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Fast flavor conversions of supernova neutrinos, possible near the neutrinosphere, depends on an interesting interplay of collisions and neutrino oscillations. Contrary to naive expectations, the rate of self-induced neutrino oscillations,…

High Energy Physics - Phenomenology · Physics 2019-03-13 Francesco Capozzi , Basudeb Dasgupta , Alessandro Mirizzi , Manibrata Sen , Günter Sigl

The flavor transformation in a dense neutrino gas can have a significant impact on the physical and chemical evolution of its surroundings. In this work we demonstrate that a dynamic, fast flavor oscillation wave can develop spontaneously…

High Energy Physics - Phenomenology · Physics 2019-11-19 Joshua D. Martin , Changhao Yi , Huaiyu Duan

A dense neutrino medium can support flavor oscillation waves which are coherent among different momentum modes of the neutrinos. The dispersion relation (DR) branches of such a wave with complex frequencies and/or wave numbers can lead to…

High Energy Physics - Phenomenology · Physics 2019-03-13 Changhao Yi , Lei Ma , Joshua D. Martin , Huaiyu Duan

We all know that in the dense anisotropic interior of the star, neutrino-neutrino forward-scattering can lead to fast collective neutrino oscillations, which has striking consequences on flavor dependent neutrino emission and can be crucial…

High Energy Physics - Phenomenology · Physics 2021-01-06 Soumya Bhattacharyya

In the early Universe, as well as in supernovae and merging neutron stars, neutrinos have such high densities that they affect each other and exhibit collective flavor oscillations. A crucial ingredient for fast collective flavor…

High Energy Physics - Phenomenology · Physics 2022-12-06 Soumya Bhattacharyya , Basudeb Dasgupta

Dense neutrino media in core-collapse supernovae and neutron star mergers can experience collective flavor transformations in the form of neutrino oscillation waves. It was recently reported that the stable fast modes of collective…

High Energy Physics - Phenomenology · Physics 2026-03-24 Anson Kost , Huaiyu Duan

We investigate the collective neutrino oscillations under the three flavor multi-angle approximation in a spherically symmetric simulation of failed supernovae. A failed supernova emits high neutrino fluxes in a short time, while intense…

High Energy Astrophysical Phenomena · Physics 2018-12-19 Masamichi Zaizen , Takashi Yoshida , Kohsuke Sumiyoshi , Hideyuki Umeda

In dense neutrino backgrounds present in supernovae and in the early Universe, neutrino oscillations may exhibit complex collective phenomena, such as synchronized oscillations, bipolar oscillations and spectral splits and swaps. In this…

High Energy Physics - Phenomenology · Physics 2017-03-02 Evgeny Akhmedov , Joachim Kopp , Manfred Lindner

In a 1996 JRO Fellowship Research Proposal (Los Alamos), the author suggested that neutrino oscillations may provide a powerful indirect energy transport mechanism to supernovae explosions. The principal aim of this addendum is to present…

Astrophysics · Physics 2008-11-26 D. V. Ahluwalia-Khalilova

Accurate neutrino transport is crucial for reliably modeling explosive astrophysical events like core-collapse supernovae (CCSNe) and neutron star mergers (NSMs). However, in these extremely neutrino-dense systems, flavor oscillations…

High Energy Astrophysical Phenomena · Physics 2025-08-29 Lucas Johns , Sherwood Richers , Meng-Ru Wu

Space-time localization diagrams ``unlock" subtle aspects of $\nu$ oscillations such as coherence and entanglement. Observability of propagation decoherence in oscillating neutrino state is discussed. The sizes of WPs of reactor and source…

High Energy Physics - Phenomenology · Physics 2022-12-21 Alexei Y Smirnov

In a recent article (arxiv:1803.06332) we noticed that the electron density in condensed matter exhibits large spikes close to the atomic nuclei. We showed that these spikes in the electron densities, 3-4 orders of magnitude larger than…

High Energy Physics - Phenomenology · Physics 2019-09-25 Adam Zettel , Mihai Horoi

We study spin and flavor oscillations of astrophysical neutrinos under the influence of external fields in curved spacetime. First, we consider spin oscillations in case of neutrinos gravitationally scattered off a rotating supermassive…

High Energy Physics - Phenomenology · Physics 2023-06-01 Maxim Dvornikov

A proposal for the neutrino mass, based on neutrino-scalar field interaction, is introduced. The scalar field is also non-minimally coupled to the Ricci scalar and hence relates the neutrino mass to the matter density. In a dense region,…

High Energy Physics - Phenomenology · Physics 2018-04-17 H. Mohseni Sadjadi , A. P. Khosravi Karchi

The flavor evolution of neutrinos in dense astrophysical sources, such as core-collapse supernovae or compact binary mergers, is non-linear due to the coherent forward scattering of neutrinos among themselves. Recent work in this context…

High Energy Astrophysical Phenomena · Physics 2024-02-23 Marie Cornelius , Shashank Shalgar , Irene Tamborra

In neutrino-dense astrophysical environments, these particles exchange flavor through a coherent weak field, forming a collisionless neutrino plasma with collective flavor dynamics. Instabilities, which grow and affect the environment, may…

High Energy Physics - Phenomenology · Physics 2026-03-31 Damiano F. G. Fiorillo , Georg G. Raffelt

The neutrino oscillation patterns can be modified by neutrino interactions with external environments including electromagnetic fields that can influence on neutrinos in the case neutrinos have nonzero electromagnetic properties [1]. The…

High Energy Physics - Phenomenology · Physics 2020-01-01 Konstantin Stankevich , Alexander Studenikin

A dense neutrino medium such as that inside a core-collapse supernova can experience collective flavor conversion or oscillations because of the neutral-current weak interaction among the neutrinos. This phenomenon has been studied in a…

High Energy Astrophysical Phenomena · Physics 2015-10-20 Sajad Abbar , Huaiyu Duan

Neutrino oscillations in a hot and dense astrophysical environment such as a core-collapse supernova pose a challenging, seven-dimensional flavor transport problem. To make the problem even more difficult (and interesting), neutrinos can…

High Energy Physics - Phenomenology · Physics 2015-09-11 Huaiyu Duan

A number of derivations of the standard neutrino oscillation formula are known, each one providing its own unique insights. Common to all treatments is the assumption that neutrinos propagate freely between source and detector, as indeed…

High Energy Physics - Phenomenology · Physics 2019-10-08 Lucas Johns
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