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Proof of principle for a light dark matter search with low-energy positron beams at NA64 / NA64 Collaboration
Thermal light dark matter (LDM) with particle masses in the 1 MeV - 1 GeV range could successfully explain the observed dark matter abundance as a relic from the primordial Universe. [...]
arXiv:2502.04053. - 34.
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Proof of principle for a light dark matter search with low-energy positron beams at NA64 / Andreev, Yu. M. ; Antonov, A. ; Ayala Torres, M. A. ; Banerjee, D. ; Banto Oberhauser, B. ; Bautin, V. ; Bernhard, J. ; Bisio, P. ; Bondì, M. ; Celentano, A. et al.
Thermal light dark matter (LDM) with particle masses in the 1 MeV - 1 GeV range could successfully explain the observed dark matter abundance as a relic from the primordial Universe. In this picture, a new feeble interaction acts as a “portal” between the Standard Model and LDM particles, allowing for the exploration of this paradigm at accelerator experiments. [...]
CERN-EP-2025-016.- Geneva : CERN, 2025 Draft (restricted): PDF; Fulltext: PDF;

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AD-7/GBAR status report for the 2025 CERN SPSC / GBAR Collaboration
We report on the activities performed during 2024 and the plans for 2025 for the GBAR experiment. [...]
CERN-SPSC-2025-005 ; SPSC-SR-360. - 2025 - mult..
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Dark-Sector Search via Pion-Produced η and η′ Mesons Decaying Invisibly in the NA64h Detector / NA64 Collaboration
We present the first results from a proof-of-concept search for dark sectors via invisible decays of pseudoscalar η and η′ mesons in the NA64h experiment at the CERN SPS. Our novel technique uses the charge-exchange reaction of 50 GeV π- on nuclei of an active target as the source of neutral mesons. [...]
2024 - 6 p. - Published in : Phys. Rev. Lett. 133 (2024) 121803 Fulltext: PDF;

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Advanced accelerator concepts for dark sector searches and fast muon acceleration / Zimmermann, Frank (CERN) ; Pukhov, Alexander (Heinrich Heine U., Dusseldorf) ; Badiali, Chiara (Lisbon U.) ; Schulte, Daniel (CERN) ; Franchetti, Giuliano (Darmstadt, GSI ; Frankfurt U.) ; Krasny, Mieczyslaw (LPNHE, Paris) ; Crivelli, Paolo (Zurich, ETH) ; Ischebeck, Rasmus (PSI, Villigen) ; Dadashi Motlagh, Raziyeh (PSI, Villigen ; Ecole Polytechnique, Lausanne) ; Moebius, Silke (Bern U.) et al.
Dielectric laser acceleration (DLA) is a promising approach to accelerate single electrons at a high repetition rate to GeV energies, for indirect dark matter searches. Relevant concepts include the integration of the dielectric structure inside the laser oscillator. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) MOPR17 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPR17

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Shedding light on dark sectors with high-energy muons at the NA64 experiment at the CERN SPS / NA64 Collaboration
A search for Dark Sectors is performed using the unique M2 beam line at the CERN Super Proton Synchrotron. New particles ($X$) could be produced in the bremsstrahlung-like reaction of high energy 160 GeV muons impinging on an active target, $\mu N\rightarrow\mu NX$, followed by their decays, $X\rightarrow\text{invisible}$. [...]
arXiv:2409.10128; CERN-EP-2024-236.- Geneva : CERN, 2024-12-01 - 23 p. - Published in : Phys. Rev. D 110 (2024) 112015 Draft (restricted): PDF; Fulltext: CERN-EP-2024-236 - PDF; 2409.10128 - PDF; Publication - PDF;

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NA64 Status Report 2024 / Crivelli, P ; Molina Bueno, L ; Banto Oberhauser, B
In this report, we focus mostly on the results obtained after unblinding the 2022 data using 160 GeV muons at the M2 beamline. [...]
CERN-SPSC-2024-024 ; SPSC-SR-352. - 2024.
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First constraints on the L$_{μ}$− L$_{τ}$ explanation of the muon g-2 anomaly from NA64-e at CERN / NA64 Collaboration
The inclusion of an additional $U(1)$ gauge $L_\mu-L_\tau$ symmetry would release the tension between the measured and the predicted value of the anomalous muon magnetic moment: this paradigm assumes the existence of a new, light $Z^\prime$ vector boson, with dominant coupling to $\mu$ and $\tau$ leptons and interacting with electrons via a loop mechanism. The $L_\mu-L_\tau$ model can also explain the Dark Matter relic abundance, by assuming that the $Z^\prime$ boson acts as a ``portal'' to a new Dark Sector of particles in Nature, not charged under known interactions. [...]
arXiv:2404.06982; CERN-EP-2024-103.- Geneva : CERN, 2024-07-23 - 15 p. - Published in : JHEP 2407 (2024) 212 Draft (restricted): PDF; Fulltext: CERN-EP-2024-103 - PDF; NA64-PAPER-24-02 - PDF; 2404.06982 - PDF; document - PDF;

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First Results in the Search for Dark Sectors at NA64 with the CERN SPS High Energy Muon Beam / NA64 Collaboration
We report on a search for a new $Z'$ ($L_\mu-L_\tau$) vector boson performed at the NA64 experiment employing a high energy muon beam and a missing energy-momentum technique. Muons from the M2 beamline at the CERN Super Proton Synchrotron with a momentum of 160 GeV/c are directed to an active target. [...]
arXiv:2401.01708; CERN-EP-2023-306.- Geneva : CERN, 2024-05-21 - 5 p. - Published in : Phys. Rev. Lett. 132 (2024) 211803 Draft (restricted): PDF; Fulltext: CERN-EP-2023-306 - PDF; 2401.01708 - PDF; Publication - PDF;

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10.

Probing light dark matter with positron beams at NA64 / NA64 Collaboration
We present the results of a missing-energy search for Light Dark Matter which has a new interaction with ordinary matter transmitted by a vector boson, called dark photon ($A^\prime$). For the first time, this search is performed with a positron beam by using the significantly enhanced production of $A^\prime$ in the resonant annihilation of positrons with atomic electrons of the target nuclei, followed by the invisible decay of $A^\prime$ into dark matter. [...]
arXiv:2308.15612; CERN-EP-2023-192.- Geneva : CERN, 2024-02-01 - 6 p. - Published in : Phys. Rev. D 109 (2024) L031103 Draft (restricted): PDF; Fulltext: CERN-EP-2023-192 - PDF; 2308.15612 - PDF; Publication - PDF;

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Voir aussi: noms d'auteurs similaires
39	Crivelli, P
14	Crivelli, Paolo

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