Neutrino spin oscillations in conformally gravity coupling models and quintessence surrounding a black hole

Mastrototaro, Leonardo; Lambiase, Gaetano

doi:10.48550/arxiv.2106.07665

Cited by 3 publications

(4 citation statements)

References 53 publications

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“…( 2) on neutrinos, following the treatment in Refs. [210][211][212][213]. Even if in the Standard Model neutrinos are assumed massless, in the last fifty years there have been various detection of the neutrino flavour oscillation phenomenon.…”

Section: Flavour Oscillationmentioning

confidence: 99%

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Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes

et al. 2022

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Motivated by recent work on the Modified Maxwell (ModMax) black holes [Phys Lett B 10.1016/j.physletb.2020.136011], which are invariant in duality rotations and conformal transformations founded in [Phys Rev D 10.1103/PhysRevD.102.121703], we probe its effects on the shadow cast, weak field gravitational lensing, and neutrino propagation in its vicinity. Using the EHT data for the shadow diameter of Sgr. A* and M87*, and LIGO/VIRGO experiments for the dyonic ModMax black hole perturbations, we find constraints for ModMax parameters such as $$Q_\text {m}$$ Q m and the screening factor $$\gamma $$ γ . We also analyze how the shadow radius behaves as perceived by a static observer and one that is comoving with the cosmic expansion. The effect of the ModMax parameters is constant for a static observer, and we found That it varies when the observer is comoving with cosmic expansion. We also analyzed its effect on the weak deflection angle by exploiting the Gauss–Bonnet theorem and its application to Einstein ring formation. We also consider the finite distance effect and massive particle deflection. Our results indicate that the far approximation of massive particle gives the largest deflection angle and amplifies the effect of $$Q_\text {m}$$ Q m and $$\gamma $$ γ . Then we also calculate the quasinormal modes and greybody bounds which encode unique characteristic features of the dyonic ModMax black hole. With the advent of improving space technology, we reported that it is possible to detect the deviation caused through the shadow cast, Einstein rings, quasinormal modes, and neutrino oscillations.

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Section: Flavour Oscillationmentioning

confidence: 99%

“…Moreover, we can discuss the effects of gravitational redshift of the considered metric on the energy spectra of ν e and νe Type II supernova explosion. The gravitational effects affect the r-process nucleosynthesis in astrophysical environments, and we might theoretically estimate that with the Y e parameter [212][213][214][215]:…”

Section: Flavour Oscillationmentioning

confidence: 99%

Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes

et al. 2022

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“…For example, neutrino flavor oscillations in stochastic gravitational waves have been studied in [4], while neutrino decoherence from quantum gravitational stochastic perturbations has been studied in [5]. Effects like spin-flip or helicity transitions are also studied in a gravitational setup [6][7][8][9]. Further, the gravitational effects on neutrino oscillations have been investigated in various backgrounds [10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Neutrino flavor oscillations in a rotating spacetime

Swami¹

2022

Preprint

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We study neutrino oscillations in a rotating spacetime under the weak gravity limit for the neutrino trajectories constrained in the equatorial plane. Using the asymptotic form of the Kerr metric, we show that the gravitational source's rotation non-trivially modifies the neutrino phase. Further, we find that the flavor transition probability deviates more prominently from the Schwarzschild spacetime results when neutrinos are produced and detected on the same side of the gravitational source, i.e., neutrino propagates only towards or away from the gravitational source. For the neutrino weak gravity lensing in the equatorial plane, we find that the effects of gravitational object spin on the neutrino phase are subdominant compared with the Schwarzschild spacetime neutrino phase. However, the rotational effect can be comparable with the gravitational mass effect in the neutrino lensing if the naked singularity condition that bounds the Kerr rotation is violated. Furthermore, we find that the neutrino phase for the non-radial neutrino emission depends on the relative angular momentum direction of the neutrino and the gravitational source. For an asymptotic observer, we find that the neutrino phase, in the leading orders of gravitational spin corrections, differs from the Schwarzschild spacetime due to the difference in the proper spatial distance of the neutrino trajectory that connects the neutrino source and the detector. In contrast, the higher-order terms, other than those arriving from the proper spatial distance, which lead to the deviation from the Schwarzschild spacetime neutrino phase, are significantly suppressed. Further, we discuss neutrino gravitational decoherence. We find that decoherence length is also sensitive to the relative direction of the neutrino angular momentum and the gravitational source rotation. Finally, we demonstrate results using numerical examples.

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“…Interaction of neutrinos with a scalar field and also its cosmological impacts has been studied vastly in the literature [34][35][36][37][38]. Interaction of a scalar field and neutrinos through a conformal coupling and its influence on the neutrinos densities and their oscillation phases were discussed in [28][29][30][31]. This kind of conformal couplings has also been used to describe the onset of the late cosmic acceleration when the neutrinos became nonrealistic [39,40], as well as to describe an early cosmic acceleration in the matter-radiation equality epoch to solve the Hubble tension problem [41].…”

Section: Introductionmentioning

confidence: 99%

Screening models and neutrino oscillations

Ahmadabadi,

Sadjadi

2021

Preprint

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In screening models with scalar-matter conformal coupling, we study the flavor transition of neutrinos. We employ an analytical method for studying the oscillation phase in a spherically symmetric space-time filled by a scalar field. Since the ambient matter density determines the scalar field's behavior, an indirect environmental effect contributes to the flavor conversion inside matter. We evaluate the survival probabilities and show that the existence of the scalar field affects the oscillations of neutrinos. We discuss the results in the framework of screening mechanisms and the end confront our results with observational data.

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Neutrino spin oscillations in conformally gravity coupling models and quintessence surrounding a black hole

Cited by 3 publications

References 53 publications

Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes

Shadow, lensing, quasinormal modes, greybody bounds and neutrino propagation by dyonic ModMax black holes

Neutrino flavor oscillations in a rotating spacetime

Screening models and neutrino oscillations

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