Abstract
We report on a search forv μ-induced events where the single emerging muon carries lepton number opposite that of the incident neutrino. The rate and kinematic quantities of the candidate events are compared with known backgrounds from\(\bar v_\mu \)-induced charged current interactions and ν-induced interactions that produce dileptons. We derive an upper limit on the rate of wrong-sign single muon production relative to the rate ofv μ charged current interactions to be 1.6×10−4 fory<0.5 and 3.1×10−4 fory>0.5 (90% CL). These upper limits enable us to constrain exotic sources of wrong-sign muons such as the charm component of the nucleon sea, flavor changing neutral currents and lepton number violating processes. Finally, the rate and kinematic properties of these events are compared with those of the neutrino-induced opposite-sign dimuon events.
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References
K. Lang et al.: Z. Phys. C — Particle and Fields 33 (1987) 483 and references therein
M. Veltman: UM 83-22 (1983), Univ. of Michigan Preprint
D. Schildknecht in: XIX Rencontre de Moriond, La Plagne, 1984
B.A. Schumm et al.: Phys. Rev. Lett. 60 (1988) 1618
V. Berger et al.: Nucl. Phys. B123 (1977) 132
D.A. Edwards, F.J. Sciulli. Sciulli: Fermilab Preprint T.M.-660, 2972.000
R.E. Blair et al.: Nucl. Instrum. Methods, 226 (1984) 281
G. Fisk, F.J. Sciulli: Ann. Rev. Part. Sci. 32 (1982) 499
D. MacFarlane et al.: Z. Phys. C — Particle and Fields 26 (1984) 1
The direction of the secondary beam was monitored by the splitplate ionization chambers. For details see [7]
Events due tov π andv K were distinguished by comparing the energy expected from the transverse radial position of the interaction and measured total energy. Once this separation was made the transverse radius at the detector and the mean energy of the secondary meson determined the incident neutrino energy
F.S. Merritt et al.: Nucl. Instrum. Methods A245 (1986) 27
S. Brodsky et al.: Phys. Lett. 93B (1980) 451; Phys. Rev. D23 (1981) 2745
A. Bodek et al.: Phys. Lett. 113B (1982) 77
M. Holder et al.: Phys. Lett. 74B (1978) 277
I.E. Stockdale et al.: Phys. Rev. Lett. 52 (1984) 1384; Z. Phys. C — Particles and Fields 27 (1985) 53
M. Shaevitz, in: Proceedings of 1983 International Symposium on Lepton and Photon Interactions at High Energies, D.G. Cassell, D.L. Kreinick (eds.) 1983, p. 132
H.W. Atherton et al.: CERN 80-07, 22 1980. A separate parametrization of the Atherton et al. data has been put forward by A.J. Malensek: FNAL Technical Memo, FN-341, 2941, 000
D. Carey: Turtle, Fermilab Preprint NAL-64, 2041.000
S. Mori: Estimated event rates for beam dump experiments. FNAL TM-774, 2251.000, 1978; and also: Estimatedv τ flux from a beam dump at 400 GeV and 1000 GeV. FNAL TM-848, 2251.000, 1979
C.H. Albright et al.: Signal forv t events in a beam dump experiment. Fermilab-conf-79/36-THY, 1979
H. Albramowicz et al.: Prompt neutrino production in proton beam dump experiment. CERN-EP/82-17, 1982
H. Wachsmuth: Neutrino and Muon fluxes in the CERN 400 GeV proton beam dump experiment. CERN-EP/79-125, 1979
P. Reutens et al.: Phys. Lett. 152B (1985) 404
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Mishra, S.R., Auchincloss, P.S., Blair, R. et al. A study of wrong-sign single muon production inv μ-nucleon interaction. Z. Phys. C - Particles and Fields 44, 187–198 (1989). https://doi.org/10.1007/BF01557324
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DOI: https://doi.org/10.1007/BF01557324