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Phys. Rev. Lett. 43, 1774–1777 (1979)

Observation of Missing Energy Associated with μ+μ- Produced in p-Fe Interactions

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A. Diamant-Berger*, J. P. Dishaw†, M. Faessler‡, J. K. Liu§, F. S. Merritt**, and S. G. Wojcicki
Stanford University, Stanford, California 94305

B. C. Barish, J. F. Bartlett††, A. Bodek‡‡, K. W. B. Merritt, M. H. Shaevitz, and E. J. Siskind
California Institute of Technology, Pasadena, California 91125

Received 5 September 1979; published in the issue dated 10 December 1979

In a study of interactions of 400-GeV protons in an iron calorimeter, we have observed μ+μ- pairs associated with a significant amount of missing energy indicative of final-state neutrinos. This missing energy is not due to any instrumental effects, nor to any trivial sources like double KK̅ (or ππ) decay. Interpretation of these data as production of a DD̅ pair followed by a double muonic decay leads to a model-dependent estimate of a total production cross section of the order of 7-20 μb.

© 1979 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.43.1774
DOI:
10.1103/PhysRevLett.43.1774
PACS:

*Permanent address: Département de Physique des Particules, Centre d'Etudes Nucléaires de Saclay, Gif-sur-Yvette, France.

†Present address: Intel Corporation, Santa Clara, Cal. 95051.

‡Present address: CERN, Geneva, Switzerland.

§Presently with Global Union Bank, Wall Street Plaza, N.Y. 10095.

**Present address: University of Chicago, Chicago, Ill. 60637.

††Present address: Fermilab, Batavia, Ill. 60510.

‡‡Present address: University of Rochester, Rochester, N.Y. 14727.

 
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