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arXiv 2022年

作者： Zhevlakov, Alexey S. Kirpichnikov, Dmitry V. Lyubovitskij, Valery E. Bogoliubov Laboratory of Theoretical Physics JINR Dubna 141980 Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str. 134 Irkutsk664033 Russia Institute for Nuclear Research of the Russian Academy of Sciences Moscow117312 Russia Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 TübingenD-72076 Germany Departamento de Física Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile of ANID Fernández Concha 700 Santiago Chile Department of Physics Tomsk State University Tomsk634050 Russia Tomsk Polytechnic University Tomsk634050 Russia

The link between ordinary Standard model (SM) photon and both dark photon and axion like particle (ALP) can be introduced through the dark axion portal coupling. Given the dark axion portal setup, in the present paper we refer the dark photon as the mediator between SM and dark matter (DM) particles, implying that it decays predominantly into pair of DM fermions. Furthermore, we discuss in detail the implication of the dark axion portal scenario for the lepton (electron and muon) fixed target experiments. In particular, for the specific fixed target facility we study the missing energy signatures of the dark photon production followed by its invisible decay into stable DM particles. We investigated the potential to probe dark axion portal vertices with regarding signatures and derive the expected sensitivities of NA64e, NA64µ, LDMX and M3. Moreover, we estimated the expected reach of NA64e from the projected statistics of the J/ψ vector meson invisible decays. We also recasted BaBar monophoton bounds for the specific dark axion portal scenario. In addition, we modified the dark axion portal setup by including in the model both the hadron and lepton specific ALP couplings. As the result, we obtain the bounds on the combination of fermion-specific couplings of ALP from the fixed target experiments. We discuss the implication of the modified dark axion portal scenario for the electric dipole moments (EDM) of SM fermions. In addition, we derived the novel constraints on the combination of the CP-violating neutron-specific ALP couplings from the existing bounds on neutron EDM by taking into account the neutron anomalous magnetic moment. © 2022, CC BY.

关键词： Galaxies

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Bounds on rare decays of η and η0 mesons from the neutron EDM

arXiv

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arXiv 2018年

作者： Zhevlakov, Alexey S. Gorchtein, Mikhail Hiller Blin, Astrid N. Gutsche, Thomas Lyubovitskij, Valery E. Department of Physics Tomsk State University Tomsk634050 Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str. 134 Irkutsk664033 Russia Institut für Kernphysik Johannes Gutenberg-Universität Mainz Germany PRISMA Cluster of Excellence Johannes Gutenberg-Universität Mainz Germany Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 TübingenD-72076 Germany Departamento de Física y Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile Laboratory of Particle Physics Tomsk Polytechnic University Tomsk634050 Russia

We provide model-independent bounds on the rates of rare decays η(η0) → ππ based on experimental limits on the neutron electric dipole moment (nEDM). Starting from phenomenological η(η0)ππ couplings, the nEDM arises at two loop level. The leading-order relativistic ChPT calculation with the minimal photon coupling to charged pions and a proton inside the loops leads to a finite, counter term-free result. This is an improvement upon previous estimates which used approximations in evaluating the two loop contribution and were plagued by divergences. While constraints on the η(η0)ππ couplings in our phenomenological approach are somewhat milder than in the picture with the QCD θ-term, our calculation means that whatever the origin of these couplings, The decays η(η0) → 2π will remain unobservable in the near future. Copyright © 2018, The Authors. All rights reserved.

关键词： Bosons

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A VLF-based technique in applications to digital control of nonlinear hybrid multirate systems

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AIP Conference Proceedings 2017年第1期1798卷

作者： Stanislav Vassilyev Sergey Ulyanov Nikolay Maksimkin 1V.A. Trapeznikov Institute of Control Sciences of Russian Academy of Sciences 117997 Profsoyuznaya str. 65 Moscow RUSSIAN FEDERATION 2Lomonosov Moscow State University 119991 Leninskie Gory GSP-1 Moscow RUSSIAN FEDERATION 3Matrosov Institute for System Dynamics and Control Theory of Siberian Branch of Russian Academy of Sciences 664033 Lermontov str. 134 Post Box 292 Irkutsk RUSSIAN FEDERATION

In this paper, a technique for rigorous analysis and design of nonlinear multirate digital control systems on the basis of the reduction method and sublinear vector Lyapunov functions is proposed. The control system model under consideration incorporates continuous-time dynamics of the plant and discrete-time dynamics of the controller and takes into account uncertainties of the plant, bounded disturbances, nonlinear characteristics of sensors and actuators. We consider a class of multirate systems where the control update rate is slower than the measurement sampling rates and periodic non-uniform sampling is admitted. The proposed technique does not use the preliminary discretization of the system, and, hence, allows one to eliminate the errors associated with the discretization and improve the accuracy of analysis. The technique is applied to synthesis of digital controller for a flexible spacecraft in the fine stabilization mode and decentralized controller for a formation of autonomous underwater vehicles. Simulation results are provided to validate the good performance of the designed controllers.

