Sarikas, Srdjan (2011) Neutrino oscillations at high densities: cosmological and astrophysical aspects. [Tesi di dottorato] (Unpublished)
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| Item Type: | Tesi di dottorato |
|---|---|
| Resource language: | English |
| Title: | Neutrino oscillations at high densities: cosmological and astrophysical aspects |
| Creators: | Creators Email Sarikas, Srdjan sarikas@na.infn.it |
| Date: | 2011 |
| Number of Pages: | 105 |
| Institution: | Università degli Studi di Napoli Federico II |
| Department: | Scienze fisiche |
| Scuola di dottorato: | Scienze fisiche |
| Dottorato: | Fisica fondamentale ed applicata |
| Ciclo di dottorato: | 24 |
| Coordinatore del Corso di dottorato: | nome email Velotta, Raffaele velotta@na.infn.it |
| Tutor: | nome email Miele, Gennaro miele@na.infn.it Mangano, Gianpiero mangano@na.infn.it |
| Date: | 2011 |
| Number of Pages: | 105 |
| Keywords: | neutrinos, big bang nucleosynthesis, neutrino:supernova, neutrino:asymmetry, neutrino:oscillations, lepton number, physics of the early universe, primordial asymmetries, MSW effect, neutrino:mass hierarchy, stability analysis |
| Settori scientifico-disciplinari del MIUR: | Area 02 - Scienze fisiche > FIS/02 - Fisica teorica, modelli e metodi matematici Area 02 - Scienze fisiche > FIS/04 - Fisica nucleare e subnucleare Area 02 - Scienze fisiche > FIS/05 - Astronomia e astrofisica |
| Date Deposited: | 05 Dec 2011 11:25 |
| Last Modified: | 30 Apr 2014 19:47 |
| URI: | http://www.fedoa.unina.it/id/eprint/8573 |
| DOI: | 10.6092/UNINA/FEDOA/8573 |
Collection description
This doctoral thesis treats the effects of neutrino oscillations in the early universe and supernovae. The main probe for the context of the early universe is big bang nucleosynthesis (BBN). I explain the general link between neutrinos and BBN with an emphasis on the degeneracy between neutrino asymmetry and extra degrees of freedom. I show how the degenerate effects of both oscillations and collisions lead to observables detectable in the near future that brake this degeneracy and draw bounds on neutrino asymmetry and their contribution to the energy density of the universe in the current epoch. Considering astrophysical aspects, I analyze the significance of a proper treatment of neutrino evolution to understand the neutrino signal from the next galactic supernova (SN). I show the type of effects collective neutrino conversions can produce and the numerical difficulties confronted. Finally, I show how that stability analysis can complement a numerical treatment and provide definitive answers in some example cases.
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