High rate production of antihydrogen |
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| Affiliation: | 1. Istituto Nazionale di Fisica Nucleare, Sezione di Genova, 16146 Genova, Italy;2. Physik-Institut, Zurich University, CH-8057 Zurich, Switzerland;3. Istituto Nazionale di Fisica Nucleare, Universita di Pavia, 27100 Pavia, Italy;4. Dipartimento di Fisica Nucleare e Teorica, Universita di Pavia, 27100 Pavia, Italy;5. EP Division, CERN, CH-1211 Geneva 23, Switzerland;6. Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark;7. Dipartimento di Fisica, Universita di Genova, 16146 Genova, Italy;8. Instituto de Fisica, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21945-970, Brazil;9. Department of Physics, University of Wales Swansea, Swansea SA2 8PP, UK;10. Atomic Physics Laboratory, RIKEN, Saitama 351-0198, Japan;11. Department of Physics, University of Tokyo, Tokyo 113-0033, Japan;12. Dipartimento di Chimica e Fisica per l''Ingegnieria e per i Materiali, Universita di Brescia, 25123 Brescia, Italy |
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| Abstract: | We show that antihydrogen production is the dominant process when mixing antiprotons and positrons in the ATHENA apparatus, and that the initial production rate exceeds 300 Hz, decaying to 30 Hz within 10 s. A fraction of 65% of all observed annihilations is due to antihydrogen. |
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