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Neutrinos and antineutrinos emitted from a core collapse supernova interact among themselves, giving rise to collective flavor conversion effects that are significant near the neutrinosphere. We develop a formalism to analyze these…

High Energy Physics - Phenomenology · Physics 2010-01-21 Basudeb Dasgupta , Amol Dighe

Neutrino flavor evolution in core-collapse supernovae, neutron-star mergers, or the early universe is dominated by neutrino-neutrino refraction, often spawning "self-induced flavor conversion", i.e., shuffling of flavor among momentum…

High Energy Physics - Phenomenology · Physics 2016-06-22 Sovan Chakraborty , Rasmus Sloth Hansen , Ignacio Izaguirre , Georg Raffelt

We review the rich phenomena associated with neutrino flavor transformation in the presence of neutrino self-coupling. Our exposition centers on three collective neutrino oscillation scenarios: a simple bipolar neutrino system that…

High Energy Physics - Phenomenology · Physics 2011-02-02 Huaiyu Duan , George M. Fuller , Yong-Zhong Qian

We discuss the relationship between a symmetry in the neutrino flavour evolution equations and neutrino flavour oscillations in the collective precession mode. This collective precession mode can give rise to spectral swaps (splits) when…

Astrophysics · Physics 2009-08-25 Huaiyu Duan , George M. Fuller , Yong-Zhong Qian

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

We calculate coherent neutrino and antineutrino flavor transformation in the supernova environment, for the first time including a self-consistent treatment of forward scattering-induced coupling and entanglement of intersecting…

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

We give a very brief overview of collective effects in neutrino oscillations in core collapse supernovae where refractive effects of neutrinos on themselves can considerably modify flavor oscillations, with possible repercussions for future…

High Energy Physics - Phenomenology · Physics 2009-09-11 Guenter Sigl , Ricard Tomas , Andreu Esteban-Pretel , Sergio Pastor , Alessandro Mirizzi , Georg G. Raffelt , Pasquale D. Serpico

We present results of large-scale numerical simulations of the evolution of neutrino and antineutrino flavors in the region above the late-time post-supernova-explosion proto-neutron star. Our calculations are the first to allow explicit…

Astrophysics · Physics 2007-05-23 Huaiyu Duan , George M. Fuller , J Carlson , Yong-Zhong Qian

We can understand many recently-discovered features of flavor evolution in dense, self-coupled supernova neutrino and antineutrino systems with a simple, physical scheme consisting of two quasi-static solutions. One solution closely…

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

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

Neutrinos emitted deep within a supernova explosion experience a self-induced index of refraction. In the stationary, one-dimensional (1D) supernova "bulb model", this self-induced refraction can lead to a collective flavor transformation…

High Energy Physics - Phenomenology · Physics 2020-01-17 Joshua D. Martin , J. Carlson , Huaiyu Duan

Neutrino-neutrino interactions can lead to collective flavour conversion effects in supernovae and in the early universe. We demonstrate that the case of "bipolar" oscillations, where a dense gas of neutrinos and antineutrinos in equal…

Astrophysics · Physics 2014-10-13 S. Hannestad , G. G. Raffelt , G. Sigl , Y. Y. Y. Wong

Neutrino-neutrino refraction dominates the flavor evolution in core-collapse supernovae, neutron-star mergers, and the early universe. Ordinary neutrino flavor conversion develops on timescales determined by the vacuum oscillation…

High Energy Astrophysical Phenomena · Physics 2021-09-28 Irene Tamborra , Shashank Shalgar

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

We explore the effects of collective neutrino flavor oscillations due to neutrino-neutrino interactions on the neutrino heating behind a stalled core-collapse supernova shock. We carry out axisymmetric (2D) radiation-hydrodynamic…

Solar and Stellar Astrophysics · Physics 2014-03-06 Basudeb Dasgupta , Evan P. O'Connor , Christian D. Ott

Dense clouds of neutrinos and antineutrinos can exhibit fast collective flavor oscillations. Previously, in Phys. Rev. Lett. 126 (2021) 061302, we proposed that such flavor oscillations lead to depolarization, i.e., an irreversible mixing…

High Energy Physics - Phenomenology · Physics 2022-12-29 Soumya Bhattacharyya , Basudeb Dasgupta

Non-linear effects on supernova neutrino oscillations, associated with neutrino self-interactions, are known to induce collective flavor transitions near the supernova core for theta_13 \neq 0. In scenarios with very shallow electron…

High Energy Physics - Phenomenology · Physics 2009-10-07 G. L. Fogli , E. Lisi , A. Marrone , A. Mirizzi

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

The large neutrino density in the deep interior of core-collapse supernovae and compact binary merger remnants makes neutrino flavor evolution non-linear because of the coherent forward scattering of neutrinos among themselves. Under the…

High Energy Astrophysical Phenomena · Physics 2023-08-16 Shashank Shalgar , Irene Tamborra

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
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