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CERN Document Server Pronađeno je 20 zapisa  1 - 10slijedeći  idi na zapis: Pretraživanje je potrajalo 0.70 sekundi 
1.
Searching for Light Dark Matter and Dark Sectors with the NA64 experiment at the CERN SPS / NA64 Collaboration
Since its approval in 2016, NA64 has pioneered light dark matter (LDM) searches with electron, positron, muon, and hadron beams. [...]
arXiv:2505.14291. - 15.
Fulltext
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2.
High efficiency veto hadron calorimeter in the NA64 experiment at CERN / NA64 Collaboration
NA64 is a fixed-target experiment at the CERN SPS designed to search for Light particle Dark Matter (LDM) candidates with masses in the sub-GeV range. During the 2016-2022 runs, the experiment obtained the world-leading constraints, leaving however part of the well-motivated region of parameter space suggested by benchmark LDM models still unexplored. [...]
arXiv:2503.11275; CERN-EP-2025-04.- 2025-07-18 - 13 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1081 (2026) 170830 Fulltext: 2503.11275 - PDF; document - PDF;
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3.
High efficiency veto hadron calorimeter in the NA64 experiment at CERN / 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. /NA64
The NA64 is a fixed-target experiment at the CERN SPS designed to search for Light particle Dark Matter (LDM) candidates with masses in the sub-GeV range. During the 2016-2022 runs, the experiment obtained the world-leading constraints, leaving however part of the well-motivated region of parameter space suggested by benchmark LDM models still unexplored. [...]
CERN-EP-2025-049.- Geneva : CERN, 2025 Draft (restricted): PDF; Fulltext: PDF;
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4.
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. 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. [...]
arXiv:2502.04053.- 2025-06-26 - 34 p. - Published in : JHEP 2506 (2025) 256 Fulltext: 2502.04053 - PDF; document - PDF;
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5.
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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6.
The NA64-e experiment at CERN / Bisio, Pietro (Genoa U. ; INFN, Genoa) /NA64 Collaboration
One of the most compelling arguments motivating the search for physics beyond the Standard Model (SM) is the need to explain the nature of Dark Matter (DM). Despite an extensive experimental program that combined direct, indirect, and detection at colliders, to date, no conclusive results about DM particle nature have been determined. [...]
2024 - 7 p. - Published in : PoS DISCRETE2022 (2024) 072 Fulltext: PDF;
In : 8th Symposium on Prospects in the Physics of Discrete Symmetries, Baden-baden, Germany, 7 - 11 Nov 2022, pp.072
Detaljnije
7.
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;
Detaljnije
8.
Dark-Sector Search via Pion-Produced η and η0 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. [...]
arXiv:2406.01990; CERN-EP-2024-153.- Geneva : CERN, 2024-09-20 - 6 p. - Published in : Phys. Rev. Lett. 133 (2024) 121803 Draft (restricted): PDF; Fulltext: CERN-EP-DRAFT-NA64-2024-002_v2 - PDF; CERN-EP-2024-153 - PDF; preprint: PDF; publication: PDF;
Detaljnije
9.
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;
Detaljnije
10.
Measurement for the $e^+$ beam purity at the CERN-SPS H8 beamline / Bisio, Pietro (INFN e Universita Genova (IT)) ; Celentano, Andrea (INFN e Universita Genova (IT)) ; Marsicano, Luca (INFN e Universita Genova (IT)) ; Bondi, Mariangela (INFN e Laboratori Nazionali di Frascati (IT)) ; Marini, Anna (INFN e Universita Genova (IT))
This Note describes the $e^+$-beam purity measurement for the H8 beamline of the Super Proton Synchrotron (SPS) at CERN. This study was performed in the context of the POKERINO prototype characterization, conducted during a week of measurements in the summer of 2023 at the H8 beamline. [...]
CERN-OPEN-2024-002; POKER-NOTE-23-12.- Geneva : CERN, 2024 - 4 p. Preprint: PDF; External link: Approve this document (restricted)
Detaljnije

CERN Document Server : Pronađeno je 20 zapisa   1 - 10slijedeći  idi na zapis:
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