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Probing leptophobic dark sector with a pseudoscalar portal in the NA64 experiment at CERN

arXiv

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arXiv 2024年

作者： Gninenko, Sergei N. Kirpichnikov, Dmitry V. Krasnikov, Nikolai V. Kuleshov, Sergey Lyubovitskij, Valery E. Zhevlakov, Alexey S. Institute for Nuclear Research The Russian Academy of Sciences Moscow117312 Russia of ANID Fernández Concha 700 Santiago Chile Center for Theoretical and Experimental Particle Physics Facultad de Ciencias Exactas Universidad Andres Bello Fernandez Concha 700 Santiago Chile Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 TübingenD-72076 Germany Departamento de Física Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile Bogoliubov Laboratory of Theoretical Physics JINR Dubna141980 Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str. 134 Irkutsk664033 Russia

We consider the possibility of discovering a light pseudoscalar particle a, which could the axion or an axion-like particle (ALP), interacting mainly with quarks using the electron and photon scattering reaction chain e + Z → e + γ + Z;γ + Z → a + Z on nuclei in the NA64 experiment at the CERN SPS. New bounds on the coupling strengths of the axion/ALP with quarks and of pseudoscalar mesons P = π, η, η′ with dark fermions are obtained by using existing upper bounds on invisible decay modes of P s including those recently derived by NA64. We also study a scenario when the a plays the role of a messenger in the communication between our world and the dark sector. © 2024, CC BY.

关键词： Inelastic scattering

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Lepton phenomenology of Stueckelberg portal to dark sector

arXiv

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arXiv 2021年

作者： Kachanovich, Aliaksei Kovalenko, Sergey Kuleshov, Serguei Lyubovitskij, Valery E. Zhevlakov, Alexey S. Wolfgang-Gaede-Straße 1 Karlsruhe76131 Germany Ruder Boskovic Institute Bijenicka cesta 54 Zagreb10000 Croatia Departamento de Ciencias Físicas Universidad Andres Bello Sazié 2212 Piso 7 Santiago Chile of ANID Fernández Concha 700 Santiago Chile Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile Bogoliubov Laboratory of Theoretical Physics JINR Dubna141980 Russia Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 TübingenD-72076 Germany Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str. 134 Irkutsk664033 Russia

We propose an extension of the Standard Model (SM) with a UA′(1) gauge invariant dark dector connected to the SM via a new portal — the Stueckelberg portal, arising in the framework of dark photon A′ mass generation via Stueckelberg mechanism. This portal opens through the effective dim=5 operators constructed from the covariant term of the auxiliary Stueckelberg scalar field σ providing flavor non-diagonal renormalizable couplings of both σ and A′ to the SM fermions ψ. The Stueckelberg scalar plays a role of Goldstone boson in the generation of mass of the Dark Photon. Contrary to the conventional kinetic mixing portal, in our scenario flavor diagonal A′ψ couplings are not proportional to the fermion charges and are, in general, flavor nondiagonal. These features drastically change the phenomenology of dark photon A′ relaxing or avoiding some previously established experimental constraints. We focus on the phenomenology of the described scenario of the Stueckelberg portal in the lepton sector and analyze the contribution of the dark sector fields A′ to the anomalous magnetic moment of muon (g−2)µ, lepton flavor violating decays li → lkγ and µ−e conversion in nuclei. We obtain limits on the model parameters from the existing data on the corresponding observables. © 2021, CC BY.

关键词： Fermions

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Identification of the energy system critical elements using the PARMONC library

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Journal of Physics: Conference Series 2021年第1期1715卷

作者： A V Edelev M A Marchenko O Yu Basharina Melentiev Energy Systems Institute SB RAS Lermontov St. 130 Irkutsk Russia 664033 Institute of Computational Mathematics and Mathematical Geophysics SB RAS 6 Ac. Lavrentieva ave. Novosibirsk Russia 630090 Novosibirsk State University Novosibirsk-90 2 Russia 630090 Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov St. 134 Irkutsk Russia 664033

In this paper, we presented a Monte Carlo-based approach for vulnerability analyse of energy systems. For high-performance Monte Carlo simulation the PARMONC software library was used. The PARMONC is implemented on high-performance clusters of the Siberian Supercomputer Center. The PARMONC effectively launches parallel stochastic simulation on supercomputers with different architectures. The proposed approach was applied was applied for the identification and ranking the most important elements of a real-world natural gas supply system.

