Abstract
Results are presented for a measurement for the production of the antihydrogen atom H 0 ≡ p e + , the simplest atomic bound state of antimatter. A method has been used by the PS210 collaboration at LEAR which assumes that the production of H 0 is predominantly mediated by the e +e −-pair creation via the two-photon mechanism in the antiproton-nucleus interaction. Neutral H 0 atoms are identified by a unique sequence of characteristics. In principle H 0 is well suited for investigations of fundamental CPT violation studies under different forces, however, in our investigations we concentrate on the production of this antimatter object, since so far it has never been observed before. The production of 11 antihydrogen atoms is reported including possibly 2±1 background signals, the observed yield agrees with theoretical predictions.
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