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Lepton phenomenology of Stueckelberg portal to dark sector

Physical Review D 2022年第7期105卷 075004-075004页

作者： Aliaksei Kachanovich Sergey Kovalenko Serguei Kuleshov Valery E. Lyubovitskij Alexey S. Zhevlakov Institute for Theoretical Particle Physics (TTP) Karlsruhe Institute of Technology (KIT) Wolfgang-Gaede-Straße 1 76131 Karlsruhe Germany Ruder Boskovic Institute Bijenicka cesta 54 10000 Zagreb Croatia Departamento de Ciencias Físicas Universidad Andres Bello Sazié 2212 Piso 7 Santiago Chile Millennium Institute for Subatomic Physics at the High-Energy Frontier (SAPHIR) of ANID Fernández Concha 700 Santiago Chile Centro Científico Tecnológico de Valparaíso-CCTVal Universidad Técnica Federico Santa María Casilla 110-V Valparaíso Chile Institut für Theoretische Physik Universität Tübingen Kepler Center for Astro and Particle Physics Auf der Morgenstelle 14 D-72076 Tübingen Germany Bogoliubov Laboratory of Theoretical Physics JINR 141980 Dubna Russia Matrosov Institute for System Dynamics and Control Theory SB RAS Lermontov street 134 664033 Irkutsk Russia

We propose an extension of the Standard Model (SM) with a UA′(1) gauge-invariant dark sector connected to the SM via a new portal—the Stueckelberg portal, arising in the framework of dark photon A′ mass generation via the 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 nondiagonal 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.

关键词： Particle dark matter Hypothetical gauge bosons Hypothetical particles Hypothetical scalars

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

arXiv

引用

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

arXiv

引用

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

引用

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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Parity violation and modification of fermion spin projectors

引用

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

作者： A E Kaloshin V P Lomov Irkutsk State University K. Marx str. 1 664003 Irkutsk Russia Joint Institute for Nuclear Research 141980 Dubna Russia Inst.for System Dynamics and Control Theory of SB RAS Lermontov str. 134 664033 Irkutsk Russia

Account of interactions in frameworks of Standard Model leads to appearence of γ5 terms in a dressed fermion propagator. In this case the standard spin projectors do not commute with propagator and should be modified. Starting point of our discussion is the eigenvalue problem for inverse propagator S(p). Having the solutions of this problem, one can understand the necessary modification of spin projectors. The same generalized spin projector appears at propagation of neutrino in a moving matter, but in contrast to vacuum case, corresponding polarization vector is not arbitrary. This spin projector commute with neutrino propagator and all dispersion laws for neutrino in media are classified according to spin projection onto this fixed axis.

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Dark SU(2) Stueckelberg portal

arXiv

引用

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

引用

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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Current status of the muon g-2

引用

Journal of Physics: Conference Series 2016年第1期678卷

作者： A. E. Dorokhov A. E. Radzhabov A. S. Zhevlakov Bogoliubov Laboratory of Theoretical Physics JINR 141980 Dubna Russia Department of Physics Tomsk State University Lenin ave. 36 634050 Tomsk Russia N.N. Bogoliubov Institute of Theoretical Problems of Microworld M.V. Lomonosov Moscow State University Moscow 119991 Russia Institute for System Dynamics and Control Theory SB RAS 664033 Irkutsk Russia

The current status of the muon g-2 problem is briefly discussed. We briefly discuss the latest results on the muon g-2 measured in experiment and obtained theoretically within the standard model. Special attention is for the hadronic corrections and in particular the corrections due to the light by light scattering mechanism. For latter we present the results found in the leading in 1/Nc approximation with the nonlocal chiral quark model.

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Past, present and future of the muon g-2

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International Journal of Modern Physics: Conference Series 2015年第39期ijmpcs卷

作者： A. E. Dorokhov A. E. Radzhabov A. S. Zhevlakov Bogoliubov Laboratory of Theoretical Physics JINR 141980 Dubna Russia N. N. Bogoliubov Institute of Theoretical Problems of Microworld M. V. Lomonosov Moscow State University Moscow 119991 Russia Department of Physics Tomsk State University Lenin Ave. 36 634050 Tomsk Russia Institute for System Dynamics and Control Theory SB RAS 664033 Irkutsk Russia

The electron and muon anomalous magnetic moments (AMM) are measured in experiments and studied in the Standard Model (SM) with the highest precision accessible in particle physics. The comparison of the measured quantity with the SM prediction for the electron AMM provides the best determination of the fine structure constant. The muon AMM is more sensitive to the appearance of New Physics effects and, at present, there appears to be a three- to four-standard deviation between the SM and experiment. The lepton AMMs are pure relativistic quantum correction effects and therefore test the foundations of relativistic quantum field theory in general, and of quantum electrodynamics (QED) and SM in particular, with highest sensitivity. Special attention is paid to the studies of the hadronic contributions to the muon AMM which constitute the main source of theoretical uncertainties of the SM.

关键词： Lepton magnetic moment test of standard model strong interactions

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