Phys. Rev. Lett. 37, 569–571 (1976)Observation of a Narrow Charged State at 1876 MeV/c2 Decaying to an Exotic Combination of KππReceived 21 July 1976; published in the issue dated 6 September 1976 We report evidence for the production of a new narrow charged state in e+e- annihilation at a center-of-mass energy of 4.03 GeV. This state, which has a mass of 1876± 15 MeV/c2, is observed in the exotic channel K∓π±π±, but not in the nonexotic channel K∓π+π-. It is produced primarily in association with a system of mass 2.01±0.02 GeV/c2. These characteristics are just those expected of a charged charmed meson. © 1976 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.37.569
DOI:
10.1103/PhysRevLett.37.569
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