Giuseppe Montenero, Marco Drewes, Craig Nowell, Peter Michael Vogel, Shourya Dutta Gupta, Jairo Camilo Quijano Perez, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

Parameter space of baryogenesis in the nu MSM

Mikhail Chapochnikov, Shintaro Eijima, Inar Timiryasov

The Standard Model accompanied with two right-handed neutrinos with masses below the weak scale can explain the observed baryon asymmetry of the Universe. Moreover, this model is at least partially testable in the forthcoming experiments such as NA62, SHiP ...

Springer Nature2019

Fast simulation of muons produced at the SHiP experiment using Generative Adversarial Networks

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

This paper presents a fast approach to simulating muons produced in interactions of the SPS proton beams with the target of the SHiP experiment. The SHIP experiment will be able to search for new long-lived particles produced in a 400 GeV/c SPS proton beam ...

2019

Asymptotic scale invariance and its consequences

Mikhail Chapochnikov, Kengo Shimada

Scale invariance supplemented by the requirement of the absence of new heavy particles may play an important role in addressing the hierarchy problem. We discuss how the Standard Model may become scale invariant at the quantum level above a certain value o ...

American Physical Society2019

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

Manuel Bauer, Luca Rossi, François Robert, Jean-Michel Sallese, Pierluigi Bruzzone, Mikhail Chapochnikov, Bernhard Auchmann, Alban Sublet, Mathias Oleg Knecht, Yu Bai, Jorg Wenninger, Tatiana Pieloni, Leonid Rivkin, Hua Zhang, Xavier Buffat, Andrea Wulzer, Martin Vogel, Sandra Aumon, Alexandra Sarabando de Carvalho, Giuseppe Montenero, Marco Drewes, Doohyun Kim, Frank Zimmermann, José Luis Abelleira Fernández, Alexej Grudiev, Fabio Avino, Massimo Giovannozzi, Patrik Gonçalves Jorge, Francesco Cerutti, Javier Barranco Garcia, Roberto Contino, Rudiger Schmidt, Claudia Tambasco, Michael Schenk, Yi Zhang, Agnieszka Chmielinska, Luca Bottura, Lotta Maria Mether, Mithlesh Kumar, Vincenzo D'Auria, Sondre Vik Furuseth, , , , , ,

Sensitivity of the SHiP experiment to Heavy Neutral Leptons

Florian Maria Wurm, Aurelio Bay, Mikhail Chapochnikov, Guido Haefeli, Alexey Boyarsky, Hans Dijkstra, Sun Hee Kim, Oleg Ruchayskiy, Nathalie Sophie Adeline Serra, Lesya Shchutska, Adriano Pastore, Nikolaos Charitonidis, Johannes Richard Cornelis Geerit Kruis, Erica Manfredi, Sargis Hakobyan, Eirini Koukovini Platia, Jean-Loup Tastet, Sergei Smirnov, Anton Petrov, Inar Timiryasov, Maria Elena Stramaglia, Federico Leo Redi, Elena Graverini, Ekaterina Kuznetsova

Heavy Neutral Leptons (HNLs) are hypothetical particles predicted by many extensions of the Standard Model. These particles can, among other things, explain the origin of neutrino masses, generate the observed matter-antimatter asymmetry in the Universe an ...

Springer Nature2019

FCC-ee: The Lepton Collider: Future Circular Collider Conceptual Design Report Volume 2

Manuel Bauer, Luca Rossi, François Robert, Jean-Michel Sallese, Pierluigi Bruzzone, Mikhail Chapochnikov, Bernhard Auchmann, Alban Sublet, Mathias Oleg Knecht, Yu Bai, Jorg Wenninger, Tatiana Pieloni, Leonid Rivkin, Hua Zhang, Xavier Buffat, Andrea Wulzer, Martin Vogel, Sandra Aumon, Alexandra Sarabando de Carvalho, Giuseppe Montenero, Marco Drewes, Doohyun Kim, Frank Zimmermann, José Luis Abelleira Fernández, Alexej Grudiev, Fabio Avino, Massimo Giovannozzi, Patrik Gonçalves Jorge, Francesco Cerutti, Javier Barranco Garcia, Roberto Contino, Rudiger Schmidt, Claudia Tambasco, Michael Schenk, Yi Zhang, Georgi Gorine, Agnieszka Chmielinska, Luca Bottura, Lotta Maria Mether, Mithlesh Kumar, Vincenzo D'Auria, , , , , , , ,

Conformal symmetry: Towards the link between the Fermi and the Planck scales

Mikhail Chapochnikov, Andrey Shkerin

If the mass of the Higgs boson is put to zero, the classical Lagrangian of the Standard Model (SM) becomes conformally invariant (CI). Taking into account quantum non-perturbative QCD effects violating CI leads to electroweak symmetry breaking with the sca ...

