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High Energy Physics - Phenomenology

arXiv:1503.03485 (hep-ph)
[Submitted on 11 Mar 2015 (v1), last revised 9 Jul 2015 (this version, v2)]

Title:Self-induced flavor instabilities of a dense neutrino stream in a two-dimensional model

Authors:Alessandro Mirizzi (Bari Univ. & INFN Bari, Italy & Hamburg Univ., Germany), Gianpiero Mangano (INFN, Naples, Italy), Ninetta Saviano (IPPP, Durham Univ., UK)
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Abstract:We consider a simplifed model for self-induced flavor conversions of a dense neutrino gas in two dimensions, showing new solutions that spontaneously break the spatial symmetries of the initial conditions. As a result of the symmetry breaking induced by the neutrino-neutrino interactions, the coherent behavior of the neutrino gas becomes unstable. This instability produces large spatial variations in the flavor content of the ensemble. Furthermore, it also leads to the creation of domains of different net lepton number flux. The transition of the neutrino gas from a coherent to incoherent behavior shows an intriguing analogy with a streaming flow changing from laminar to turbulent regime. These finding would be relevant for the self-induced conversions of neutrinos streaming-off a supernova core.
Comments: (v2: revised version: 8 pages, 7 eps figures. To appear on Physical Review D as Rapid Communication. Discussion enlarged. Two Appendices added.)
Subjects: High Energy Physics - Phenomenology (hep-ph); Solar and Stellar Astrophysics (astro-ph.SR)
Report number: IPPP/15/08; DCPT/15/16
Cite as: arXiv:1503.03485 [hep-ph]
  (or arXiv:1503.03485v2 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1503.03485
Journal reference: Phys. Rev. D 92, 021702 (2015)
Related DOI: https://doi.org/10.1103/PhysRevD.92.021702

Submission history

From: Alessandro Mirizzi [view email]
[v1] Wed, 11 Mar 2015 20:00:13 UTC (846 KB)
[v2] Thu, 9 Jul 2015 18:12:03 UTC (1,035 KB)
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