Pairing instabilities in neutrino plasmas arise only with occupation number discontinuities and are spurious artifacts of energy discretization that disappear in the continuum.
Flavomon ray tracing in matter gradients
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abstract
Flavor instabilities develop in neutrino plasmas through emission of flavomons, the quanta of flavor waves. We derive the flavomon equations of motion in slowly varying environments, notably the matter gradients of supernovae, and use them to construct a flavomon ray tracing framework. Combined with a quasi-linear description of flavomon growth, we thus develop a new approach to the global evolution of flavor instabilities. As a first application, we show that the growth of neutrino-mass-induced instabilities is slowed down, but not suppressed, by the inevitable matter gradients. Local stability analysis alone cannot gauge the impact of inhomogeneities and instead must be coupled to flavomon ray tracing.
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hep-ph 2years
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In anisotropic neutrino gases, νν-bar pairing instabilities emerge when the excessive pair-occupation number distribution changes sign, producing pair conversions at growth rates comparable to fast flavor instabilities.
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Neutrino-antineutrino superfluidity
Pairing instabilities in neutrino plasmas arise only with occupation number discontinuities and are spurious artifacts of energy discretization that disappear in the continuum.
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Collective neutrino-antineutrino pair oscillations
In anisotropic neutrino gases, νν-bar pairing instabilities emerge when the excessive pair-occupation number distribution changes sign, producing pair conversions at growth rates comparable to fast flavor instabilities.