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Production of antihydrogen atoms by 6 keV antiprotons through a positronium cloud
Preprint
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
27 June 2023
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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.