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Título

Probing nonstandard neutrino interactions with supernova neutrinos

Autor Esteban-Pretel, Andreu ; Tomàs, Ricard ; Valle, José W. F.
Palabras clave Core-collapse supernovae
Massless neutrinos
Resonant amplification
Electroweak parameters
Solar neutrinos
Matter density
Neutrino oscillations
Scattering
Fecha de publicación 10-sep-2007
EditorAmerican Physical Society
Citación Physical Review D 76(5): 053001 (2007)
ResumenWe analyze the possibility of probing nonstandard neutrino interactions (NSI, for short) through the detection of neutrinos produced in a future galactic supernova (SN). We consider the effect of NSI on the neutrino propagation through the SN envelope within a three-neutrino framework, paying special attention to the inclusion of NSI-induced resonant conversions, which may take place in the most deleptonized inner layers. We study the possibility of detecting NSI effects in a Megaton water Cherenkov detector, either through modulation effects in the (nu)[overline](e) spectrum due to (i) the passage of shock waves through the SN envelope, (ii) the time dependence of the electron fraction, and (iii) the Earth matter effects; or, finally, through the possible detectability of the neutronization nu(e) burst. We find that the (nu)[overline](e) spectrum can exhibit dramatic features due to the internal NSI-induced resonant conversion. This occurs for nonuniversal NSI strengths of a few %, and for very small flavor-changing NSI above a few x 10^(-5).
Descripción 17 pages, 12 figures.-- PACS nrs.: 13.15.+g; 14.60.Lm; 14.60.St; 97.60.Bw.-- ISI Article Identifier: 000249786800015.-- ArXiv pre-print available at: http://arxiv.org/abs/0704.0032
Versión del editorhttp://dx.doi.org/10.1103/PhysRevD.76.053001
URI http://hdl.handle.net/10261/9162
DOI10.1103/PhysRevD.76.053001
ISSN1550-7998
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