A Study of Wrong Sign Muon and Trimuon Events in Neutrino - Nucleon Scattering

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

DOI:https://doi.org/10.2172/1433224· OSTI ID:1433224

Mishra, Sanjib Ratan ^[1]

---

1. Columbia U.

Wrong sign muon events in neutrino-nucleon scattering are characterized by a single muon in the final state carrying lepton number different from that of the incident neutrino. A search for such events in two experiments employing the Fermilab Narrow Band Neutrino beam is reported here. We derive an upper limit of 3.1 X $$10^{-4}$$ on the rate or production of these events. Limits on the intrinsic charm content or the sea ( < .02), llavour changing neutral current ( < .0085), and lepton number violating processes (rate < 7 .1 X $$10^{-5}$$ ) have also been derived. Further, if the lepton number violation is brought about by a massless Majorana neutrino with a non-zero right banded coupling, then these data set the upper limits on the mass or the right handed gauge boson (> 849 GeV) and its mixing angle with the ordinary boson (<.009). The rate and kinematical properties or wrong sign events are compared with those of the neutrino induced dimuon events. Finally we report on a set of 12 neutrino initiated trimuons, with muon momentum > 4.5 GeV. We conclude that the trimuon events could be understood in terms or the hadronic and the radiative production of an extra dimuon pair in a charged current event. ·

• 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: 1433224
• Report Number(s): FERMILAB-THESIS-1986-12; R-1353; CU-365; NEVIS-259; 243761
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS