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CEUR Workshop Proceedings 2019年 2406卷

作者： Haungs, Andreas Kryukov, Alexander Bychkov, Igor Shigarov, Alexey Kazarina, Yulia Tokareva, Victoria Karlsruhe Institute of Technology Institute for Nuclear Physics Karlsruhe Germany Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics Moscow Russia Matrosov Institute for System Dynamics and Control Theory of Siberian Branch of Russian Academy of Sciences Irkutsk Russia Applied Physics Institute Irkutsk State University Irkutsk Russia

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Lepton flavor violating dark photon

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Physical Review D 2024年第1期109卷 015015-015015页

作者： Alexey S. Zhevlakov Dmitry V. Kirpichnikov Valery E. Lyubovitskij Bogoliubov Laboratory of Theoretical Physics JINR 141980 Dubna Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str. 134 664033 Irkutsk Russia Institute for Nuclear Research of the Russian Academy of Sciences 117312 Moscow Russia Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 D-72076 Tübingen Germany Departamento de Física y Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile Millennium Institute for Subatomic Physics at the High-Energy Frontier (SAPHIR) of ANID Fernández Concha 700 Santiago Chile

We study the possible impact of dark photons on lepton flavor phenomenology. We derive the constraints on nondiagonal dark photon couplings with leptons by analyzing corresponding contributions to lepton anomalous magnetic moments, rare lepton decays, and the prospects of fixed-target experiments aimed at searching for light dark matter based on missing energy/momentum techniques.

关键词： Extensions of gauge sector Phenomenology Weakly interacting massive particles Hypothetical gauge bosons

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Deuteron EDM induced by CP violating couplings of pseudoscalar mesons

arXiv

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arXiv 2020年

作者： Zhevlakov, Alexey S. 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 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

We analyze contributions to the electric dipole (EDM) and Schiff (SFM) moments of deuteron induced by the CP-violating three-pseudoscalar meson couplings using phenomenological Lagrangian approach involving nucleons and pseudoscalar mesons P = π, K, η, η0. Deuteron is considered as a proton-neutron bound state and its properties are defined by one- and two-body forces. One-body forces correspond to a picture there proton and neutron are quasi free constituents of deuteron and their contribution to the deuteron EDM (dEDM) is simply the sum of proton and neutron EDMs. Two-body forces in deuteron are induced by one-meson exchange between nucleons. They produce a contribution to the dEDM, which is estimated using corresponding potential approach. From numerical analysis of nucleon and deuteron EDMs we derive stringent limits on CP-violating hadronic couplings and θ¯ parameter. We showed that proposed measurements of proton and deuteron EDMs at level of ∼ 10−29 by the Store Ring EDM and JEDI Collaborations will provide more stringent upper limits on the CP violating parameters. Copyright © 2020, The Authors. All rights reserved.

关键词： Deuterium

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Tensor meson contribution to the Lamb shift and hyperfine splitting in muonic hydrogen

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Journal of Physics: Conference Series 2020年第1期1435卷

作者： A E Dorokhov A P Martynenko F A Martynenko A E Radzhabov Joint Institute of Nuclear Research BLTP 141980 Moscow region Dubna Russia Samara National Research University named after acad. S.P. Korolev 443086 Samara Russia Matrosov Institute for System Dynamics and Control Theory SB RAS 664033 Irkutsk Russia

We calculate the tensor meson exchange contribution to the interaction operator of muon and proton, which is determined by the tensor meson coupling with two photon state. For the construction of transition form factor T → γγ we use the monopole parametrization over photon four-momenta and experimental data on the decay width ΓTγγ. It is shown that tensor meson f2(1270) exchange gives essential contribution to the Lamb shift in muonic hydrogen ΔΕLs (2P – 2S) which should be taken into account for a comparison with precise experimental data.

