APS » PROLA » Phys. Rev. Lett. » Volume 44 » Issue 17

Phys. Rev. Lett. 44, 1104 - 1107 (1980)

Observation of the Production of Short-Lived Particles in a High-Resolution Streamer-Chamber Experiment
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J. Sandweiss, T. Cardello, P. Cooper, S. Dhawan, R. Kellogg *, D. Ljung †, T. Ludlam ‡, R. Majka §, P. McBride, P. Némethy §, L. Rosselet **, A. J. Slaughter, H. D. Taft, L. Teig, and L. Tzeng
Yale University, New Haven, Connecticut 06520

S. Ecklund †† and M. Johnson
Fermi National Accelerator Laboratory, Batavia, Illinois 60510

Received 22 January 1980

Short-lived particles produced in association with muons have been observed in the interactions of 350-GeV/c protons with neon in a high-resolution streamer chamber. The characteristics of these events are consistent with the expected properties of charmed particles if the average lifetime lies between 10-13 and 2×10-12 sec. With the assumption that the observed events are mainly D± mesons with lifetimes of approximately 10-12 sec, the production cross section is estimated to lie between 20 and 50 μb per nucleon.


©1980 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v44/p1104
DOI: 10.1103/PhysRevLett.44.1104
PACS: 13.20.Jf, 14.40.Pe

* Present address: University of Maryland, College Park, Md. 20742.
† Present address: Fermi National Accelerator Laboratory, Batavia, Ill. 60510.
‡ Present address: Brookhaven National Laboratory, Upton, N. Y. 11973.
§ Present address: Lawrence Berkeley Laboratory, Berkeley, Cal. 94720.
** Present address: CERN, Geneva 23, Switzerland.
†† Present address: Stanford Linear Accelerator Center, Stanford, Cal. 94305.

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