CERN Accelerating science

CERN Document Server 70 records found  1 - 10próximoend  jump to record: Search took 0.77 seconds. 
1.
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.
Fulltext
2.
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;
3.
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;
4.
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;
5.
Combination of measurements of the top quark mass from data collected by the ATLAS and CMS experiments at $\sqrt{s}=7$ and 8 TeV / ATLAS Collaboration
A combination of fifteen top quark mass measurements performed by the ATLAS and CMS experiments at the LHC is presented. The data sets used correspond to an integrated luminosity of up to 5 and 20$^{-1}$ of proton-proton collisions at center-of-mass energies of 7 and 8 TeV, respectively. [...]
arXiv:2402.08713; CMS-TOP-22-001; ATLAS-TOPQ-2019-13; CERN-EP-2024-020.- 2024-06-27 - 37 p. - Published in : Phys. Rev. Lett. 132 (2024) 261902 Fulltext: 2402.08713 - PDF; 6937cc72640d896305c353aa4c9dc646 - PDF; Fulltext from Publisher: PDF; External links: Physics Synopsis; Fermilab Library Server
6.
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;
7.
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;
8.
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;
9.
Search for Light Dark Matter with NA64 at CERN / NA64 Collaboration
Thermal dark matter models with particle $\chi$ masses below the electroweak scale can provide an explanation for the observed relic dark matter density. This would imply the existence of a new feeble interaction between the dark and ordinary matter. [...]
arXiv:2307.02404; CERN-EP-2023-130.- 2023-10-16 - 7 p. - Published in : Phys. Rev. Lett. 131 (2023) 161801 Fulltext: 2307.02404 - PDF; Publication - PDF;
10.
Measurement of the intrinsic hadronic contamination in the NA64<math altimg="si2.svg" display="inline" id="d1e670"><mrow><mo>−</mo><mi>e</mi></mrow></math> high-purity <math altimg="si3.svg" display="inline" id="d1e678"><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><mo>/</mo><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math> beam at CERN / Andreev, Yu.M. (Unlisted) ; Banerjee, D. (CERN) ; Oberhauser, B. Banto (Zurich, ETH) ; Bernhard, J. (CERN) ; Bisio, P. (INFN, Genoa ; Genoa U.) ; Bondí, M. (INFN, Catania) ; Celentano, A. (INFN, Genoa) ; Charitonidis, N. (CERN) ; Chumakov, A.G. (Unlisted) ; Cooke, D. (University Coll. London) et al.
In this study, we present the measurement of the intrinsic hadronic contamination at the CERN SPS H4 beamline configured to transport electrons and positrons at 100 GeV/c momentum. The analysis was performed using data collected by the NA64-$e$ experiment in 2022. [...]
arXiv:2305.19411; CERN-EP-2023-108.- Geneva : CERN, 2023-10-12 - 8 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1057 (2023) 168776 Draft (restricted): PDF; Fulltext: CERN-EP-2023-108 - PDF; 2305.19411 - PDF; Publication - PDF;

CERN Document Server : 70 records found   1 - 10próximoend  jump to record:
Veja também: nomes de autores similares
25 Kramarenko, V
2 Kramarenko, V N
1 Kramarenko, V.
6 Kramarenko, V. A.
1 Kramarenko, V.A
50 Kramarenko, V.A.
4 Kramarenko, Victor
1403 Kramarenko, Viktor
Interested in being notified about new results for this query?
Set up a personal email alert or subscribe to the RSS feed.
Haven't found what you were looking for? Try your search on other servers:
Kramarenko, V A em Amazon
Kramarenko, V A em CERN EDMS
Kramarenko, V A em CERN Intranet
Kramarenko, V A em CiteSeer
Kramarenko, V A em Google Books
Kramarenko, V A em Google Scholar
Kramarenko, V A em Google Web
Kramarenko, V A em IEC
Kramarenko, V A em IHS
Kramarenko, V A em INSPIRE
Kramarenko, V A em ISO
Kramarenko, V A em KISS Books/Journals
Kramarenko, V A em KISS Preprints
Kramarenko, V A em NEBIS
Kramarenko, V A em SLAC Library Catalog
Kramarenko, V A em Scirus