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Related papers: Fast Neutrino-Flavor Conversion with Attenuation a…

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We explore the impact of small-scale flavor conversions of neutrinos, the so-called fast flavor conversions (FFCs), on the dynamical evolution and neutrino emission of core-collapse supernovae (CCSNe). In order to do that, we implement FFCs…

High Energy Astrophysical Phenomena · Physics 2023-05-31 Jakob Ehring , Sajad Abbar , Hans-Thomas Janka , Georg Raffelt , Irene Tamborra

We assert that non-linear features of fast neutrino-flavor conversion (FFC) can be qualitatively different between core-collapse supernovae (CCSNe) and binary neutron star mergers (BNSMs). This argument arises from recent global FFC…

High Energy Astrophysical Phenomena · Physics 2025-05-22 Masamichi Zaizen , Hiroki Nagakura

Neutrino-neutrino forward scatterings potentially induce collective neutrino oscillation in dense neutrino gases in astrophysical sites such as core-collapse supernovae (CCSN) and binary neutron star mergers (BNSM). In this paper, we…

High Energy Astrophysical Phenomena · Physics 2023-05-24 Masamichi Zaizen , Hiroki Nagakura

Binary neutron star merger (BNSM) offers an environment where fast neutrino-flavor conversion (FFC) can vividly occur, that potentially leads to a considerable change of neutrino radiation field. In this Letter, we investigate global…

High Energy Astrophysical Phenomena · Physics 2023-10-19 Hiroki Nagakura

Fast flavor conversions (FFCs) of neutrinos, which can occur in core-collapse supernovae (CCSNe), are multiangle effects. They depend on the angular distribution of the neutrino's electron lepton number (ELN). In this work, we present a…

High Energy Astrophysical Phenomena · Physics 2025-04-22 Zewei Xiong , Meng-Ru Wu , Manu George , Chun-Yu Lin , Noshad Khosravi Largani , Tobias Fischer , Gabriel Martínez-Pinedo

We present the first simulations of core-collapse supernovae in axial symmetry with feedback from fast neutrino flavor conversion (FFC). Our schematic treatment of FFCs assumes instantaneous flavor equilibration under the constraint of…

High Energy Astrophysical Phenomena · Physics 2025-01-03 Jakob Ehring , Sajad Abbar , Hans-Thomas Janka , Georg Raffelt , Irene Tamborra

A new chapter is opening in the theory of core-collapse supernovae and neutron star mergers as simulations of these events begin to incorporate fast flavor conversion (FFC) and other forms of neutrino flavor mixing. Using numerical…

High Energy Astrophysical Phenomena · Physics 2026-05-14 Erick Urquilla , Lucas Johns

We present a systematic study of fast neutrino-flavor conversion (FFC) with both small-scale and large-scale numerical simulations in spherical symmetry. We find that FFCs can, in general, reach a quasi-steady state, and these features in…

High Energy Astrophysical Phenomena · Physics 2023-04-12 Hiroki Nagakura , Masamichi Zaizen

In this work, we explore in a consistent fashion the effects of fast flavor conversion (FFC) in 1D and 2D core-collapse supernova (CCSN) simulations. In addition, we investigate the impact of various angular reconstruction methods and…

High Energy Astrophysical Phenomena · Physics 2025-11-27 Tianshu Wang , Adam Burrows

One of the greatest uncertainties in any modeling of inner engine of core-collapse supernova (CCSN) is neutrino flavor conversions driven by neutrino self-interactions. We carry out large-scale numerical simulations of multi-energy,…

High Energy Astrophysical Phenomena · Physics 2023-06-07 Hiroki Nagakura

Despite the theoretical indication that fast neutrino-flavor conversion (FFC) ubiquitously occurs in core-collapse supernova and binary neutron star merger, the lack of global simulations has been the greatest obstacle to study their…

High Energy Astrophysical Phenomena · Physics 2022-12-28 Hiroki Nagakura , Masamichi Zaizen

The quantum kinetic evolution of neutrinos in dense environments, such as the core-collapse supernovae or the neutron star mergers, can result in fast flavor conversion (FFC), presenting a significant challenge to achieving robust…

High Energy Astrophysical Phenomena · Physics 2025-02-10 Zewei Xiong , Meng-Ru Wu , Manu George , Chun-Yu Lin

In astrophysical environments such as core-collapse supernovae (CCSNe) and binary neutron star mergers (BNSMs), neutrinos potentially experience substantial flavor mixing due to the refractive effects of neutrino self-interactions.…

High Energy Astrophysical Phenomena · Physics 2025-02-25 Jiabao Liu , Hiroki Nagakura , Masamichi Zaizen , Lucas Johns , Ryuichiro Akaho , Shoichi Yamada

We investigated the impact of a spatially varying matter potential $\lambda$, coming from neutrino-electron forward scattering, on the emergence of fast neutrino flavor conversion (FFC) triggered by the presence of zero crossings in the…

High Energy Astrophysical Phenomena · Physics 2025-04-16 Soumya Bhattacharyya , Meng-Ru Wu , Zewei Xiong

Mounting evidence indicates that neutrinos likely undergo fast flavor conversion (FFC) in at least some core-collapse supernovae. Outcomes of FFC, however, remain highly uncertain. Here we study the cascade of flavor-field power from large…

High Energy Physics - Phenomenology · Physics 2020-11-25 Lucas Johns , Hiroki Nagakura , George M. Fuller , Adam Burrows

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

Quantum kinetics of neutrinos are known to potentially change the classical neutrino radiation field in high-energy astrophysical sources such as core-collapse supernovae and binary neutron-star mergers. However, the mixing phenomena still…

High Energy Physics - Phenomenology · Physics 2025-05-22 Masamichi Zaizen

Fast neutrino flavor conversions (FFCs) and collisional flavor instabilities (CFIs) potentially affect the dynamics of core-collapse supernovae (CCSNe) and binary neutron star mergers (BNSMs). Under the assumption of homogeneous neutrinos,…

High Energy Astrophysical Phenomena · Physics 2023-07-19 Chinami Kato , Hiroki Nagakura , Masamichi Zaizen

Neutrinos experience collective flavor conversion in extreme astrophysical environments such as core-collapse supernovae (CCSNe). One manifestation of collective conversion is slow flavor conversion (SFC), which has recently attracted…

High Energy Astrophysical Phenomena · Physics 2025-09-03 Ian Padilla-Gay , Heng-Hao Chen , Sajad Abbar , Meng-Ru Wu , Zewei Xiong

One of the active debates in core-collapse supernova (CCSN) theory is how significantly neutrino flavor conversions induced by neutrino-neutrino self-interactions change the conventional picture of CCSN dynamics. Recent studies have…

High Energy Astrophysical Phenomena · Physics 2023-11-16 Hiroki Nagakura , Masamichi Zaizen
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