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CERN Document Server 2,036 のレコードが見つかりました。  1 - 10次最後  レコードへジャンプ： 検索にかかった時間： 0.64 秒 
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Shedding light on Dark Sectors with high-energy muons at the NA64 experiment at the CERN SPS / Andreev, Yu.M. ; Banerjee, D. ; Oberhauser, B. Banto ; Bernhard, J. ; Bisio, P. ; Charitonidis, N. ; Crivelli, P. ; Depero, E. ; Dermenev, A.V. ; Donskov, S.V. et al. /NA64
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, $X\rightarrow\text{invisible}$. [...]
CERN-EP-2024-236; arXiv:2409.10128.- Geneva : CERN, 2024 - 24 p. Draft (restricted): PDF; Fulltext: CERN-EP-2024-236 - PDF; 2409.10128 - PDF;
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NA64 status report 2023 / Molina Bueno, Laura ; Crivelli, Paolo ; NA64 collaboration, The
In this report, we summarise the 2016-2022 combined analysis on A$'\rightarrow$invisible searches with 9.37$\times10^{11}$ electrons on target. [...]
CERN-SPSC-2023-023 ; SPSC-SR-332. - 2023.
Fulltext
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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; Publication - PDF; 2401.01708 - PDF;
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A comparison between Salin's and Adler's models for $ nu N\rightarrow\mu N ^{*}$ reactions / Bijtebier, J (CERN)
1970.
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Spin effects in exclusive $\rho^{0}$ meson production at COMPASS experiment / Grajek, O A (Warsaw, Inst. Nucl. Studies) /on behalf of the COMPASS Collaboration
Preliminary results from exclusive production of $\rho^{0}$ mesons at the COMPASS experiment at CERN, using a 160 GeV polarized muon beam and a large polarized nuclear target, are presented. The studied reaction is exclusive $incoherent \rho^{0}$ production, $\mu N\rightarrow\mu N\rho^{0}$, with $N$ being the nucleon in any of the nuclei of the target. [...]
2005 - 14 p. - Published in : Acta Phys. Pol. B 36 (2005) 2363 Fulltext: PDF;
In : Cracow Epiphany Conference on Hadron Spectroscopy, Krakow, Poland, 6 - 8 Jan 2005, pp.2363
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Status and Plans for the NA64 Experiment / Bernhard, J (CERN) /NA64 Collaboration ; Physics Beyond Collider Conventional Beams working group Collaboration
The NA64 experiment at the CERN North Area searches for dark matter production via both visible and invisible decays of sub-GeV vector mediators, such as the dark photon $A$´. In a first data taking period from 2016-2018, $A$' generation from the reaction e Z $\rightarrow$ e Z $A$' and subsequent decays $A$´ $\rightarrow x\overline{x}$ and $A$´ $\rightarrow$ e$^+$e$^-$ was studied with the help of an active dump set-up using 100 GeV/$c$ and 150 GeV/$c$ electrons. [...]
IOP, 2020 - 4 p. - Published in : J. Phys.: Conf. Ser. 1468 (2020) 012023 Published fulltext: PDF;
In : 16th International Conference on Topics in Astroparticle and Underground Physics, Toyama, Japan, 9 - 13 Sep 2019, pp.012023
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NA64—Search for Dark Sector Particles / Banerjee, Dipanwita (CERN)
NA64 is a fixed target dark matter experiment at the CERN SPS searching for dark photons ($A'$) in the sub-GeV mass range at the secondary beamlines of the CERN North Area. It uses the electron beam from the H4 beamline and the muon beam from the M2 beamline with an aim to detect the dark photons from the interaction of the beam in an active target, an electromagnetic calorimeter (ECAL). [...]
2022 - 11 p. - Published in : 10.1007/978-3-031-05625-3_11
In : Advances in cosmology, pp.183-193
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NA64 Status Report 2017 / Gninenko, Sergei
The experiment NA64 is aimed at a direct search for invisible decays of sub-GeV dark photons (A′). [...]
CERN-SPSC-2017-018 ; SPSC-SR-212. - 2017.
Fulltext
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Search for Dark Sector Physics at the NA64 experiment in the context of the Physics Beyond Colliders Project / Banerjee, Dipanwita (CERN ; Illinois State U.) /NA64 Collaboration ; Physics Beyond Colliders Conventional Beams Working Group
The NA64 electron beam program comprises of a high sensitivity search for visible and invisible decays of the hypothetical dark photon, $A'$, with a goal to either observe the sub-GeV Dark Matter mediator or exclude most of the model parameter space. The visible channel search also includes clarification of the origin of the $^8$Be anomaly observed by the Atomki experiment. [...]
arXiv:1909.04363.- SISSA, 2019-11-05 - 6 p. - Published in : PoS LeptonPhoton2019 (2019) 061 Fulltext: 1909.04363 - PDF; PoS(LeptonPhoton2019)061 - PDF;
In : XXIX International Symposium on Lepton Photon Interactions at High Energies, Toronto, Canada, 5 - 10 Aug 2019, pp.061
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Addendum to the NA64 Proposal: Search for the $A'\to invisible$ and $X\to e^+e^-$ decays in 2021 / Gninenko, Sergei
The experiment NA64 is aimed at a direct search for sub-GeV vector mediator $A'$ of Dark Matter production in invisible $A'$ decay mode [...]
CERN-SPSC-2018-004 ; SPSC-P-348-ADD-2. - 2018.
Fulltext - Original Document (SPSC-P-348)
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