Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993phdt........40h&link_type=abstract
PhD Dissertation, California Univ. Los Angeles, CA United States
Astronomy and Astrophysics
Astrophysics
Neutrinos, Supernovae, Astrophysics, Cosmology, Dipole Moments, Particle Mass, Particle Theory, Big Bang Cosmology, Black Holes (Astronomy), Radiation Counters, Gamma Ray Bursts
Scientific paper
In the first part of the dissertation, two neutrino properties such as neutrino mass measurement and neutrino dipole moment, in the terrestrial experiments, are examined with particular attention to exotic phenomena that may be observed for theories beyond the Standard Model. In the second part, we study a method for measuring the neutrino mass from a galactic supernova neutrino burst using an innovated detector concept. The neutral current based SNBO (Supernova Neutrino Burst Observatory) detector concept is discussed. We show that it is possible to measure a cosmologically significant neutrino mass, i.e., 5-50 eV directly from the flight time difference between the massive and massless neutrino using the SNBO detector concept. In the third part, very heavy unstable particles from the Big Bang decaying into neutrinos at cosmological epochs is discussed. In particular, we focus on a detection of such relic neutrinos from the decays in the neutrino window on earth, in the energy ranges 10-100 MeV, where the neutrino background is expected to be lowest. In the fourth part, neutrino emission from the explosion of Primordial Black Holes in the context of the Hawking radiation is presented. We suggest a new explosion mechanism inspired by new data from gamma ray bursts that might occur when the Primordial Black Hole reaches a certain surface temperature. We propose some observational tests that use a satellite detector and the proposed SNBO detector. In the last chapter, we examine a possible connection between the baryogenesis in the early universe and the lepton number violation processes.
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