Neutrino textures in light of Super-Kamiokande data and a realistic string model
| dc.contributor.author | Ellis, J. | en |
| dc.contributor.author | Leontaris, G. K. | en |
| dc.contributor.author | Lola, S. | en |
| dc.contributor.author | Nanopoulos, D. V. | en |
| dc.date.accessioned | 2015-11-24T18:40:05Z | |
| dc.date.available | 2015-11-24T18:40:05Z | |
| dc.identifier.issn | 1434-6044 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/17552 | |
| dc.rights | Default Licence | - |
| dc.subject | su(5)xu(1) superstring model | en |
| dc.subject | dark-matter cosmology | en |
| dc.subject | gauge symmetries | en |
| dc.subject | family symmetry | en |
| dc.subject | solar model | en |
| dc.subject | mass | en |
| dc.subject | oscillations | en |
| dc.subject | renormalization | en |
| dc.subject | flux | en |
| dc.subject | hot | en |
| dc.title | Neutrino textures in light of Super-Kamiokande data and a realistic string model | en |
| heal.abstract | Motivated by the Super-Kamiokande atmospheric neutrino data, we discuss possible textures for Majorana and Dirac neutrino masses within the see-saw framework. There are two main purposes of this paper: first, to gain intuition into this area from a purely phenomenological analysis, and second, to explore to what extent it may be realized in a specific model. We comment initially on the simplified two-generation case, emphasizing that large mixing is not incompatible with a large hierarchy of mass eigenvalues. We also emphasize that renormalization-group effects may amplify neutrino mixing, and we present semi-analytic expressions for estimating this amplification. Several examples are then given of three-family neutrino mass textures, which may also accommodate the persistent solar neutrino deficit, with different assumptions for the neutrino Dirac mass matrices. We comment on a few features of neutrino mass textures arising in models with a U(1) flavour symmetry. Finally, we discuss the possible pattern of neutrino masses in a "realistic" flipped SU(5) model derived from string theory, illustrating how a desirable pattern of mixing may emerge. Both small- or large-angle MSW solutions are possible, while a hierarchy of neutrino masses appears more natural than near-degeneracy. This model contains some unanticipated features that may be relevant in other models also: The neutrino Dirac matrices may not be related closely to the quark mass matrices, and the heavy Majorana states may include extra gauge-singlet fields. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.secondary | <Go to ISI>://000081881500003 | - |
| heal.identifier.secondary | http://www.springerlink.com/content/buvgk9rkc6d3dwf2/fulltext.pdf | - |
| heal.journalName | European Physical Journal C | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 1999 | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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