ELSEVIER SCIENCE BV2018

Gravity, scale invariance and the hierarchy problem

Mikhail Chapochnikov, Andrey Shkerin

Combining the quantum scale invariance with the absence of new degrees of freedom above the electroweak scale leads to stability of the latter against perturbative quantum corrections. Nevertheless, the hierarchy between the weak and the Planck scales rema ...

Springer Nature2018

Freeze-out of baryon number in low-scale leptogenesis

Mikhail Chapochnikov, Shintaro Eijima, Inar Timiryasov

Low-scale leptogenesis provides an economic and testable description of the origin of the baryon asymmetry of the Universe. In this scenario, the baryon asymmetry of the Universe is reprocessed from the lepton asymmetry by electroweak sphaleron processes. ...

Iop Publishing Ltd2017

Polarization of photons emitted by decaying dark matter

Mikhail Chapochnikov, Anna Tokareva

Radiatively decaying dark matter may be searched through investigating the photon spectrum of galaxies and galaxy clusters. We explore whether the properties of dark matter can be constrained through the study of a polarization state of emitted photons. St ...

Elsevier2017

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

Gauge coupling unification without leptoquarks

Mikhail Chapochnikov, Georgios Karananas

We propose an interpretation of the gauge coupling unification scale which is not related to any new particle threshold. We revisit Grand Unified Theories and show that it is possible to completely eliminate the scalar as well as vector leptoquarks from th ...

2017

The active muon shield in the SHiP experiment

Sebastian Gerlach, Aurelio Bay, Mikhail Chapochnikov, Alexey Boyarsky, Hans Dijkstra, Sun Hee Kim, Oleg Ruchayskiy, Lesya Shchutska, Sergei Smirnov, Inar Timiryasov, Federico Leo Redi, Elena Graverini, Ekaterina Kuznetsova

The SHiP experiment is designed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. An essential task for the experiment is to keep the Standard Model background leve ...

2017

Scale-invariant alternatives to general relativity. II. Dilaton properties

Mikhail Chapochnikov, Georgios Karananas

In the present paper, we revisit gravitational theories which are invariant under TDiffs-transverse (volume-preserving) diffeomorphisms and global scale transformations. It is known that these theories can be rewritten in an equivalent diffeomorphism-invar ...

American Physical Society2016

Search for Heavy Right Handed Neutrinos at the FCC-ee

Mikhail Chapochnikov, Elena Graverini

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

Model for superconductivity at any temperature

Yannis Burnier, Mikhail Chapochnikov, Eray Sabancilar

We construct a 2 + 1 dimensional model that sustains superconductivity at all temperatures. This is achieved by introducing a Chern-Simons mixing term between two Abelian gauge fields A and Z. The superfluid is described by a complex scalar charged under Z ...

American Physical Society2016

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

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

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

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Giovanni Migliorati

Andrea Thamm

Florian Patrick Marie Daniel De la Barre De Nanteuil

Andrey Denisov

Doohyun Kim

Frank Zimmermann

José Luis Abelleira Fernández

Alexej Grudiev

Philippe Schwaller

Fabio Avino

Darius Constantin Merk

Massimo Giovannozzi

Arturo Rivetti

Patrik Gonçalves Jorge

Francesco Cerutti

Ting-Yu Lee

Dragos-Adrian Seredinschi

Leonid Kahle

Juan Federico Esteban Müller

Javier Barranco Garcia

Roberto Contino

Eva Maria Rodriguez Franco

Beat Mueller

Rudiger Schmidt

Claudia Tambasco

Abdel Perez Hernandez

Shang-Jung Wu

José Luis Rivera Gutiérrez

Agnieszka Chmielinska

Lorena Gonçalves de Alcântara e Freitas Krikler

Candice Megan T Young

Rafael Amorim Leandro De Castro Amoedo

Xingyu Wu

Amirhossein Saba Shirvan

Wanderson Oliveira Da Silva

Mukesh Kumar Tripathi

Léon Van Riesen-Haupt

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

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

Léon Van Riesen-Haupt

In response to the 2013 Update of the European Strategy for Particle Physics, the Future Circular Collider (FCC) study was launched, as an international collaboration hosted by CERN. This study covers a highest-luminosity high-energy lepton collider (FCC-e ...

2019