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Final results of a search for free neutron-antineutron oscillations

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Il Nuovo Cimento A (1965-1970)

Summary

The final analysis of the data collected in a search for free\(n - \bar n\) oscillations is presented. The experiment has been carried out at the Triga Mark II reactor of the Pavia University. A thermal neutrons current of 3.2·1010s−1 propagates in a quasi-free condition for an average time of flight of 8ms and impinges on two thin targets. The possible antineutron annihilation products would be detected in the first target. The second target works as a monitor of the background. No evidence for\(n - \bar n\) transitions is found. A lower limit of 4.9·105s (90% c.l.) has been reached, with «zero» signal and with «zero» background events.

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Author notes

  1. D. Scannicchio

    Present address: Istituto di Matematica e Fisica, Università di Sassari, Sassari, Italia

Authors and Affiliations

  1. Dipartimento di Fisica Nucleare e Teorica dell’Università, Pavia

    G. Bressi, E. Calligarich, M. Cambiaghi, R. Dolfini, M. Genoni, A. Gigli Berzolari, A. Lanza, G. Liguori, F. Mauri, A. Piazzoli, S. P. Ratti, D. Scannicchio & P. Torre

  2. INFN, Sezione di Pavia, Pavia, Italia

    G. Bressi, E. Calligarich, M. Cambiaghi, R. Dolfini, M. Genoni, A. Gigli Berzolari, A. Lanza, G. Liguori, F. Mauri, A. Piazzoli, S. P. Ratti, D. Scannicchio & P. Torre

  3. Dipartimento di Fisica dell’Università «La Sapienza», Roma

    C. Bini, M. Conversi, G. De Zorzi, P. Gauzzi, F. Massa & D. Zanello

  4. INFN, Sezione di Roma, Roma, Italia

    C. Bini, M. Conversi, G. De Zorzi, P. Gauzzi, F. Massa, D. Zanello, R. Cardarelli & R. Santonico

  5. Dipartimento di Fisica dell’Università «Tor Vergata», Roma

    R. Cardarelli & R. Santonico

  6. Centro Studi ed Esperienze E. Fermi, CESNEF, Politecnico di Milano, Milano

    M. Terrani

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  1. G. Bressi
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Additional information

Marcello Conversi died on September 27th 1988. The present paper is dedicated to his memory.

Partly supported by Ministero della Pubblica Istruzione.

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Bressi, G., Calligarich, E., Cambiaghi, M. et al. Final results of a search for free neutron-antineutron oscillations. Nuov Cim A 103, 731–750 (1990). https://doi.org/10.1007/BF02789025

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  • DOI: https://doi.org/10.1007/BF02789025

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