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In the early Universe, or near a supernova core, neutrino flavor evolution may be affected by coherent neutrino-neutrino scattering. We develop a microscopic picture of this phenomenon. We show that coherent scattering does not lead to the…

High Energy Physics - Phenomenology · Physics 2009-11-10 Alexander Friedland , Cecilia Lunardini

The supernova neutrino flavor evolution in the presence of the non-trivial neutrino magnetic moment and strong magnetic field is numerically derived using the two-flavor and single-angle approximation. The novel properties of collective…

High Energy Physics - Phenomenology · Physics 2021-05-18 Ziyi Yuan , Yu-Feng Li , Xiang Zhou

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 this paper we study the dynamics of flavor transformation for neutrinos propagating in the very dense environment of astrophysical compact objects as Type II supernova in post collapse phase and proto-neutron stars. The analysis is based…

High Energy Astrophysical Phenomena · Physics 2012-04-23 Marcello Baldo , Vincenzo Palmisano

We follow the longterm evolution of the dynamic ejecta of neutron star mergers for up to 100 years and over a density range of roughly 40 orders of magnitude. We include the nuclear energy input from the freshly synthesized, radioactively…

High Energy Astrophysical Phenomena · Physics 2014-02-05 S. Rosswog , O. Korobkin , A. Arcones , F. -K. Thielemann , T. Piran

We present a comprehensive nucleosynthesis study of the neutrino-driven wind in the aftermath of a binary neutron star merger. Our focus is the initial remnant phase when a massive central neutron star is present. Using tracers from a…

Solar and Stellar Astrophysics · Physics 2015-10-23 Dirk Martin , Albino Perego , Almudena Arcones , Friedrich-Karl Thielemann , Oleg Korobkin , Stephan Rosswog

In astrophysical environments such as core-collapse supernovae and neutron star-neutron star or neutron star-black hole mergers where dense neutrino media are present, matter-neutrino resonances (MNRs) can occur when the neutrino…

High Energy Physics - Phenomenology · Physics 2015-11-24 Meng-Ru Wu , Huaiyu Duan , Yong-Zhong Qian

Matter Neutrino Resonances (MNRs) can drastically modify neutrino flavor evolution in astrophysical environments and may significantly impact nucleosynthesis. Here we further investigate the underlying physics of MNR type flavor…

High Energy Physics - Phenomenology · Physics 2016-06-01 D. Vaananen , G. C. McLaughlin

Our understanding of neutrino flavor conversion in the innermost regions of core-collapse supernovae and neutron star mergers is mostly limited to spherically symmetric configurations that facilitate the numerical solution of the quantum…

High Energy Astrophysical Phenomena · Physics 2024-11-28 Marie Cornelius , Shashank Shalgar , Irene Tamborra

We present results of 3-neutrino flavor evolution simulations for the neutronization burst from an O-Ne-Mg core-collapse supernova. We find that nonlinear neutrino self-coupling engineers a single spectral feature of stepwise conversion in…

Astrophysics · Physics 2008-11-26 Huaiyu Duan , George M. Fuller , J. Carlson , Yong-Zhong Qian

Neutrinos can rapidly change flavor in the inner dense regions of core-collapse supernovae and neutron star mergers due to the neutrino fast flavor instability. If the amount of flavor transformation is significant, the FFI could…

High Energy Astrophysical Phenomena · Physics 2024-09-13 Sherwood Richers

We explore the impact of nonstandard interactions on neutrino propagation in accretion disks around binary neutron star mergers remnants. We show flavor evolution can be significantly modified even for values of the nonstandard couplings…

High Energy Physics - Phenomenology · Physics 2018-02-14 Amélie Chatelain , Maria Cristina Volpe

Neutrino gases are expected to form in high density astrophysical environments, and accurately modeling their flavor evolution is critical to understanding such environments. In this work we study a simplified model of such a dense neutrino…

High Energy Physics - Phenomenology · Physics 2024-01-09 Joshua D. Martin , Duff Neill , A. Roggero , Huaiyu Duan , J. Carlson

The remnant black hole-accretion disk system resulting from binary neutron star mergers has proven to be a promising site for synthesizing the heaviest elements via rapid neutron capture (r-process). A critical factor in determining the…

High Energy Astrophysical Phenomena · Physics 2025-05-29 Kelsey A. Lund , Payel Mukhopadhyay , Jonah M. Miller , G. C. McLaughlin

High energy cosmic neutrino fluxes can be produced inside relativistic jets under the envelopes of collapsing stars. In the energy range E ~ (0.3 - 1e5) GeV, flavor conversion of these neutrinos is modified by various matter effects inside…

High Energy Physics - Phenomenology · Physics 2014-11-20 Soebur Razzaque , A. Yu. Smirnov

We argue that the small fraction of neutrinos that undergo direction-changing scattering outside of the neutrinosphere could have significant influence on neutrino flavor transformation in core-collapse supernova environments. We show that…

High Energy Physics - Phenomenology · Physics 2012-07-31 John F. Cherry , J. Carlson , Alexander Friedland , George M. Fuller , Alexey Vlasenko

A compact accretion disk may be formed in the merger of two neutron stars or of a neutron star and a stellar-mass black hole. Outflows from such accretion disks have been identified as a major site of rapid neutron-capture (r-process)…

High Energy Astrophysical Phenomena · Physics 2021-06-30 Xinyu Li , Daniel M. Siegel

We study the flavor evolution of a dense gas initially consisting of pure mono-energetic $\nu_e$ and $\bar\nu_e$. Using adiabatic invariants and the special symmetry in such a system we are able to calculate the flavor evolution of the…

Astrophysics · Physics 2008-11-26 Huaiyu Duan , George M. Fuller , J. Carlson , Yong-Zhong Qian

The impact of neutrino flavor conversion on the supernova mechanism is yet to be fully understood. We present multi-energy and multi-angle solutions of the neutrino quantum kinetic equations in three flavors, without employing any…

High Energy Astrophysical Phenomena · Physics 2025-12-15 Shashank Shalgar , Irene Tamborra

Neutrinos produced in the atmosphere traverse a column density of air before being detected at neutrino observatories like IceCube or KM3NeT. In this work, we extend the neutrino flavor evolution in the {nuSQuIDS} code accounting for the…

High Energy Physics - Phenomenology · Physics 2024-05-21 Connor Sponsler , Matheus Hostert , Ivan Martinez-Soler , Carlos A. Argüelles