https://doi.org/10.1140/epjc/s10052-023-12137-y
Regular Article - Experimental Physics
Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud
1
National Centre for Nuclear Research (NCBJ), ul. Andrzeja Soltana 7, 05-400, Otwock, Swierk, Poland
2
Institute for Particle Physics and Astrophysics, ETH Zurich, 8093, Zurich, Switzerland
3
Department of Physics, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, 44919, Ulsan, Republic of Korea
4
Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-Université PSL, Collège de France, Campus Pierre et Marie Curie, 4, Place Jussieu, 75005, Paris, France
5
IRFU, CEA, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
6
Affiliated with an Institute Covered by a Cooperation Agreement with CERN, Geneva, Switzerland
7
Université d’Evry-Val d’Essonne, Université Paris-Saclay, Boulevard François Mitterand, 91000, Evry, France
8
Department of Physics, Stockholm University, 10691, Stockholm, Sweden
9
Conservatoire National des Arts et Métiers, 292 rue Saint Martin, 75003, Paris, France
10
Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg UMR 7504, 67000, Strasbourg, France
11
Center for Underground Physics, Institute for Basic Science, 70 Yuseong-daero 1689-gil, Yuseong-gu, 34047, Daejeon, Republic of Korea
12
Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, 08826, Seoul, Republic of Korea
13
Department of Accelerator Science, Korea University Sejong Campus, Sejong-ro 2511, 30019, Sejong, Republic of Korea
14
Institute of Physics, University of Tokyo, 3-8-1 Komaba, Meguro, 153-8902, Tokyo, Japan
15
Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
16
Institut Max von Laue-Paul Langevin (ILL), 71 avenue des Martyrs, 38042, Grenoble, France
17
QUANTUM, Institut für Physik, Johannes Gutenberg Universität, 55128, Mainz, Germany
18
Department of Physics, Faculty of Science and Engineering, Swansea University, SA2 8PP, Swansea, UK
19
CERN, Esplanade des Particules 1, 1217, Meyrin, Switzerland
20
Ulmer Fundamental Symmetries Laboratory, RIKEN, 2-1 Hirosawa, 351-0198, Wako, Saitama, Japan
21
Ångström Laboratory, Department of Chemistry, Uppsala University, Box 523, 75120, Uppsala, Sweden
22
LPNHE/IN2P3, 4, place Jussieu, 75252, Paris, France
23
CERN, Esplanade des Particules 1, 1217, Meyrin, Switzerland
24
6300, Zug, Switzerland
Received:
8
July
2023
Accepted:
13
October
2023
Published online:
6
November
2023
We report on the first production of an antihydrogen beam by charge exchange of 6.1 keV antiprotons with a cloud of positronium in the GBAR experiment at CERN. The 100 keV antiproton beam delivered by the AD/ELENA facility was further decelerated with a pulsed drift tube. A 9 MeV electron beam from a linear accelerator produced a low energy positron beam. The positrons were accumulated in a set of two Penning–Malmberg traps. The positronium target cloud resulted from the conversion of the positrons extracted from the traps. The antiproton beam was steered onto this positronium cloud to produce the antiatoms. We observe an excess over background indicating antihydrogen production with a significance of 3–4 standard deviations.
The original online version of this article was revised: In this article the affiliation details for author P. Adrich were incorrectly given as 1 and 24, but should have been 1. The affiliation details for author A. Welker were incorrectly given as 19 and 22 but should have been 19 and 24. In the acknowledgements section, the sentence “decelerator as well as A.” should be continued as “decelerator as well as A. Sinturel for help and expertise on vacuum”.
An erratum to this article is available online at https://doi.org/10.1140/epjc/s10052-023-12244-w.
Copyright comment corrected publication 2023
© The Author(s) 2023. corrected publication 2023
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3. SCOAP3 supports the goals of the International Year of Basic Sciences for Sustainable Development.
