Statistics – Methodology
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phdt........88s&link_type=abstract
Thesis (PH.D.)--HARVARD UNIVERSITY, 1990.Source: Dissertation Abstracts International, Volume: 51-07, Section: B, page: 3428.
Statistics
Methodology
1
Dark Matter
Scientific paper
We consider in this thesis several extensions of the standard model as well as a novel dark matter scenario. First, we propose ways of searching for a light Higgs particle in the standard model and in its generalization to multiple Higgs doublets. Next, we consider two models that enlarge the standard model gauge sector to include an extra Z boson. The second model is remarkably unconstrained by all current experimental data. We go on to study the astrophysical consequences of a triplet fourth family of leptons, and find that the model of Foot, Lew and Joshi is incompatible with supernova observations (unless a new light Higgs exists). These same observations also place stringent bounds on a generalized axion scenario in which both a light axion and a massless Goldstone boson appear. While the scenario we consider is highly specific and calls for numerous unseen particles, the methodology may easily be generalized to constrain other models. Finally, we suggest that the missing mass problem in the universe may be solved by charged particles which we call CHAMPs, and study the bounds imposed on their mass and cross-sections by various astrophysical considerations.
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