Observation of three upsilon states

D. Andrews, K. Berkelman, M. Billing, R. Cabenda, D. G. Cassel, J. W. DeWire, R. Ehrlich, T. Ferguson, T. Gentile, B. G. Gibbard, M. G.D. Gilchriese, B. Gittelman, D. L. Hartill, D. Herrup, M. Herzlinger, D. L. Kreinick, D. Larson, N. B. Mistry, E. Nordberg, S. PeggsR. Perchonok, R. K. Plunkett, J. Seeman, K. A. Shinsky, R. H. Siemann, A. Silverman, P. C. Stein, S. Stone, R. Talman, H. G. Thonemann, D. Weber, C. Bebek, J. Haggerty, J. M. Izen, R. Kline, W. A. Loomis, F. M. Pipkin, W. Tanenbaum, Richard Wilson, A. J. Sadoff, D. L. Bridges, K. Chadwick, P. Ganci, H. Kagan, F. Lobkowicz, W. Metcalf, S. L. Olsen, R. Poling, C. Rosenfeld, G. Rucinski

Research output: Contribution to journalArticlepeer-review

95 Scopus citations


Three narrow resonances have been observed in e+e- annihilation into hadrons at total energies between 9.4 and 10.4 GeV. Measurements of mass spacing and ratios of lepton pair widths support the interpretation of these " " states as the lowest triplet-S levels of the bb̄ quark-antiquark system.

Original languageEnglish (US)
Pages (from-to)1108-1111
Number of pages4
JournalPhysical review letters
Issue number17
StatePublished - 1980

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