Probing the explanation of the muon (g-2) anomaly and thermal light dark matter with the semi-visible dark photon channel.

Autor: Cazzaniga C; ETH Zürich Institute for Particle Physics and Astrophysics, 8093 Zurich, Switzerland., Odagiu P; ETH Zürich Institute for Particle Physics and Astrophysics, 8093 Zurich, Switzerland.; Institute of Physics, École polytechnique fédérale de Lausanne (EPFL), Lausanne, Switzerland., Depero E; ETH Zürich Institute for Particle Physics and Astrophysics, 8093 Zurich, Switzerland., Molina Bueno L; ETH Zürich Institute for Particle Physics and Astrophysics, 8093 Zurich, Switzerland.; Instituto de Fisica Corpuscular (CSIC/UV), Carrer del Catedrátic José Beltrán Martinez, 2, 46980 Paterna, Valencia Spain., Andreev YM; Institute for Nuclear Research, 117312 Moscow, Russia., Banerjee D; CERN, EN-EA, 1211 Geneva 23, Switzerland.; University of Illinois at Urbana Champaign, Urbana, IL 61801-3080 USA., Bernhard J; CERN, EN-EA, 1211 Geneva 23, Switzerland., Burtsev VE; Joint Institute for Nuclear Research, 141980 Dubna, Russia., Charitonidis N; CERN, EN-EA, 1211 Geneva 23, Switzerland., Chumakov AG; Tomsk State Pedagogical University, 634061 Tomsk, Russia.; Tomsk Polytechnic University, 634050 Tomsk, Russia., Cooke D; UCL Departement of Physics and Astronomy, University College London, Gower St., London, WC1E 6BT UK., Crivelli P; ETH Zürich Institute for Particle Physics and Astrophysics, 8093 Zurich, Switzerland., Dermenev AV; Institute for Nuclear Research, 117312 Moscow, Russia., Donskov SV; State Scientific Center of the Russian Federation Institute for High Energy Physics of National Research Center 'Kurchatov Institute' (IHEP), 142281 Protvino, Russia., Dusaev RR; Tomsk Polytechnic University, 634050 Tomsk, Russia., Enik T; Joint Institute for Nuclear Research, 141980 Dubna, Russia., Feshchenko A; Joint Institute for Nuclear Research, 141980 Dubna, Russia., Frolov VN; Joint Institute for Nuclear Research, 141980 Dubna, Russia., Gardikiotis A; Physics Department, University of Patras, 265 04 Patras, Greece., Gerassimov SG; Physik Department, Technische Universität München, 85748 Garching, Germany.; P.N. Lebedev Physical Institute, 119 991 Moscow, Russia., Girod S; CERN, EN-EA, 1211 Geneva 23, Switzerland., Gninenko SN; Institute for Nuclear Research, 117312 Moscow, Russia., Hösgen M; Helmholtz-Institut für Strahlen-und Kernphysik, Universität Bonn, 53115 Bonn, Germany., Kachanov VA; State Scientific Center of the Russian Federation Institute for High Energy Physics of National Research Center 'Kurchatov Institute' (IHEP), 142281 Protvino, Russia., Karneyeu AE; Institute for Nuclear Research, 117312 Moscow, Russia., Kekelidze G; Joint Institute for Nuclear Research, 141980 Dubna, Russia., Ketzer B; Helmholtz-Institut für Strahlen-und Kernphysik, Universität Bonn, 53115 Bonn, Germany., Kirpichnikov DV; Institute for Nuclear Research, 117312 Moscow, Russia., Kirsanov MM; Institute for Nuclear Research, 117312 Moscow, Russia., Kolosov VN; State Scientific Center of the Russian Federation Institute for High Energy Physics of National Research Center 'Kurchatov Institute' (IHEP), 142281 Protvino, Russia., Konorov IV; Physik Department, Technische Universität München, 85748 Garching, Germany.; P.N. Lebedev Physical Institute, 119 991 Moscow, Russia., Kovalenko SG; Departamento de Ciencias Físicas, Universidad Andres Bello, Sazié 2212, Piso 7, Santiago, Chile.; Millennium Institute for Subatomic Physics at the High-Energy Frontier (SAPHIR), ICN2019_044, ANID, Santiago, Chile., Kramarenko VA; Joint Institute for Nuclear Research, 141980 Dubna, Russia.; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991 Moscow, Russia., Kravchuk LV; Institute for Nuclear Research, 117312 Moscow, Russia., Krasnikov NV; Institute for Nuclear Research, 117312 Moscow, Russia.; Joint Institute for Nuclear Research, 141980 Dubna, Russia., Kuleshov SV; Departamento de Ciencias Físicas, Universidad