Dimuon Production by High-Energy Neutrino and anti-neutrino in the Fermilab 15-Ft Bubble Chamber

Thesis/Dissertation · Sat Sep 01 04:00:00 EDT 1979

DOI:https://doi.org/10.2172/1131298· OSTI ID:1131298

Orthel, John L. ^[1]

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1. Univ. of California, Berkeley, CA (United States)

The Fermilab fifteen foot bubble chamber/two-plane External Muon Identifier (EMO hybrid detector filled with Ne(47% atomic)-H₂ is exposed to the quadrupole triplet beam ( vμ > = 89 GeV, $$\bar{v}$$μ > = 60 GeV). In 326000 pie- "' μ. tures there are 10148 neutrino and 1773 antineutrino charged current events with two-plane EMI muon identification and muon momenta > 4 GeV /c. In this sample there are 55 μ^-μ⁺X, 11μ^-μ^-X and 0 μ⁺μ⁺X candidates with muon momenta > 4 GeV /c. The like-sign events are consistent with background. The opposite-sign dimuons occur at R_μμ = 0.35$$+\atop{-}$$0.10% of the single muon rate. The vμ -induced μ^-μ⁺ rate is 0.20+0.15% below E_vμ = 100 GeV and 0.50$$+\atop{-}$$0.30% above 100 GeV. In the opposite sign dimuons there are IO candidates with an associated V⁰ implying 0.76$$+\atop{-}$$0.36 neutral strange particle per opposite sign dimuon event. The production rate, excess of neutral strange particles, and kinematic distributions of the dimuon events are consistent with the charm model predictions.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1131298
• Report Number(s): UMI--80-14836
• Country of Publication: United States
• Language: English

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