Abstract

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.

Details

Title
Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud
Author
Adrich, P. 1 ; Blumer, P. 2 ; Caratsch, G. 2 ; Chung, M. 3 ; Cladé, P. 4 ; Comini, P. 5 ; Crivelli, P. 2 ; Dalkarov, O. 6 ; Debu, P. 5 ; Douillet, A. 7 ; Drapier, D. 4 ; Froelich, P. 8 ; Garroum, N. 9 ; Guellati-Khelifa, S. 10 ; Guyomard, J. 4 ; Hervieux, P.-A. 11 ; Hilico, L. 7 ; Indelicato, P. 4 ; Jonsell, S. 12 ; Karr, J.-P. 7 ; Kim, B. 13 ; Kim, S. 14 ; Kim, E.-S. 15 ; Ko, Y. J. 13 ; Kosinski, T. 1 ; Kuroda, N. 16 ; Latacz, B. M. 17 ; Lee, B. 14 ; Lee, H. 14 ; Lee, J. 13 ; Lim, E. 15 ; Liszkay, L. 5 ; Lunney, D. 18 ; Manfredi, G. 11 ; Mansoulié, B. 5 ; Matusiak, M. 1 ; Nesvizhevsky, V. 19 ; Nez, F. 4 ; Niang, S. 20 ; Ohayon, B. 2 ; Park, K. 21 ; Paul, N. 4 ; Pérez, P. 5   VIAFID ORCID Logo  ; Regenfus, C. 2 ; Reynaud, S. 4 ; Roumegou, C. 18 ; Roussé, J.-Y. 5 ; Sacquin, Y. 5 ; Sadowski, G. 5 ; Sarkisyan, J. 2 ; Sato, M. 16 ; Schmidt-Kaler, F. 22 ; Staszczak, M. 1 ; Szymczyk, K. 1 ; Tanaka, T. A. 16 ; Tuchming, B. 5 ; Vallage, B. 5 ; Voronin, A. 6 ; van der Werf, D. P. 23 ; Welker, A. 24 ; Won, D. 14 ; Wronka, S. 1 ; Yamazaki, Y. 25 ; Yoo, K.-H. 3 ; Yzombard, P. 4 

1  National Centre for Nuclear Research (NCBJ), Otwock, Poland (GRID:grid.450295.f) (ISNI:0000 0001 0941 0848) 
2  ETH Zurich, Institute for Particle Physics and Astrophysics, Zurich, Switzerland (GRID:grid.5801.c) (ISNI:0000 0001 2156 2780) 
3  Ulsan National Institute of Science and Technology (UNIST), Department of Physics, Ulsan, Republic of Korea (GRID:grid.42687.3f) (ISNI:0000 0004 0381 814X) 
4  Sorbonne Université, CNRS, ENS-Université PSL, Collège de France, Campus Pierre et Marie Curie, Laboratoire Kastler Brossel, Paris, France (GRID:grid.410533.0) (ISNI:0000 0001 2179 2236) 
5  Université Paris-Saclay, IRFU, CEA, Gif-sur-Yvette, France (GRID:grid.460789.4) (ISNI:0000 0004 4910 6535) 
6  Affiliated with an Institute Covered by a Cooperation Agreement with CERN, Geneva, Switzerland (GRID:grid.9132.9) (ISNI:0000 0001 2156 142X) 
7  Sorbonne Université, CNRS, ENS-Université PSL, Collège de France, Campus Pierre et Marie Curie, Laboratoire Kastler Brossel, Paris, France (GRID:grid.410533.0) (ISNI:0000 0001 2179 2236); Université d’Evry-Val d’Essonne, Université Paris-Saclay, Evry, France (GRID:grid.8390.2) (ISNI:0000 0001 2180 5818) 
8  Stockholm University, Department of Physics, Stockholm, Sweden (GRID:grid.10548.38) (ISNI:0000 0004 1936 9377); Uppsala University, Ångström Laboratory, Department of Chemistry, Uppsala, Sweden (GRID:grid.8993.b) (ISNI:0000 0004 1936 9457) 
9  Sorbonne Université, CNRS, ENS-Université PSL, Collège de France, Campus Pierre et Marie Curie, Laboratoire Kastler Brossel, Paris, France (GRID:grid.410533.0) (ISNI:0000 0001 2179 2236); LPNHE/IN2P3, Paris, France (GRID:grid.410533.0) 
10  Sorbonne Université, CNRS, ENS-Université PSL, Collège de France, Campus Pierre et Marie Curie, Laboratoire Kastler Brossel, Paris, France (GRID:grid.410533.0) (ISNI:0000 0001 2179 2236); Conservatoire National des Arts et Métiers, Paris, France (GRID:grid.36823.3c) (ISNI:0000 0001 2185 090X) 
11  Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg UMR 7504, Strasbourg, France (GRID:grid.11843.3f) (ISNI:0000 0001 2157 9291) 
12  Stockholm University, Department of Physics, Stockholm, Sweden (GRID:grid.10548.38) (ISNI:0000 0004 1936 9377) 
13  Institute for Basic Science, Center for Underground Physics, Daejeon, Republic of Korea (GRID:grid.410720.0) (ISNI:0000 0004 1784 4496) 
14  Seoul National University, Department of Physics and Astronomy, Seoul, Republic of Korea (GRID:grid.31501.36) (ISNI:0000 0004 0470 5905) 
15  Korea University Sejong Campus, Department of Accelerator Science, Sejong, Republic of Korea (GRID:grid.222754.4) (ISNI:0000 0001 0840 2678) 
16  University of Tokyo, Institute of Physics, Tokyo, Japan (GRID:grid.26999.3d) (ISNI:0000 0001 2169 1048) 
17  Université Paris-Saclay, IRFU, CEA, Gif-sur-Yvette, France (GRID:grid.460789.4) (ISNI:0000 0004 4910 6535); CERN, Meyrin, Switzerland (GRID:grid.9132.9) (ISNI:0000 0001 2156 142X) 
18  Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France (GRID:grid.508754.b) 
19  Institut Max von Laue-Paul Langevin (ILL), Grenoble, France (GRID:grid.156520.5) (ISNI:0000 0004 0647 2236) 
20  Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France (GRID:grid.508754.b); CERN, Meyrin, Switzerland (GRID:grid.9132.9) (ISNI:0000 0001 2156 142X) 
21  Institute for Basic Science, Center for Underground Physics, Daejeon, Republic of Korea (GRID:grid.410720.0) (ISNI:0000 0004 1784 4496); Seoul National University, Department of Physics and Astronomy, Seoul, Republic of Korea (GRID:grid.31501.36) (ISNI:0000 0004 0470 5905) 
22  Johannes Gutenberg Universität, QUANTUM, Institut für Physik, Mainz, Germany (GRID:grid.5802.f) (ISNI:0000 0001 1941 7111) 
23  Swansea University, Department of Physics, Faculty of Science and Engineering, Swansea, UK (GRID:grid.4827.9) (ISNI:0000 0001 0658 8800) 
24  CERN, Meyrin, Switzerland (GRID:grid.9132.9) (ISNI:0000 0001 2156 142X); 6300, Zug, Switzerland (GRID:grid.9132.9) 
25  RIKEN, Ulmer Fundamental Symmetries Laboratory, Wako, Japan (GRID:grid.7597.c) (ISNI:0000 0000 9446 5255) 
Pages
1004
Publication year
2023
Publication date
Nov 2023
Publisher
Springer Nature B.V.
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1140/epjc/s10052-023-12137-y
ProQuest document ID
2886463467
Copyright
© The Author(s) 2023. corrected publication 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.