Andres Bello, Sazié 2212, Piso 7, Santiago, Chile.; Millennium Institute for Subatomic Physics at the High-Energy Frontier (SAPHIR), ICN2019_044, ANID, Santiago, Chile., Lyubovitskij VE; Tomsk State Pedagogical University, 634061 Tomsk, Russia.; Tomsk Polytechnic University, 634050 Tomsk, Russia.; Millennium Institute for Subatomic Physics at the High-Energy Frontier (SAPHIR), ICN2019_044, ANID, Santiago, Chile.; Universidad Técnica Federico Santa María, 2390123 Valparaiso, Chile., Lysan V; Joint Institute for Nuclear Research, 141980 Dubna, Russia., Matveev VA; Joint Institute for Nuclear Research, 141980 Dubna, Russia., Mikhailov YV; State Scientific Center of the Russian Federation Institute for High Energy Physics of National Research Center 'Kurchatov Institute' (IHEP), 142281 Protvino, Russia., Peshekhonov DV; Joint Institute for Nuclear Research, 141980 Dubna, Russia., Polyakov VA; State Scientific Center of the Russian Federation Institute for High Energy Physics of National Research Center 'Kurchatov Institute' (IHEP), 142281 Protvino, Russia., Radics B; ETH Zürich Institute for Particle Physics and Astrophysics, 8093 Zurich, Switzerland., Rojas R; Universidad Técnica Federico Santa María, 2390123 Valparaiso, Chile., Rubbia A; ETH Zürich Institute for Particle Physics and Astrophysics, 8093 Zurich, Switzerland., Samoylenko VD; State Scientific Center of the Russian Federation Institute for High Energy Physics of National Research Center 'Kurchatov Institute' (IHEP), 142281 Protvino, Russia., Shchukin D; P.N. Lebedev Physical Institute, 119 991 Moscow, Russia., Sieber H; ETH Zürich Institute for Particle Physics and Astrophysics, 8093 Zurich, Switzerland., Tikhomirov VO; P.N. Lebedev Physical Institute, 119 991 Moscow, Russia., Tlisova IV; Institute for Nuclear Research, 117312 Moscow, Russia., Tlisov DA; Institute for Nuclear Research, 117312 Moscow, Russia., Toropin AN; Institute for Nuclear Research, 117312 Moscow, Russia., Trifonov AY; Tomsk State Pedagogical University, 634061 Tomsk, Russia.; Tomsk Polytechnic University, 634050 Tomsk, Russia., Vasilishin BI; Tomsk Polytechnic University, 634050 Tomsk, Russia., Arenas GV; Universidad Técnica Federico Santa María, 2390123 Valparaiso, Chile., Volkov PV; Joint Institute for Nuclear Research, 141980 Dubna, Russia.; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991 Moscow, Russia., Volkov VY; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991 Moscow, Russia., Ulloa P; Departamento de Ciencias Físicas, Universidad Andres Bello, Sazié 2212, Piso 7, Santiago, Chile.
Jazyk: angličtina
Zdroj: The European physical journal. C, Particles and fields [Eur Phys J C Part Fields] 2021; Vol. 81 (10), pp. 959. Date of Electronic Publication: 2021 Oct 30.
DOI: 10.1140/epjc/s10052-021-09705-5
Abstrakt: We report the results of a search for a new vector boson ( A ' ) decaying into two dark matter particles χ 1 χ 2 of different mass. The heavier χ 2 particle subsequently decays to χ 1 and an off-shell Dark Photon A ' ∗ → e + e - . For a sufficiently large mass splitting, this model can explain in terms of new physics the recently confirmed discrepancy observed in the muon anomalous magnetic moment at Fermilab. Remarkably, it also predicts the observed yield of thermal dark matter relic abundance. A detailed Monte-Carlo simulation was used to determine the signal yield and detection efficiency for this channel in the NA64 setup. The results were obtained re-analyzing the previous NA64 searches for an invisible decay A ' → χ χ ¯ and axion-like or pseudo-scalar particles a → γ γ . With this method, we exclude a significant portion of the parameter space justifying the muon g-2 anomaly and being compatible with the observed dark matter relic density for A ' masses from 2 m e up to 390 MeV and mixing parameter ε between 3 × 10 - 5 and 2 × 10 - 2 .
(© The Author(s) 2021.)
Databáze: MEDLINE
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