First measurement of the depolarization parameter D0 n0 n of the [formula omitted] charge-exchange reaction

• Published in: Physics letters. B Vol. 302; no. 4; pp. 517 - 522
• Main Authors: Birsa, R., Bradamante, F., Bressan, A., Dalla Torre-Colautti, S., Giorgi, M., Lamanna, M., Martin, A., Penzo, A., Schiavon, P., Tessarotto, F., Macciotta, M.P., Masoni, A., Puddu, G., Serci, S., Niinikoski, T., Rijllart, A., Ahmidouch, A., Heer, E., Hess, R., Lechanoine-Le Luc, C., Mascarini, C., Rapin, D., Faivre, J.C., Perrot-Kunne, F., Arvieux, J., Bertini, R., Kunne, R.A., Agnello, M., Iazzi, F., Minetti, B., Bressani, T., Chiavassa, E., De Marco, N., Musso, A., Piccotti, A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 1993
• ISSN: 0370-2693; 1873-2445
• DOI: 10.1016/0370-2693(93)90436-L

The depolarization parameter D 0 n0 n in the charge-exchange reaction pp ↑→ nn ↑ has been measured for the first time at the CERN Low Energy Antiproton Ring (LEAR) at 875 MeV/ c antiproton beam momentum, in the forward hemisphere. The measured values of D 0 n0 n are always smaller than ±0.3, indicating that the two-spin amplitudes dominate the scattering matrix as suggested by the meson exchange potential models.