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Constraints on CP-odd ALP couplings from EDM limits of fermions.

arXiv

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arXiv 2020年

作者： Kirpichnikov, D.V. Lyubovitskij, Valery E. Zhevlakov, Alexey S. 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 y Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile Department of Physics Tomsk State University Tomsk634050 Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str. 134 Irkutsk664033 Russia

We discuss constraints on soft CP-violating couplings of axion-like particles (ALPs) with photon and fermions by using data on electric dipole moments (EDMs) of Standard Model (SM) particles. In particular, we derive bounds on CP-odd ALP-photon-photon coupling from data of the ACME Collaboration on electron EDM. We also discuss prospects of the Storage Ring experiment to constrain the ALP-photon-photon coupling from data on proton EDM. The regarding constraints from experimental bounds on the muon and neutron EDMs are weak. We set constraint on the CP-odd ALP coupling with electron and derive bounds on combinations of coupling constants, which involve soft CP-violating terms. Finally, we discuss a scenario of inducing of Yukawa-like interaction of SM fermions with ALP through the electro-weak symmetry breaking mechanism. Copyright © 2020, The Authors. All rights reserved.

关键词： Photons

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Test of vector portal with dark fermions in the charge-exchange reactions in the NA64 experiment at CERN SPS

arXiv

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arXiv 2023年

作者： Gninenko, Sergei N. Kirpichnikov, Dmitry 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 Departamento de Física y 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 an experiment to search for dark sector particles in dark photon kinetic mixing model by analyze invisible and semi-invisible decays of neutral mesons M0 = π0, η, η′, ω, f2(1270), produced in the NA64 experiment at the CERN SPS. The approach proposed in Ref. [1] is to use the charge-exchange reactions π− + (A, Z) → M0 + (A, Z − 1);M0 → invisible or semi-invisible of high-energy pions (or kaons) at a nuclei target as a source of M0s, which subsequently decay invisibly into dark sector. This reaction chain would lead to a striking signature of the signal event - the complete disappearance of the beam energy in the setup. Using data obtained from the study of charge-exchange reactions at IHEP (Protvino) and Fermilab (Batavia) we show that the integral cross sections σ for production of the neutral mesons M0 are slightly deviate from phenomenological formula σ ∼ Z2/3, where Z is the nuclei charge. In particular, we present the formulas for the differential and integral sections that explicitly depend on the Mandelstam and Z variables. Derived formulas are used to predict the cross sections as a function of beam energy for several target nuclei, and to estimate the projection sensitivity for the proposed search for the M0 → semi-invisible and M0 → invisible decays through the vector portal to dark sector. Sensitivity to different semi-invisible decay modes of neutral pseudoscalar mesons is studied. © 2023, CC0.

关键词： Hadrons

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Implication of the hidden sub-GeV bosons for the (g - 2)μ, 8Be-4He anomaly, proton charge radius, EDM of fermions and dark axion portal

arXiv

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arXiv 2020年

作者： Kirpichnikov, D.V. Lyubovitskij, Valery E. Zhevlakov, Alexey S. Institute for Nuclear Research 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 Department of Physics Tomsk State University Tomsk634050 Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str. 134 Irkutsk664033 Russia

We discuss new physics phenomenology of hidden scalar (S), pseudoscalar (P), vector (V ) and axial-vector (A) particles coupled to nucleons and leptons, which could give contributions to proton charge radius, (g - 2)μ, 8Be-4He anomaly and electric dipole moment (EDM) of Standard Model (SM) particles. In particular, we estimate sensitivity of NA64μ experiment to observe muon missing energy events involving hidden scalar and vector particles. That analysis is based on GEANT4 Monte Carlo simulation of the signal process of muon scattering off target nuclei μN → μNS(V ) followed by invisible boson decay into Dark Matter (DM) particles, S(V ) → χχ. The existence of light subGeV bosons could possibly explain the muon (g -2) anomaly observed. We also summarize existing bounds on ATOMKI X17(JP= 0-, 1±) boson coupling with neutron, proton and electron. We implement these constraints to estimate the contribution of P, V and A particles to proton charge radius via direct 1-loop calculation of Sachs form factors. The analysis reveals the corresponding contribution is negligible. We also calculate bounds on dark axion portal couplings of dimension-five operators, which contribute to the EDMs of leptons and neutron. Copyright © 2020, The Authors. All rights reserved.

