Abstract
In an exposure of the Argonne National Laboratory 12 foot hydrogen and deuterium filled bubble chamber to a neutrino beam, a search was made for dilepton events. One such event was found and the mass of the hadronic system is estimated to be about 2 GeV.
Work supported by the U.S.Energy Research and Development Administration.
S. J. Barish (now at Carnegie-Mellon University), M. Derrick, T. Dombeck, B. Musgrave, P. Schreiner, R. Singer, and M. Szczokowski, Argonne National Laboratory; V. E. Barnes, D. D. Carmony, E. Fernandez, and A. F. Garfinkel, Purdue University.
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References
R. E. Shrock and B. W. Lee, Phys. Rev. D13, 2539 (1976).
E. G. Cazzoli et al., Phys. Rev. Letters 34, 1125 (1975).
S. J. Barish et al., Phys. Rev. Letters 33, 1446 (1974).
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B. C. Barish et al., Phys. Rev. Letters 36, 939 (1976).
Our single-pion reactions were discussed in S. J. Barish et al., Phys. Rev. Letters 36, 179 (1976).
We would expect to detect roughly one ̄v e event in the entire film sample. One event with an energy of ~ 0.6 GeV and giving a zero constraint solution to ̄v e d → e+π- nps with an identified positron (P = 142 MeV/c) and an identified π- as well as a short spectator proton has been found.
Assuming a spectator neutron along the beam of ~ 300 MeV/c, it is possible to put a ~ 400 MeV/c K° directly along the beam direction and obtain a mass of 2.425 Gev/c2.
The phase space prediction for the 3 pion effective mass while broad does peak near the eta mass and thus evidence for the eta is not compelling.
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© 1977 Friedr. Vieweg & Sohn Verlagsgesellschaft mbH, Braunschweig
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Carmony, D.D., Argonne National Lab - Purdue Collaboration. (1977). A Neutrino Induced Dilepton Event in the ANL 12 Foot Bubble Chamber. In: Faissner, H., Reithler, H., Zerwas, P. (eds) Proceedings of the International Neutrino Conference Aachen 1976. Vieweg+Teubner Verlag. https://doi.org/10.1007/978-3-322-90614-4_12
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DOI: https://doi.org/10.1007/978-3-322-90614-4_12
Publisher Name: Vieweg+Teubner Verlag
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