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Nonstandard neutrino-neutrino refractive effects in dense neutrino gases
2008 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 78, no 11, 113004- p.Article in journal (Refereed) Published
Abstract [en]

 We investigate the effects of nonstandard four-fermion neutrino-neutrino interactions on the flavor evolution of dense neutrino gases. We find that in the regions where the neutrino-neutrino refractive index leads to collective flavor oscillations, the presence of new neutrino interactions can produce flavor equilibration in both normal and inverted neutrino mass hierarchy. In realistic supernova environments, these effects are significant if the nonstandard neutrino-neutrino interaction strength is comparable to the one expected in the standard case, dominating the ordinary matter potential. However, very small nonstandard neutrino-neutrino couplings are enough to trigger the usual collective neutrino flavor transformations in the inverted neutrino mass hierarchy, even if the mixing angle vanishes exactly.

Place, publisher, year, edition, pages
2008. Vol. 78, no 11, 113004- p.
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-107150DOI: 10.1103/PhysRevD.78.113004ISI: 000262252200014OAI: oai:DiVA.org:kth-107150DiVA: diva2:574765
Note

QC 20130513

Available from: 2012-12-06 Created: 2012-12-06 Last updated: 2017-12-07Bibliographically approved

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Blennow, Mattias

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