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1.
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CPT and Lorentz symmetry tests with hydrogen using a novel in-beam hyperfine spectroscopy method applicable to antihydrogen experiments
/ Nowak, Lilian (CERN ; Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Malbrunot, Chloe (CERN) ; Simon, Martin C. (Stefan Meyer Inst. Subatomare Phys.) ; Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Cuendis, Sergio Arguedas (Stefan Meyer Inst. Subatomare Phys.) ; Lahs, Sebastian (Stefan Meyer Inst. Subatomare Phys.) ; Lanz, Andreas (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Nanda, Amit (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Wiesinger, Markus (Stefan Meyer Inst. Subatomare Phys.) ; Wolz, Tim (CERN) et al.
We present a Rabi-type measurement of two ground-state hydrogen hyperfine transitions performed in two opposite external magnetic field directions. This puts first constraints at the level of 2.3 10^-21 GeV on a set of coefficients of the Standard Model Extension, which were not measured by previous experiments. [...]
arXiv:2403.17763.-
2024-09-10 - 7 p.
- Published in : Phys. Lett. B 858 (2024) 139012
Fulltext: 2403.17763 - PDF; Publication - PDF;
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2.
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CPT and Lorentz symmetry tests with hydrogen using a novel in-beam hyperfine spectroscopy method applicable to antihydrogen experiments
/ Nowak, Lilian ; Malbrunot, Chloé ; Simon, Martin C. ; Amsler, Claude ; Arguedas Cuendis, Sergio ; Lahs, Sebastian ; Lanz, Andreas ; Nanda, Amit ; Wiesinger, Markus ; Wolz, Tim et al.
/Asacusa AD-3
We present a Rabi-type measurement of two ground-state hydrogen hyperfine transitions performed in two opposite external magnetic field directions. This puts first constraints at the level of 2.3 × 10^{−21} GeV on a set of coefficients of the Standard Model Extension, which were not measured by previous experiments. [...]
CERN-EP-2024-089.-
Geneva : CERN, 2024 - 9.
Draft (restricted): PDF; Fulltext: PDF;
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3.
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A Proposal for a Low-Frequency Axion Search in the 1–2 μ$\umu$ eV Range and Below with the BabyIAXO Magnet
/ Ahyoune, Saiyd (ICC, Barcelona U.) ; Melcón, Alejandro Álvarez (Cartagena Politecnica U.) ; Cuendis, Sergio Arguedas (ICC, Barcelona U.) ; Calatroni, Sergio (CERN) ; Cogollos, Cristian (Munich, Max Planck Inst.) ; Devlin, Jack (Imperial Coll., London) ; Díaz-Morcillo, Alejandro (Cartagena Politecnica U.) ; Díez-Ibáñez, David (U. Zaragoza (main)) ; Döbrich, Babette (Munich, Max Planck Inst.) ; Galindo, Javier (U. Zaragoza (main)) et al.
In the near future BabyIAXO will be the most powerful axion helioscope, relying on a custom-made magnet of two bores of 70 cm diameter and 10 m long, with a total available magnetic volume of more than 7 m$^3$. In this document, we propose and describe the implementation of low-frequency axion haloscope setups suitable for operation inside the BabyIAXO magnet. [...]
arXiv:2306.17243.-
2023-12-01
- Published in : Ann. Phys. (Leipzig) 535 (2023) 2300326
Fulltext: document - PDF; 2306.17243 - PDF;
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4.
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A Rydberg hydrogen beam for studies of stimulated deexcitation
/ Wolz, Tim (CERN) ; Allemand, Maxime (Ecole Normale Supérieure, Paris) ; Comparat, Daniel (LAC, Orsay) ; Cras, Jules (LAC, Orsay) ; Killian, Carina (Stefan Meyer Inst. Subatomare Phys.) ; Malbrunot, Chloé (CERN) ; Gustafsson, Fredrik Parnefjord (Stefan Meyer Inst. Subatomare Phys.) ; Simon, Martin (Stefan Meyer Inst. Subatomare Phys.) ; Siour, Christophe (LAC, Orsay) ; Widmann, Eberhard (Stefan Meyer Inst. Subatomare Phys.)
/AEgIS Collaboration ; ASACUSA-CUSP Collaboration
We present a Rydberg hydrogen beamline developed to commission techniques of stimulated deexcitation for application in antihydrogen experiments at CERN's Antiproton Decelerator. The stimulation of spontaneous decay is a key technology to enhance the number of ground-state anti-atoms available in a beam toward precision spectroscopy and gravity measurements..
arXiv:2204.09537.-
2022 - 5 p.
