Study of Weak Neutral and Charged Current Interactions in Deuterium.
This thesis deals with the first analyses coming from a high energy neutrino-deuterium bubble chamber experiment. The Fermi National Accelerator Laboratory's 15 foot bubble chamber (with an external muon identifier) served as both target and detector. The ratio of the number of neutrino -neutron charged current events to the number of proton target interactions was found to be 1.92+/-0.17. A smaller sample of antineutrino induced events was used to measure the neutron to proton ratio, 0.65+/-0.09. These two results are compatible with the simple quark parton model. Monte Carlo corrections were used to extract the Bjorken x distribution from data. The x distribution of neutrons was observed to be wider than that of protons as expected from electroproduction data. Bjorken y distributions from both targets were flat. Evidence of scaling violation was exhibited by the data. Neutral current coupling constants were deduced by measuring the neutral to charged current cross section ratio in neutrino-neutron and neutrino proton collisions separately. The proton target ratio, 0.50+/-0.08, was consistent with previous results. Neutron target events gave a ratio of 0.21+/-0.03, the first measurement of that quantity. Neutral current coupling constants were deduced to be U(,L)('2) = 0.20+/-0.08, D(,L)('2) = 0.11+/-0.07, a result consistent with the Weinberg Salam model.
- Pub Date:
- Physics: Elementary Particles and High Energy