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Measured Properties of an Antihydrogen Beam
/ Hunter, E. D. ; Bumbar, M. ; Amsler, C. ; Bayo, M. N. ; Breuker, H. ; Cerwenka, M. ; Costantini, G. ; Ferragut, R. ; Giammarchi, M. ; Gligorova, A. et al.
/Asacusa AD-3
We report a factor of 100 increase in the antihydrogen beam intensity downstream of ASACUSA’s Cusp trap: 320 atoms detected per 15-minute run. The beam contains many Rydberg atoms, which we selectively ionize to determine their velocity and binding energy. [...]
CERN-EP-2025-195.-
Geneva : CERN, 2025 - 19.
Draft (restricted): PDF; Fulltext: PDF; External link: Additional Information
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The scintillating bar detector of the ASACUSA experiment
/ Mascagna, V (U. Brescia ; INFN, Pavia) ; Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Bayo, Matias (Milan Polytechnic ; INFN, Milan) ; Breuker, Horst (Wako, RIKEN) ; Bumbar, Marcus (Vienna U. ; CERN ; Imperial Coll., London) ; Cerwenka, Matti (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Costantini, Giovanni (U. Brescia ; INFN, Pavia) ; Ferragut, Rafael (Milan Polytechnic ; INFN, Milan) ; Giammarchi, Marco (INFN, Milan) ; Gligorova, Angela (Wako, RIKEN) et al.
Detecting charged pions emitted from antiproton annihilation on nuclei is a well-established technique utilized to determine annihilation vertex positions, crucial for several experiments in the antimatter field. For the past decade, a detector composed of plastic scintillating bars has been integral to the ASACUSA experiment, employed in both antihydrogen formation experiments and annihilation cross-section measurements. [...]
2025 - 8 p.
- Published in : PoS EXA-LEAP2024 (2025) 077
Fulltext: PDF;
In : International Conference on Exotic Atoms and Related Topics and Conference on Low Energy Antiprotons (EXA/LEAP 2024), Vienna, Austria, 26 - 30 Aug 2024, pp.077
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CERN AD/ELENA Antimatter Program
/ Caravita, R. (TIFPA-INFN, Trento) ; Cridland Mathad, A. (CERN) ; Hangst, J.S. (Aarhus U.) ; Hori, M. (Imperial Coll., London) ; Latacz, B.M. (CERN) ; Obertelli, A. (Darmstadt, Tech. U.) ; Perez, P. (IRFU, Saclay) ; Ulmer, S. (Heinrich Heine U., Dusseldorf ; RIKEN (main)) ; Widmann, E. (Stefan Meyer Inst. Subatomare Phys.)
The CERN AD/ELENA Antimatter program studies the fundamental charge, parity, time (CPT) reversal invariance through high-precision studies of antiprotons, antihydrogen, and antiprotonic atoms. [...]
arXiv:2503.22471.
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Fulltext
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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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Injection and capture of antiprotons in a Penning–Malmberg trap using a drift tube accelerator and degrader foil
/ Amsler, C. (Stefan Meyer Inst. Subatomare Phys.) ; Breuker, H. (Wako, RIKEN) ; Bumbar, M. (CERN) ; Chesnevskaya, S. (Stefan Meyer Inst. Subatomare Phys.) ; Costantini, G. (Brescia U. ; INFN, Pavia) ; Ferragut, R. (INFN, Milan ; Padua U. ; INFN, Padua) ; Giammarchi, M. (Padua U. ; INFN, Padua) ; Gligorova, A. (Stefan Meyer Inst. Subatomare Phys.) ; Gosta, G. (Brescia U. ; INFN, Pavia) ; Higaki, H. (Hiroshima U.) et al.
The Antiproton Decelerator (AD) at CERN provides antiproton bunches with a kinetic energy of 5.3 MeV. The Extra-Low ENergy Antiproton ring at CERN, commissioned at the AD in 2018, now supplies a bunch of electron-cooled antiprotons at a fixed energy of 100 keV. [...]
arXiv:2403.09268.-
2024-06-12 - 22 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1065 (2024) 169529
Fulltext: PDF;
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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; 2407.06721 - PDF; document - PDF;
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10.
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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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