Self-Refraction of Supernova Neutrinos: Mixed Spectra and Three-Flavor Instabilities

Friedland, Alexander

doi:10.1103/physrevlett.104.191102

Cited by 91 publications

(84 citation statements)

References 56 publications

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“…In SN models, the influence of flavor transformations on the flux of electron neutrinos is more significant than that on the flux of electron antineutrinos [29]. But in vacuum, this influence on the flux of electron neutrinos is similar to that on electron antineutrinos.…”

Section: Conclusion and Discussionmentioning

confidence: 86%

Detectable MeV neutrinos from black hole neutrino-dominated accretion flows

Liu

Zhang

et al. 2016

Phys. Rev. D

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Neutrino-dominated accretion flows (NDAFs) around rotating stellar-mass black holes (BHs) have been theorized as the central engine of relativistic jets launched in massive star core collapse events or compact star mergers. In this work, we calculate the electron neutrino/anti-neutrino spectra of NDAFs by fully taking into account the general relativistic effects, and investigate the effects of viewing angle, BH spin, and mass accretion rate on the results. We show that even though a typical NDAF has a neutrino luminosity lower than that of a typical supernova (SN), it can reach 10 50 − 10 51 erg s −1 peaking at ∼ 10 MeV, making them potentially detectable with the upcoming sensitive MeV neutrino detectors if they are close enough to Earth. Based on the observed GRB event rate in the local universe and requiring that at least 3 neutrinos are detected to claim a detection, we estimate a detection rate up to ∼ (0.10-0.25) per century for GRB-related NDAFs by the Hyper-Kamiokande (Hyper-K) detector if one neglects neutrino oscillation. If one assumes that all Type Ib/c SNe have an engine-driven NDAF, the Hyper-K detection rate would be ∼ (1-3) per century. By considering neutrino oscillations, the detection rate may decrease by a factor of 2-3. Detecting one such event would establish the observational evidence of NDAFs in the universe.PACS numbers: 95.85. Ry, 97.10.Gz, 97.60.Lf, 98.70.Rz

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Section: Conclusion and Discussionmentioning

confidence: 86%

Detectable MeV neutrinos from black hole neutrino-dominated accretion flows

Liu

Zhang

et al. 2016

Phys. Rev. D

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“…Their development depends on the neutrino mass hierarchy as well as on the ordering of the flavor fluxes at the source. Therefore, the split features can depend on time in interesting ways [117][118][119][120][121].…”

Section: Particle Physics and Neutrino Propertiesmentioning

confidence: 99%

The next-generation liquid-scintillator neutrino observatory LENA

Wurm

Beacom

Bezrukov

et al. 2012

Astroparticle Physics

211

200

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2As part of the European LAGUNA design study on a next-generation neutrino detector, we propose the liquid-scintillator detector LENA (Low Energy Neutrino Astronomy) as a multipurpose neutrino observatory. The outstanding successes of the Borexino and KamLAND experiments demonstrate the large potential of liquid-scintillator detectors in low-energy neutrino physics. Low energy threshold, good energy resolution and efficient background discrimination are inherent to the liquidscintillator technique. A target mass of 50 kt will offer a substantial increase in detection sensitivity.At low energies, the variety of detection channels available in liquid scintillator will allow for an energy-and flavor-resolved analysis of the neutrino burst emitted by a galactic Supernova. Due to target mass and background conditions, LENA will also be sensitive to the faint signal of the Diffuse Supernova Neutrino Background. Solar metallicity, time-variation in the solar neutrino flux and deviations from MSW-LMA survival probabilities can be investigated based on unprecedented statistics. Low background conditions allow to search for dark matter by observing rare annihilation neutrinos. The large number of events expected for geoneutrinos will give valuable information on the abundances of Uranium and Thorium and their relative ratio in the Earth's crust and mantle. Reactor neutrinos enable a high-precision measurement of solar mixing parameters. A strong radioactive or pion decay-at-rest neutrino source can be placed close to the detector to investigate neutrino oscillations for short distances and sub-MeV to MeV energies.At high energies, LENA will provide a new lifetime limit for the SUSY-favored proton decay mode into kaon and antineutrino, surpassing current experimental limits by about one order of magnitude. Recent studies have demonstrated that a reconstruction of momentum and energy of GeV particles is well feasible in liquid scintillator. Monte Carlo studies on the reconstruction of the complex event topologies found for neutrino interactions at multi-GeV energies have shown promising results. If this is confirmed, LENA might serve as far detector in a long-baseline neutrino oscillation experiment currently investigated in LAGUNA-LBNO.3

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“…This came as a very welcome development for the field, as single-angle calculations allow one to quickly explore various regimes of collective oscillations. In recent years, this framework has been used to uncover more rich physics, for example, the interplay of collective oscillations with the usual MSW effect [17,18], the possibility of multiple spectral splits [19], the appearance of the "mixed" spectra and three-flavor instabilities [20,21] and other effects (see, e.g., [22] for a review). With so much staked on the validity of the single-angle approximation, it is of great interest to establish any limitations it might have, and physical reasons for them.…”

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confidence: 99%

Self-Induced Suppression of Collective Neutrino Oscillations in a Supernova

2011

Self Cite

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We investigate collective flavor oscillations of supernova neutrinos at late stages of the explosion. We first show that the frequently used single-angle (averaged coupling) approximation predicts oscillations close to, or perhaps even inside, the neutrinosphere, potentially invalidating the basic neutrino transport paradigm. Fortunately, we also find that the single-angle approximation breaks down in this regime; in the full multiangle calculation, the oscillations start safely outside the transport region. The new suppression effect is traced to the interplay between the dispersion in the neutrino-neutrino interactions and the vacuum oscillation term.

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Self-Refraction of Supernova Neutrinos: Mixed Spectra and Three-Flavor Instabilities

Cited by 91 publications

References 56 publications

Detectable MeV neutrinos from black hole neutrino-dominated accretion flows

Detectable MeV neutrinos from black hole neutrino-dominated accretion flows

The next-generation liquid-scintillator neutrino observatory LENA

Self-Induced Suppression of Collective Neutrino Oscillations in a Supernova

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