关键词： Bosons

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Updated limits on the CP violating ηππ and η0ππ couplings derived from the neutron EDM

arXiv

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arXiv 2019年

作者： Zhevlakov, Alexey S. 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 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

We complete our derivation of upper limits on the CP violating ηππ and η0ππ couplings from an analysis of their two-loop contributions to the neutron electric dipole moment (nEDM). We use a phenomenological Lagrangian approach which is formulated in terms of hadronic degrees of freedom - nucleons and pseudoscalar mesons. The essential part of the Lagrangian contains the CP violating couplings between η(η0) and pions. Previously, we included photons using minimal substitution in case of the proton and charged pions. Now we extend our Lagrangian by adding the nonminimal couplings, i.e. anomalous magnetic couplings of nucleons with the photon. The obtained numerical upper limits for the ηππ and η0ππ couplings |fηππ(Mη2)| −11 and |fη0ππ(Mη20)| −11 can be useful for the related, planned experiments at the JLab Eta Factory. Using present experimental limits on the nEDM, we derive upper limits on the CP violating θ¯ parameter of θ¯ −10. Copyright © 2019, The Authors. All rights reserved.

关键词： Lagrange multipliers

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New ideas for handling of loop and angular integrals in D-dimensions in QCD

arXiv

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arXiv 2021年

作者： Lyubovitskij, Valery E. Wunder, Fabian Zhevlakov, Alexey S. 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 Department of Physics Tomsk State University Tomsk634050 Russia Bogoliubov Laboratory of Theoretical Physics Joint Institute for Nuclear Research Dubna141980 Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov str. 134 Irkutsk664033 Russia

We discuss new ideas for consideration of loop diagrams and angular integrals in D-dimensions in QCD. In case of loop diagrams, we propose the covariant formalism of expansion of tensorial loop integrals into the orthogonal basis of linear combinations of external momenta. It gives a very simple representation for the final results and is more convenient for calculations on computer algebra systems. In case of angular integrals we demonstrate how to simplify the integration of differential cross sections over polar angles. Also we derive the recursion relations, which allow to reduce all occurring angular integrals to a short set of basic scalar integrals. All order Ε-expansion is given for all angular integrals with up to two denominators based on the expansion of the basic integrals and using recursion relations. A geometric picture for partial fractioning is developed which provides a new rotational invariant algorithm to reduce the number of denominators. © 2021, CC BY.

关键词： Expansion

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BRAKING AND REVERSING SHIP dynamics

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NAVAL ENGINEERS JOURNAL 1970年第1期82卷 65-&页

作者： RUBIS, CJ THE AUTHOR: is Head Control Systems Branch Naval Ship Research and Development Laboratory Annapolis. He is a graduate of the University of Illinois 1956 with a M.S. degree. His employment experience has been with the Argonne National Laboratory (Reactor Control Systems) The Martin Company where he was Senior Engineer on guidance radar and communications system and the U. S. Naval Academy as Assistant Professor electronic committee. He has also been a staff lecturer with Drexel Institute of Technology and the American University. He has published numerous papers and reports in the fields of radar circuit theory ship automation and propulsion dynamics. He was presented the 1968 Melville Award from the Naval Ship Research and Development Laboratory Annapolis in June of this year.

THIS PAPER PRESENTS the results of a ship braking and reversing dynamics study for a COGAG, single screw, ship with a fixed pitch propeller, a reversing reduction gear, and a water brake for dynamic braking of the propeller. A digital computer simulation was used to calculate the major ship and propulsion plant parameters for various propulsion maneuvers including coast down, braking, and reversing. A computer technique for solving the ship propulsion dynamics equations is described, the equations for clutching and braking are derived, and the results of braking and reversing maneuvers for speeds greater than 30 knots are shown in detail for a hypothetical study ship.

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