Baur, G.Boero, G.Brauksiepe, S.Buzzo, A.Eyrich, W.Geyer, R.Grzonka, D.Hauffe, J.Kilian, K.LoVetere, M.Macri, M.Moosburger, M.Nellen, R.Oelert, W.Passagio, S.Pozzo, A.Röhrich, K.Sachs, K.Schepers, G.Sefzick, T.Simon, R.S.Stratmann, R.Stinzing, F.Wolke, M.2015-06-112015-06-112015-06-11199710.1016/S0168-9002(96)01197-7https://infoscience.epfl.ch/handle/20.500.14299/115043The production of antihydrogen atoms H̄0 ≡ p̄e+ has been observed by the PS210 collaboration at LEAR. The method assumes an e+e- -pair creation via the two-photon mechanism in the antiproton-nucleus interaction. Neutral H̄0 atoms are identified by a unique sequence of characteristics. The typical signature of eleven produced antihydrogen atoms is reported including possibly 2±1 background signals. The observed yield agrees with theoretical predictions.text::journal::journal article::research article