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CERN Document Server 7 Datensätze gefunden  Die Suche hat 1.32 Sekunden gedauert. 
1.
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.
Antiproton annihilation at rest in thin solid targets and comparison with Monte Carlo simulations / Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Breuker, Horst (Wako, RIKEN) ; Bumbar, Marcus (CERN ; Vienna U.) ; Cerwenka, Matti (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Costantini, Giovanni (Brescia U. ; INFN, Brescia ; INFN, Pavia) ; Ferragut, Rafael (Milan Polytechnic ; INFN, Milan ; Milan U.) ; Fleck, Markus (Stefan Meyer Inst. Subatomare Phys.) ; Giammarchi, Marco (INFN, Milan ; Milan U.) ; Gligorova, Angela (Stefan Meyer Inst. Subatomare Phys.) ; Gosta, Giulia (Brescia U. ; INFN, Brescia ; INFN, Pavia) et al. /Asacusa AD-3
The mechanism of antiproton-nucleus annihilation at rest is not fully understood, despite substantial previous experimental and theoretical work. In this study we used slow extracted, sub-keV antiprotons from the ASACUSA apparatus at CERN to measure the charged particle multiplicities and their energy deposits from antiproton annihilations at rest on three different nuclei: carbon, molybdenum and gold. [...]
arXiv:2407.06721.- Geneva : CERN, 2024-11-17 - 18 p. - Published in : Eur. Phys. J. A 60 (2024) 225 Draft (restricted): PDF; Fulltext: CERN-EP-2024-182 - PDF; document - PDF; 2407.06721 - PDF;
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3.
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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4.
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.
Hyperfine structure: from hydrogen to antihydrogen / Malbrunot, Chloe (CERN) ; Simon, Martin ; Widmann, Eberhard
Earlier this year, the ASACUSA experiment at CERN’s Antiproton Decelerator published the most precise in-beam measurement of the hydrogen ground-state hyperfine splitting, and is now preparing for new measurements..

Geneva : CERN, 2017
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6.
Annihilation detector for an in-beam spectroscopy apparatus to measure the ground state hyperfine splitting of antihydrogen / Sauerzopf, Clemens (Stefan Meyer Inst. Subatomare Phys.) ; Capon, Aaron A (Stefan Meyer Inst. Subatomare Phys.) ; Diermaier, Martin (Stefan Meyer Inst. Subatomare Phys.) ; Fleck, Markus (Stefan Meyer Inst. Subatomare Phys.) ; Kolbinger, Bernadette (Stefan Meyer Inst. Subatomare Phys.) ; Malbrunot, Chloé (Stefan Meyer Inst. Subatomare Phys. ; CERN) ; Massiczek, Oswald (Stefan Meyer Inst. Subatomare Phys.) ; Simon, Martin C (Stefan Meyer Inst. Subatomare Phys.) ; Vamosi, Stefan (Stefan Meyer Inst. Subatomare Phys.) ; Zmeskal, Johann (Stefan Meyer Inst. Subatomare Phys.) et al.
The matter-antimatter asymmetry observed in the universe today still lacks a quantitative explanation. One possible mechanism that could contribute to the observed imbalance is a violation of the combined Charge-, Parity- and Time symmetries (CPT). [...]
2017 - 4 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 845 (2017) 579-582 Fulltext: PDF;
In : 14th Vienna Conference on Instrumentation, Vienna, Austria, 15 - 19 Feb 2016, pp.579-582
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7.
An atomic hydrogen beam to test ASACUSA's apparatus for antihydrogen spectroscopy / Diermaier, Martin (Stefan Meyer Inst. Subatomare Phys.) ; Caradonna, Peter (Stefan Meyer Inst. Subatomare Phys.) ; Kolbinger, Bernadette (Stefan Meyer Inst. Subatomare Phys.) ; Malbrunot, Chloé (CERN) ; Massiczek, Oswald (Stefan Meyer Inst. Subatomare Phys.) ; Sauerzopf, Clemens (Stefan Meyer Inst. Subatomare Phys.) ; Simon, Martin C. (Stefan Meyer Inst. Subatomare Phys.) ; Wolf, Michael (Stefan Meyer Inst. Subatomare Phys.) ; Zmeskal, Johann (Stefan Meyer Inst. Subatomare Phys.) ; Widmann, Eberhard (Stefan Meyer Inst. Subatomare Phys.)
The ASACUSA collaboration aims to measure the ground state hyperfine splitting (GS-HFS) of antihydrogen, the antimatter pendant to atomic hydrogen. Comparisons of the corresponding transitions in those two systems will provide sensitive tests of the CPT symmetry, the combination of the three discrete symmetries charge conjugation, parity, and time reversal. [...]
arXiv:1501.02635.- 2015 - 8 p. - Published in : Hyperfine Interact. 233 (2015) 35-40 Fulltext: PDF; External link: Preprint
In : 5th International Conference on Exotic Atoms and Related Topics, Vienna, Austria, 15 - 19 Sep 2014, pp.35-40
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