The observation of the production of antihydrogen atoms \overlineH 0\equiv\barpe+, the simplest atomic bound state of antimatter, is presented. A method has been used by the PS210 collaboration at LEAR which assumes that the production of <(H)over bar (0)> is predominantly mediated by the e(+)e(-) pair creation via the two-photon mechanism in the antiproton-nucleus interaction. Neutral <(H)over bar (0)> atoms are indentified by a unique sequence of characteristics. In principle <(H)over bar (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 had not been observed. The production of eleven antihydrogen atoms is reported including possibly 2 +/- 1 background signals, the observed yield agrees with theoretical predictions.

### Observation of antihydrogen production in flight at CERN

#### Abstract

The observation of the production of antihydrogen atoms \overlineH 0\equiv\barpe+, the simplest atomic bound state of antimatter, is presented. A method has been used by the PS210 collaboration at LEAR which assumes that the production of <(H)over bar (0)> is predominantly mediated by the e(+)e(-) pair creation via the two-photon mechanism in the antiproton-nucleus interaction. Neutral <(H)over bar (0)> atoms are indentified by a unique sequence of characteristics. In principle <(H)over bar (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 had not been observed. The production of eleven antihydrogen atoms is reported including possibly 2 +/- 1 background signals, the observed yield agrees with theoretical predictions.
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1997
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/813003
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