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arXiv · 2306.15801

Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud

P. Adrich·P. Blumer·G. Caratsch·M. Chung·P. Cladé·P. Comini·P. Crivelli·O. Dalkarov·P. Debu·A. Douillet·D. Drapier·P. Froelich·N. Garroum·S. Guellati-Khelifa·J. Guyomard·P-A. Hervieux·L. Hilico·P. Indelicato·S. Jonsell·J-P. Karr·B. Kim·S. Kim·E-S. Kim·Y. J. Ko·T. Kosinski·N. Kuroda·B. M. Latacz·B. Lee·H. Lee·J. Lee·E. Lim·L. Liszkay·D. Lunney·G. Manfredi·B. Mansoulié·M. Matusiak·V. Nesvizhevsky·F. Nez·S. Niang·B. Ohayon·K. Park·N. Paul·P. Pérez·C. Regenfus·S. Reynaud·C. Roumegou·J-Y. Roussé·Y. Sacquin·G. Sadowski·J. Sarkisyan·M. Sato·F. Schmidt-Kaler·M. Staszczak·K. Szymczyk·T. A. Tanaka·B. Tuchming·B. Vallage·A. Voronin·D. P. van der Werf·D. Won·S. Wronka·Y. Yamazaki·K-H. Yoo·P. Yzombard
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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 antiproton beam was delivered by the AD/ELENA facility. The positronium target was produced from a positron beam itself obtained from an electron linear accelerator. We observe an excess over background indicating antihydrogen production with a significance of 3-4 standard deviations.

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P. Adrich, P. Blumer, G. Caratsch, M. Chung, P. Cladé, P. Comini, P. Crivelli, O. Dalkarov, P. Debu, A. Douillet, D. Drapier, P. Froelich, N. Garroum, S. Guellati-Khelifa, J. Guyomard, P-A. Hervieux, L. Hilico, P. Indelicato, S. Jonsell, J-P. Karr, B. Kim, S. Kim, E-S. Kim, Y. J. Ko, T. Kosinski, N. Kuroda, B. M. Latacz, B. Lee, H. Lee, J. Lee, E. Lim, L. Liszkay, D. Lunney, G. Manfredi, B. Mansoulié, M. Matusiak, V. Nesvizhevsky, F. Nez, S. Niang, B. Ohayon, K. Park, N. Paul, P. Pérez, C. Regenfus, S. Reynaud, C. Roumegou, J-Y. Roussé, Y. Sacquin, G. Sadowski, J. Sarkisyan, M. Sato, F. Schmidt-Kaler, M. Staszczak, K. Szymczyk, T. A. Tanaka, B. Tuchming, B. Vallage, A. Voronin, D. P. van der Werf, D. Won, S. Wronka, Y. Yamazaki, K-H. Yoo, P. Yzombard. 2023-06-27. Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud. https://doi.org/10.1140/epjc%2Fs10052-023-12137-y

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