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Dark SU(2) Stueckelberg portal

arXiv

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arXiv 2022年

作者： Lyubovitskij, Valery E. Zhevlakov, Alexey S. Kachanovich, Aliaksei Kuleshov, Serguei Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 TübingenD-72076 Germany Departamento de Física Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile of Anid Fernández Concha 700 Santiago Chile Bogoliubov Laboratory of Theoretical Physics Jinr Dubna141980 Russia Matrosov Institute for System Dynamics and Control Theory Sb Ras Lermontov str. 134 Irkutsk664033 Russia Rudjer Bošković Institute Division of Theoretical Physics Bijenićka 54 ZagrebHR-10000 Croatia Departamento de Ciencias Físicas Universidad Andres Bello Sazié 2212 Piso 7 Santiago Chile

We study the non-Abelian SU(2)Dextension of the U(1)DStueckelberg portal, which plays the role of mediator between the Standard Model (SM) and dark sector (DS). This portal is specified by the Stueckelberg mechanism for generation of dark gauge boson masses. The proposed U(1)D⊗ SU(2)DStueckelberg portal has a connection with SM matter fields, in analogy with the familon model. We derive bounds on the couplings of dark portal bosons and SM particles, which govern diagonal and nondiagonal flavor transitions of quarks and leptons. © 2022, CC BY.

关键词： Bosons

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Probing invisible vector meson decay mode with hadronic beam in the NA64 experiment at SPS/CERN

arXiv

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arXiv 2023年

作者： Zhevlakov, Alexey S. Kirpichnikov, Dmitry V. Gninenko, Sergei N. Kuleshov, Sergey Lyubovitskij, Valery E. Bogoliubov Laboratory of Theoretical Physics Jinr Dubna141980 Russia Matrosov Institute for System Dynamics and Control Theory Sb Ras Lermontov str. 134 Irkutsk664033 Russia Institute for Nuclear Research of the Russian Academy of Sciences Moscow117312 Russia of Anid Fernández Concha 700 Santiago Chile Center for Theoretical and Experimental Particle Physics Facultad de Ciencias Exactas Universidad Andres Bello Fernandez Concha 700 Santiago Chile Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 TübingenD-72076 Germany Departamento de Física Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile

We test a novel idea of using a π- beam in the fixed-target experiments to search for New Physics in the events with missing energy. Bounds for invisible vector ρ meson decay were derived, analyzed, and compared with the current limits on searching Dark Matter in the accelerator based experiments. We demonstrate that the new approach can be effective tool to probe sub-GeV Dark Matter parameter space. Copyright © 2023, The Authors. All rights reserved.

关键词： Dark Matter

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Impulse position control for differential inclusions

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AIP Conference Proceedings 2018年第1期2048卷

作者： I. A. Finogenko A. N. Sesekin 1Matrosov Institute for System Dynamics and Control Theory Siberian Branch of Russian Academy of Sciences 134 S. Lermontov Irkutsk 664033 Russia 2Ural Federal University 19 S. Mira Ekaterinburg 620002 Russia 3N. N. Krasovskii Institute of Mathematics and Mechanics Ural Division of Russian Academy of Sciences 16 S. Kovalevskaya Ekaterinburg 620990 Russia

For a nonlinear control system, presented in the form of a differential inclusion with impulse control, the concept of the impulse-sliding regime generated by the positional impulse control is defined. The basis of formalization is a discrete scheme. It is shown that the impulse-sliding regime satisfies some differential inclusion. Illustrative examples are given.

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Air pollution and population morbidity forecasting with artificial neural networks

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IOP Conference Series: Earth and Environmental Science 2018年第1期211卷

作者： A Yu Gornov T S Zarodnyuk N V Efimova Institute for System Dynamics and Control Theory Siberian Branch of Russian Academy of Sciences Lermontov str. 134 Post Box 64033 Irkutsk Russia East-Siberian Institute of Medical and Ecological Research 12a District 3 665827 Angarsk Russia

Incidence prediction models for urban population have not yielded consistent or highly accurate results. The complex nature of the interrelationship between 'environmental factors and incidence' has many nonlinear associations with outcomes. We explore artificial neural networks (ANNs) to predict the complex interactions between the risk factors of incidence among the urban population. ANN modeling using a standard feed-forward, back-propagation neural network with three layers (i.e., an input layer, a hidden layer, and an output layer) is used to predict the incidences of diseases of children and adults. A receiver-operating characteristic (ROC) analysis is used to assess the model accuracy. We develop a mathematical model taking into account factors of natural, anthropogenic, and social environments. The model effectiveness is proved by computing experiments for the Bratsk industrial centre (Irkutsk region, Russia). Optimal air pollution levels are offered to achieve a background morbidity level among different age groups of the population. The prediction of incidence is most accurate when using the ANN model with several univariate influences on the outcome. An incorporation of some computerized learning systems might improve decision making and outcome prediction.

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