νs and nucleosynthesis from accretion disks

Malkus, Annelise; Kneller, James P.; McLaughlin, G. C.; Surman, Rebecca

doi:10.1063/1.4826787

Cited by 16 publications

(35 citation statements)

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“…It clearly shows that both Y e and hydrodynamic evolution have strong impact on the neutrino flavor conversion. In the case of "no feedback", nearly all the initial ν e are converted to ν s , due to the so-called "matter-neutrino resonance" (MNR) mechanism [29,30]. For the "feedback on Y e only" case, ν e are less converted to ν s but the flavor conversion process takes place up to a much larger radius.…”

Section: Epj Web Of Conferencesmentioning

confidence: 99%

Linking neutrino oscillations to the nucleosynthesis of elements

Martı́nez-Pinedo

Qian

2016

EPJ Web of Conferences

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Abstract. Neutrino interactions with matter play an important role in determining the nucleosynthesis outcome in explosive astrophysical environments such as core-collapse supernovae or mergers of compact objects. In this article, we first discuss our recent work on the importance of studying the time evolution of collective neutrino oscillations among active flavors in determining their effects on nucleosynthesis. We then consider the possible active-sterile neutrino mixing and demonstrate the need of a consistent approach to evolve neutrino flavor oscillations, matter composition, and the hydrodynamics when flavor oscillations can happen very deep inside the supernovae.

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Section: Epj Web Of Conferencesmentioning

confidence: 99%

Linking neutrino oscillations to the nucleosynthesis of elements

Martı́nez-Pinedo

Qian

2016

EPJ Web of Conferences

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“…The geometric contribution was derived in [18] for a disk in general. Since we are calculating trajectories like those in Fig.…”

Section: Calculationsmentioning

confidence: 99%

“…Unique to settings where the neutrino interaction potential and the matter potential have opposite sign, another oscillation phenomenon can be possible [18,19]. In [18] it was shown that collapsar-type disks may be home to MNRs and that the MNR may result in flavor transformation that alters nucleosynthesis.…”

Section: Introductionmentioning

confidence: 99%

“…The high neutrino density coupled with high matter density provide an environment where several kinds of oscillation may take place. Neutrinos emitted from mergers can undergo the same types of transformations that neutrinos from supernovae do [17], as well as oscillations not previously seen elsewhere (except for in collapsars [18]), called Matter-Neutrino Resonance (MNR) transitions [19]. The MNR takes place when the matter potential and the neutrino self interaction potential are the same size and have opposite signs.…”

Section: Introductionmentioning

confidence: 99%

“…In [18] it was shown that collapsar-type disks may be home to MNRs and that the MNR may result in flavor transformation that alters nucleosynthesis. The understanding of the MNR was expanded in [19], where the standard MNR was explored in detail.…”

Section: Introductionmentioning

confidence: 99%

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Symmetric and standard matter neutrino resonances above merging compact objects

2016

Self Cite

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Matter-neutrino resonances (MNR) can occur in environments where the flux of electron antineutrinos is greater than the flux of electron neutrinos. These resonances may result in dramatic neutrino flavor transformation. Compact object merger disks are an example of an environment where electron antineutrinos outnumber neutrinos. We study MNR resonances in several such disk configurations and find two qualitatively different types of matter-neutrino resonances: a standard MNR and a symmetric MNR. We examine the transformation that occurs in each type of resonance and explore the consequences for nucleosynthesis.

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Exact methods for self interacting neutrinos

Pehlivan

Balantekin

Kajino

2014

AIP Conference Proceedings

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Abstract. The effective many-body Hamiltonian which describes vacuum oscillations and self interactions of neutrinos in a two flavor mixing scheme under the single angle approximation has the same dynamical symmetries as the well known BCS pairing Hamiltonian. These dynamical symmetries manifest themselves in terms of a set of constants of motion and can be useful in formulating the collective oscillation modes in an intuitive way. In particular, we show that a neutrino spectral split can be simply viewed as an avoided level crossing between the eigenstates of a mean field Hamiltonian which includes a Lagrange multiplier in order to fix the value of an exact many-body constant of motion. We show that the same dynamical symmetries also exist in the three neutrino mixing scheme by explicitly writing down the corresponding constants of motion.Keywords: Collective neutrino oscillations, nonlinear effects in neutrino propagation, neutrinos in matter, constants of motion, integrability PACS: 14.60. Pq, 02.30.Ik Neutrinos are produced in copious amounts by various astrophysical sources. For example, a core collapse supernova releases %99 of the gravitational binding energy of the pre-supernova in the form of neutrinos [see Refs. 1-4, for review]. These neutrinos are excellent probes into the physics of the supernova and believed to play a role in the supernova dynamics as well as the subsequent r-process nucleosynthesis. Black hole accretion disks are also likely to be major sources of neutrinos [5,6]. In the Early Universe neutrinos were produced abundantly and influenced the Big Bang nucleosynthesis [see Refs. 7,8, for review].Determining the impact neutrinos requires a careful study of their energy distribution. Although the initial energy distribution can be given with a specific model, it is subsequently modified as the neutrinos undergo flavor evolution subject to the refractive effects of the background matter. The refraction of neutrinos due to the other particles in the background such as protons, neutrons and electrons, is proportional to the forward scattering amplitude since it is only in the forward direction that the scattering amplitudes add up coherently. This gives rise to the well known MSW effect in the Sun. But if the neutrino density is sufficiently high, then the self refraction of neutrinos can also make a significant contribution to the flavor evolution as is the case for the core collapse supernovae [9], the Early Universe [10] and in black hole accretion disks [11]. When neutrinos scatter off each other, those diagrams in which neutrinos completely exchange their momenta also add up coherently in addition to the forward scattering diagrams [12]. The exchange diagrams couple neutrinos with different energies and turn flavor evolution of the system into a nonlinear many-body phenomenon. A rich set of flavor oscillation modes arises due to this nonlinearity which is a subject of intense study in the recent years. In particular, collective flavor oscillation modes in which neutrinos of differen...

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νs and nucleosynthesis from accretion disks

Cited by 16 publications

References 0 publications

Linking neutrino oscillations to the nucleosynthesis of elements

Linking neutrino oscillations to the nucleosynthesis of elements

Symmetric and standard matter neutrino resonances above merging compact objects

Exact methods for self interacting neutrinos

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