Observation of Three Upsilon States
Open Access
- 28 April 1980
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 44 (17), 1108-1111
- https://doi.org/10.1103/physrevlett.44.1108
Abstract
Three narrow resonances have been observed in 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- levels of the quark-antiquark system.
Keywords
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