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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents



ID: 542975.0, MPI für Physik / MPI für Physik
Collective neutrino oscillations in non-spherical geometry
Authors:Dasgupta, B.; Dighe, A.; Mirizzi, A.; Raffelt, G. G.
Date of Publication (YYYY-MM-DD):2008
Title of Journal:Physical Review D
Journal Abbrev.:Phys.Rev.D
Issue / Number:78
Start Page:033014
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:The rich phenomenology of collective neutrino oscillations has been studied only in one-dimensional or spherically symmetric systems. Motivated by the non-spherical example of coalescing neutron stars, presumably the central engines of short gamma-ray bursts, we use the Liouville equation to formulate the problem for general source geometries. Assuming the neutrino ensemble displays self-maintained coherence, the problem once more becomes effectively one-dimensional along the streamlines of the overall neutrino flux. This approach for the first time provides a formal definition of the ``single-angle approximation'' frequently used for supernova neutrinos and allows for a natural generalization to non-spherical geometries. We study the explicit example of a disk-shaped source as a proxy for coalescing neutron stars.
Classification / Thesaurus:Astroparticle Physics
Comment of the Author/Creator:14 pages, 6 eps figures
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
Identifiers:LOCALID:MPP-2008-47
URL:http://www.slac.stanford.edu/spires/find/hep/www?r...
URL:http://arXiv.org/abs/arxiv:0805.3300
URL:http://publications.mppmu.mpg.de/?action=search&mp...
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