- Published in : EPJ Web Conf. 262 (2022) 01002
Fulltext: document - PDF; 2204.09537 - PDF;
In : 7th International Conference on Exotic Atoms and Related Topics, Online, 13 - 17 Sep 2021, pp.01002
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5.
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6.
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Imaging a positronium cloud in a 1 Tesla
/ Camper, Antoine (CERN) ; Aghion, Stefano (Milan Polytechnic ; INFN, Milan) ; Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Antonello, Massimiliano (INFN, Milan ; Insubria U., Como) ; Belov, Alexander (Moscow, INR) ; Bonomi, Germano (INFM, Brescia ; INFN, Pavia) ; Brusa, Roberto (Trento U. ; TIFPA-INFN, Trento) ; Caccia, Massimo (INFN, Milan ; Insubria U., Como) ; Caravita, Ruggero (CERN) ; Castelli, Fabrizio (INFN, Milan ; Milan U.) et al.
We report on recent developments in positronium work in the frame of antihydrogen production through charge exchange in the AEgIS collaboration [1]. In particular, we present a new technique based on spatially imaging a cloud of positronium by collecting the positrons emitted by photoionization. [...]
2019 - 7 p.
- Published in : EPJ Web Conf. 198 (2019) 00004
Fulltext: PDF;
In : Quantum Technology International Conference 2018, Paris, France, 5 - 7 Sep 2018, pp.00004
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7.
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Design of New Resonant Haloscopes in the Search for the Dark Matter Axion: A Review of the First Steps in the RADES Collaboration
/ Díaz-Morcillo, Alejandro (Cartagena Politecnica U.) ; Barceló, José María García (Cartagena Politecnica U.) ; Guerrero, Antonio José Lozano (Cartagena Politecnica U.) ; Navarro, Pablo (Cartagena Politecnica U.) ; Gimeno, Benito (Valencia U., IFIC) ; Cuendis, Sergio Arguedas (CERN) ; Melcón, Alejandro Álvarez (Cartagena Politecnica U.) ; Cogollos, Cristian (Barcelona, IEEC) ; Calatroni, Sergio (CERN) ; Döbrich, Babette (CERN) et al.
Within the increasing interest in the dark matter axion detection through haloscopes, in which different international groups are currently involved, the RADES group was established in 2016 with the goal of developing very sensitive detection systems to be operated in dipole magnets. This review deals with the work developed by this collaboration during its first five years, from the first designs, based on the multi-cavity concept, aiming to increase the haloscope volume and, so, to improve its sensitivity, their evolution, the data acquisition design, and, finally, the first experimental run. [...]
arXiv:2111.14510.-
2021-12-23 - 24 p.
- Published in : Universe 8 (2021) 5
Fulltext: 2111.14510 - PDF; document - PDF;
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8.
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9.
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Pulsed production of antihydrogen
/ Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Antonello, Massimiliano (Insubria U., Como ; INFN, Milan) ; Belov, Alexander (Moscow, INR) ; Bonomi, Germano (U. Brescia ; INFN, Pavia) ; Brusa, Roberto Sennen (Trento U. ; TIFPA-INFN, Trento) ; Caccia, Massimo (Insubria U., Como ; INFN, Milan) ; Camper, Antoine (CERN) ; Caravita, Ruggero (TIFPA-INFN, Trento ; CERN) ; Castelli, Fabrizio (INFN, Milan ; Milan U.) ; Cheinet, Patrick (LAC, Orsay) et al.
Antihydrogen atoms with K or sub-K temperature are a powerful tool to precisely probe the validity of fundamental physics laws and the design of highly sensitive experiments needs antihydrogen with controllable and well defined conditions. We present here experimental results on the production of antihydrogen in a pulsed mode in which the time when 90% of the atoms are produced is known with an uncertainty of ~250 ns. [...]
2021 - 11 p.
- Published in : Commun. Phys. 4 (2021) 19
Fulltext: PDF;
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10.
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Induced THz transitions in Rydberg caesium atoms for application in antihydrogen experiments
/ Vieille-Grosjean, Mélissa (LAC, Orsay) ; Dimova, Emiliya (Sofiya, Inst. Nucl. Res.) ; Mazzotta, Zeudi (LAC, Orsay) ; Comparat, Daniel (LAC, Orsay) ; Wolz, Tim (CERN) ; Malbrunot, Chloé (CERN)
Antihydrogen atoms are produced at CERN in highly excited Rydberg states. However, precision measurements require anti-atoms in ground state. [...]
arXiv:2101.01047.-
2021-01-21 - 7 p.
- Published in : Eur. Phys. J. D 75 (2021) 27
Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;
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