APS » PROLA » Phys. Rev. Lett. » Volume 37 » Issue 10

Phys. Rev. Lett. 37, 569 - 571 (1976)

Observation of a Narrow Charged State at 1876 MeV/c2 Decaying to an Exotic Combination of Kππ
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I. Peruzzi et al.
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Received 21 July 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/abstract/PRL/v37/p569
DOI: 10.1103/PhysRevLett.37.569

* Permanent address: Laboratory Nazionali, Frascati, Rome, Italy.
† Permanent address: Laboratoire de Physique Nucléaire et Hautes Energies, Université Paris, VI, Paris, France.
‡ Miller Institute for Basic Research in Science, Berkeley, Calif. 94701 (1975-1976).
§ Fellow of Deutsche Forschungsgemeinschaft.
** Permanent address: Varian Associates, Palo Alto, Calif. 94305.
†† Permanent address: Centre d'Etudes Nucléaires de Saclay, France.
‡‡ Permanent address: Institute de Physique Nucléaire, Orsay, France.

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