Evidence for a narrow NN state at 2.02 GeV/c2 in 6 and 9 GeV/c antiproton interactions

F. Azooz, I. Butterworth, P. J. Dornan, G. Hall, R. A. Stern, A. P. White, R. C. Brown, N. Butler, G. P. Gopal, A. McPherson, R. L. Sekulin, R. Barloutaud, J. L. Cambier, M. Loret, T. Okusawa, R. Stevens, D. Vilanova, J. E. Brau, J. T. Carroll, V. ChaloupkaC. V. Cautis, J. J. Dumont, R. A. Ericson, R. C. Field, D. R. Freytag, J. Y. Grandpeix, T. Kitagaki, S. Tanaka, H. Yuta, K. Abe, K. Hasegawa, Akira Yamaguchi, K. Tamai, H. Takanashi, W. A. Mann, J. Schneps, H. B. Wald

Research output: Contribution to journalArticlepeer-review


We report evidence for the existence of a charged narrow state of mass M ∼ 2.02 GeV/c2 and widtt Γ {less-than or approximate} 0.04 GeV/c2, decaying into N N ̄. The state is observed in the reaction pp→pfast+π-π- at 6 GeV/c and in pp→πfast +pnπ+π- at 9 GeV/c in a triggered bubble chamber experiment at the SLAC Hybrid Facility.

Original languageEnglish
Pages (from-to)471-475
Number of pages5
JournalPhysics Letters B
Issue number5-6
Publication statusPublished - 1983 Mar 17

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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