Neutrino Oscillations in Neutrino-Dominated Accretion Around Rotating Black Holes

Uribe, Juan D.; Becerra-Vergara, E. A.; Rueda, J. A.

doi:10.3390/universe7010007

Cited by 5 publications

(7 citation statements)

References 171 publications

(245 reference statements)

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“…As we shall show below, the high density of neutrinos and matter on top of the surface of the accreting NS leads to flavor oscillations and new neutrino physics in these sources. We refer the reader to [65][66][67] for further details.…”

Section: Mev Neutrinos From Bdhn Imentioning

confidence: 99%

“…Our purpose now is to introduce the dynamics of neutrino oscillations in such accretion disks. We adopt the simple yet robust neutrinocooled accretion disk (NCAD) model [67,[84][85][86][87][88][89][90]. NCADs can reach densities as high as ∼10 10 -10 13 g cm −3 and temperatures as high as ∼10 10 -10 11 K around the inner disk radius.…”

Section: Neutrino Emission From the Accretion Disk Around The Newborn Bhmentioning

confidence: 99%

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MeV, GeV and TeV Neutrinos from Binary-Driven Hypernovae

et al. 2023

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We analyze neutrino emission channels in energetic (≳1052 erg) long gamma-ray bursts within the binary-driven hypernova model. The binary-driven hypernova progenitor is a binary system composed of a carbon-oxygen star and a neutron star (NS) companion. The gravitational collapse leads to a type Ic supernova (SN) explosion and triggers an accretion process onto the NS. For orbital periods of a few minutes, the NS reaches the critical mass and forms a black hole (BH). Two physical situations produce MeV neutrinos. First, during the accretion, the NS surface emits neutrino–antineutrino pairs by thermal production. We calculate the properties of such a neutrino emission, including flavor evolution. Second, if the angular momentum of the SN ejecta is high enough, an accretion disk might form around the BH. The disk’s high density and temperature are ideal for MeV-neutrino production. We estimate the flavor evolution of electron and non-electron neutrinos and find that neutrino oscillation inside the disk leads to flavor equipartition. This effect reduces (compared to assuming frozen flavor content) the energy deposition rate of neutrino–antineutrino annihilation into electron–positron (e+e−) pairs in the BH vicinity. We then analyze the production of GeV-TeV neutrinos around the newborn black hole. The magnetic field surrounding the BH interacts with the BH gravitomagnetic field producing an electric field that leads to spontaneous e+e− pairs by vacuum breakdown. The e+e− plasma self-accelerates due to its internal pressure and engulfs protons during the expansion. The hadronic interaction of the protons in the expanding plasma with the ambient protons leads to neutrino emission via the decay chain of π-meson and μ-lepton, around and far from the black hole, along different directions. These neutrinos have energies in the GeV-TeV regime, and we calculate their spectrum and luminosity. We also outline the detection probability by some current and future neutrino detectors.

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Section: Mev Neutrinos From Bdhn Imentioning

confidence: 99%

Section: Neutrino Emission From the Accretion Disk Around The Newborn Bhmentioning

confidence: 99%

MeV, GeV and TeV Neutrinos from Binary-Driven Hypernovae

et al. 2023

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“…We study the effects of the rotation of a gravitational source on neutrino oscillations in regions of weak gravity to see a possible deviation in the oscillation probabilities, which may significantly change previously reported results of gravitational lensing of neutrinos in the Schwarzschild spacetime. Although neutrino oscillations in the rotating spacetime have not yet been fully explored, some limited theoretical studies of neutrino oscillations have been done in [42][43][44] for the Kerr-Neumann and Kerr spacetime. In [42], the change in the neutrino phase along the neutrino trajectories is explicitly calculated and discussed for the three following cases:…”

Section: Introductionmentioning

confidence: 99%

“…In [43], the phase change of the neutrino in the Kerr-Neumann background is calculated in the constant θ plane for the neutrino that has zeroangular momentum (L = 0) and is propagating in the radial direction. In [44] neutrino flavor oscillation inside a neutrinodominated disk around a rotating black hole is studied, and its consequences are analyzed. We know that the Kerr spacetime is an exact solution of the Einstein fields equation for a stationary rotating black hole with an axial symmetry around the axis of rotation.…”

Section: Introductionmentioning

confidence: 99%

Neutrino flavor oscillations in a rotating spacetime

Swami

2022

Eur. Phys. J. C

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We study neutrino oscillations in a rotating spacetime under the weak gravity limit for the trajectories of neutrinos which are constrained in the equatorial plane. Using the asymptotic form of the Kerr metric, we show that the rotation of the gravitational source non-trivially modifies the neutrino phase. We find that the oscillation probabilities deviate significantly from the corresponding results in the Schwarzschild spacetime when neutrinos are produced near the black hole (still in the weak-gravity limit) with non-zero angular momentum and detected on the same side, i.e., the non-lensed neutrino. Moreover, for a given gravitational body and geometric parameters, there exists a distance scale for every energy scale (and vice versa), after which the rotational contribution in the neutrino phase becomes significant. Using the sun-sized gravitational body in the numerical analysis of the one-sided neutrino propagation, we show that even a small rotation of the gravitational object can significantly change the survival or appearance events of a neutrino flavor registered by the detector, which is located on the earth. These effects are expected to be prominent for cosmological/astrophysical scenarios where neutrinos travel past by many (rotating) gravitational bodies and for large distances. Thus rotational effects of all such bodies must be incorporated in analyzing oscillations data.

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“…They find notable isospin effects, especially in net-charge fluctuations. J. D. Uribe et al [25] investigate the phenomenon of neutrino flavor oscillations in a novel astrophysical context, i.e., the neutrino-dominated accretion process around Kerr black holes. Such elusive particles are also the protagonists of the paper by A. Capolupo and colleagues [26], who propose new approaches to distinguish between Dirac and Majorana neutrinos.…”

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confidence: 99%