Oscillations of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Be</mml:mi></mml:mrow><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>7</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>solar neutrinos inside the Earth

Ioannisian, Ara; Smirnov, A. Yu.; Wyler, D.

doi:10.1103/physrevd.92.013014

Cited by 16 publications

(18 citation statements)

References 41 publications

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“…Now P max e can be even above P = cos 2 θ, which is a manifestation of the parametric enhancement of oscillations. This type of the oscillation pattern has been found in [5].…”

Section: Attenuation In the Case Of Partial Decoherencesupporting

confidence: 69%

“…Now the jump factor J m is determined by difference of the densities immediately before a jump and after a jump. The oscillation phase should be computed by integration (6). The angles θ d and θ d in the projection factors should be taken at the outer border the layer d which is not attached to the s− layer.…”

Section: Two Layers Casementioning

confidence: 99%

“…The core can be seen, in principle, using the beryllium neutrinos with relative width of the line σ E /E ∼ 0.005 [5]. Good energy reconstruction can be achieved in experiments based on the ν−nuclei scattering.…”

Section: Introductionmentioning

confidence: 99%

“…Good energy reconstruction can be achieved in experiments based on the ν−nuclei scattering. As an example, the ν− Ar interactions have been considered [6] and the energy-nadir angle distribution of events during the night time has been computed. It is shown that the nadir angle dependence of the night excess can be interpreted as hierarchical perturbations of the result for constant density profile.…”

Section: Introductionmentioning

confidence: 99%

“…In turn, this second order approximation is perturbed by the Earth core effect. With improvement of energy resolution of a detector the effect of remote structures increases [6]. The core can be seen with σ E /E < 0.1.…”

Section: Introductionmentioning

confidence: 99%

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Attenuation effect and neutrino oscillation tomography

Ioannisian

Smirnov

2017

Phys. Rev. D

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Attenuation effect is the effect of weakening of contributions to the oscillation signal from remote structures of matter density profile. The effect is a consequence of integration over the neutrino energy within the energy resolution interval. Structures of a density profile situated at distances larger than the attenuation length, λ att , are not "seen". We show that the origins of attenuation are (i) averaging of oscillations in certain layer(s) of matter, (ii) smallness of matter effect: ≡ 2EV /∆m 2 1, where V is the matter potential, and (iii) specific initial and final states on neutrinos. We elaborate on the graphic description of the attenuation which allows us to compute explicitly the effects in the 2 order for various density profiles and oscillation channels. The attenuation in the case of partial averaging is described. The effect is crucial for interpretation of oscillation data and for the oscillation tomography of the Earth with low energy (solar, supernova, atmospheric, etc.) neutrinos.

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“…Now P max e can be even above P = cos 2 θ, which is a manifestation of the parametric enhancement of oscillations. This type of the oscillation pattern has been found in [5].…”

Section: Attenuation In the Case Of Partial Decoherencesupporting

confidence: 69%

Section: Two Layers Casementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Attenuation effect and neutrino oscillation tomography

Ioannisian

Smirnov

2017

Phys. Rev. D

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Constraints on flavor-diagonal non-standard neutrino interactions from Borexino Phase-II

Agarwalla¹,

Agostini²,

Altenmüller³

et al. 2020

J. High Energ. Phys.

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The Borexino detector measures solar neutrino fluxes via neutrino-electron elastic scattering. Observed spectra are determined by the solar-ν e survival probability P ee (E), and the chiral couplings of the neutrino and electron. Some theories of physics beyond the Standard Model postulate the existence of Non-Standard Interactions (NSI's) which modify the chiral couplings and P ee (E). In this paper, we search for such NSI's, in particular, flavor-diagonal neutral current interactions that modify the ν e e and ν τ e couplings using Borexino Phase II data. Standard Solar Model predictions of the solar neutrino fluxes for both high-and low-metallicity assumptions are considered. No indication of new physics is found at the level of sensitivity of the detector and constraints on the parameters of the NSI's are placed. In addition, with the same dataset the value of sin 2 θ W is obtained with a precision comparable to that achieved in reactor antineutrino experiments.

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Locating the core-mantle boundary using oscillations of atmospheric neutrinos

Upadhyay

Kumar

Agarwalla

et al. 2023

J. High Energ. Phys.

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Atmospheric neutrinos provide a unique avenue to explore the internal structure of Earth based on weak interactions, which is complementary to seismic studies and gravitational measurements. In this work, we demonstrate that the atmospheric neutrino oscillations in the presence of Earth matter can serve as an important tool to locate the core-mantle boundary (CMB). An atmospheric neutrino detector like the proposed 50 kt magnetized ICAL at INO can observe the core-passing neutrinos efficiently. These neutrinos would have experienced the MSW resonance and the parametric or neutrino oscillation length resonance. The net effect of these resonances on neutrino flavor conversions depends upon the location of CMB and the density jump at that radius. We quantify the capability of ICAL to measure the location of CMB in the context of multiple three-layered models of Earth. For the model where the density and the radius of core are kept flexible while the mass and radius of Earth as well as the densities of outer and inner mantle are fixed, ICAL can determine the location of CMB with a 1σ precision of about 250 km with an exposure of 1000 kt yr. With the 81-layered PREM profile, this 1σ precision would be about 350 km. The charge identification capability of ICAL plays an important role in achieving this precision.

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Oscillations of theBe7solar neutrinos inside the Earth

Cited by 16 publications

References 41 publications

Attenuation effect and neutrino oscillation tomography

Attenuation effect and neutrino oscillation tomography

Constraints on flavor-diagonal non-standard neutrino interactions from Borexino Phase-II

Locating the core-mantle boundary using oscillations of atmospheric neutrinos

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