Search for Neutral Heavy Leptons in Neutrino - Nucleon Interactions at the FNAL Tevatron

Thesis/Dissertation · Mon Jan 01 04:00:00 EST 1990

DOI:https://doi.org/10.2172/1427744· OSTI ID:1427744

de Barbaro, Pawel ^[1]

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1. Rochester U.

The search for Neutral Heavy Leptons (NHL) ha the Neutrino-Nucleon ($$\nu$$-N) interactions has been conducted using the CCFR Detector and the Fermilab Quad Triplet Beam. (FNAL-E744 and FNAL-E770). No evidence for NHL was found in the charged current decay channel, NHL$$\to \mu^-$$ + X. NHL with masses between 0.5 and 3.0 $$GeV /c^{2}$$ were excluded for coupling to muons below 1 to $$10^{-4}$$ of Fermi strength, depending on the NHL mass. An excess of 5.2 +/· 2.3 NHL candidates, in the neutral current decay channel, NHL $$\to \nu$$ + X, was found for events with the separation between the production vertex and the decay vertex greater than 2.3 meters. No evidence for NHL was found in the neutral current decay channel, NHL$$ \to \nu$$ +X for events with the separation between the production vertex and the decay vertex between 0.6 meters and 2.3 meters. NHL with masses between 0.5 and 2.0 $$GeV /c^{2}$$ were excluded for coupling to muon neutrinos below 1 to 5 x $$10^{-4}$$ of Fermi strength, depending on the NHL mass.

• Research Organization: Fermi National Accelerator Laboratory (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: 1427744
• Report Number(s): FERMILAB-THESIS-1990-20; UR-1233; ER-13065-685; UMI-92-10216-MC; 307358
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS