New prospects for iodine detector and Solar neutrinos registration

AbstractThe Sun provides a critical benchmark for the general study of stellar structure and evolution. Also, knowledge about the internal properties of the Sun is important for the understanding of solar atmospheric phenomena, including the solar magnetic cycle. Here I provide a brief overview of the theory of stellar structure and evolution, including the physical processes and parameters that are involved. This is followed by a discussion of solar evolution, extending from the birth to the latest stages. As a background for the interpretation of observations related to the solar interior I provide a rather extensive analysis of the sensitivity of solar models to the assumptions underlying their calculation. I then discuss the detailed information about the solar interior that has become available through helioseismic investigations and the detection of solar neutrinos, with further constraints provided by the observed abundances of the lightest elements. Revisions in the determination of the solar surface abundances have led to increased discrepancies, discussed in some detail, between the observational inferences and solar models. I finally briefly address the relation of the Sun to other similar stars and the prospects for asteroseismic investigations of stellar structure and evolution.

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Probing neutrino magnetic moment at the Jinping neutrino experiment

Journal of High Energy Physics ◽

10.1007/jhep08(2021)068 ◽

2021 ◽

Vol 2021 (8) ◽

Author(s):

Baobiao Yue ◽

Jiajun Liao ◽

Jiajie Ling

Keyword(s):

Magnetic Moment ◽

Liquid Scintillator ◽

Solar Neutrinos ◽

Electron Neutrino ◽

Neutrino Experiment ◽

Neutrino Magnetic Moment ◽

Systematic Uncertainties ◽

Electron Recoil ◽

Massive Neutrinos ◽

Highly Correlated

Abstract Neutrino magnetic moment (νMM) is an important property of massive neutrinos. The recent anomalous excess at few keV electronic recoils observed by the XENON1T collaboration might indicate a ∼ 2.2 × 10−11μB effective neutrino magnetic moment ($$ {\mu}_{\nu}^{\mathrm{eff}} $$ μ ν eff ) from solar neutrinos. Therefore, it is essential to carry out the νMM searches at a different experiment to confirm or exclude such a hypothesis. We study the feasibility of doing νMM measurement with 4 kton fiducial mass at Jinping neutrino experiment (Jinping) using electron recoil data from both natural and artificial neutrino sources. The sensitivity of $$ {\mu}_{\nu}^{\mathrm{eff}} $$ μ ν eff can reach < 1.2 × 10−11μB at 90% C.L. with 10-year data taking of solar neutrinos. Besides the abundance of the intrinsic low energy background 14C and 85Kr in the liquid scintillator, we find the sensitivity to νMM is highly correlated with the systematic uncertainties of pp and 85Kr. Reducing systematic uncertainties (pp and 85Kr) and the intrinsic background (14C and 85Kr) can help to improve sensitivities below these levels and reach the region of astrophysical interest. With a 3 mega-Curie (MCi) artificial neutrino source 51Cr installed at Jinping neutrino detector for 55 days, it could give us a sensitivity to the electron neutrino magnetic moment ($$ {\mu}_{\nu_e} $$ μ ν e ) with < 1.1 × 10−11μB at 90% C.L. . With the combination of those two measurements, the flavor structure of the neutrino magnetic moment can be also probed at Jinping.

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Collective plasma processes in the solar interior and the problem of the solar neutrinos deficit

Physics-Uspekhi ◽

10.1070/pu1996v039n02abeh000130 ◽

1996 ◽

Vol 39 (2) ◽

pp. 103-128 ◽

Cited By ~ 3

Author(s):

Vadim N Tsytovich ◽

R Bingham ◽

U de Angelis ◽

A Forlani

Keyword(s):

Solar Neutrinos ◽

Solar Interior ◽

Collective Plasma

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Short-time variations of solar neutrinos and solar activity cycle

Solar Physics ◽

10.1007/bf00158508 ◽

1986 ◽

Vol 106 (2) ◽

pp. 421-424 ◽

Cited By ~ 9

Author(s):

Probhas Raychaudhuri

Keyword(s):

Solar Activity ◽

Activity Cycle ◽

Solar Activity Cycle ◽

Solar Neutrinos ◽

Time Variations ◽

Short Time

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NEUTRINO OSCILLATIONS AND THE EXACT PARITY MODEL

Modern Physics Letters A ◽

10.1142/s0217732394000186 ◽

1994 ◽

Vol 09 (02) ◽

pp. 169-179 ◽

Cited By ~ 62

Author(s):

R. FOOT

Keyword(s):

Neutrino Mass ◽

General Result ◽

Neutrino Oscillations ◽

Mass Matrix ◽

Atmospheric Neutrino ◽

Solar Neutrinos ◽

Specific Model ◽

Neutrino Mixing ◽

Mixing Angles ◽

Significant Deficit

We re-examine neutrino oscillations in exact parity models. Previously it was shown in a specific model that large neutrino mixing angles result. We show here that this is a general result of neutrino mixing in exact parity models provided that the neutrino mass matrix is real. In this case, the effects of neutrino mixing in exact parity models is such that the probability of a given weak eigenstate remaining in that eigenstate averages to less than half when averaged over many oscillations. This result is interesting in view of the accumulating evidence for a significant deficit in the number of solar neutrinos. It may also be of relevance to the atmospheric neutrino anomaly.

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SOLAR NEUTRINOS WITH EXOTIC SCATTERING

Modern Physics Letters A ◽

10.1142/s0217732393000994 ◽

1993 ◽

Vol 08 (14) ◽

pp. 1273-1284 ◽

Cited By ~ 2

Author(s):

JOÃO PULIDO

Keyword(s):

Elastic Scattering ◽

Solar Neutrino ◽

Solar Neutrinos ◽

The Sun ◽

Neutral Currents ◽

Neutrino Scattering ◽

Flavor Changing ◽

Lepton Decays ◽

Neutrino Experiments ◽

Vacuum Mixing

The possibility of unconventional neutrino scattering in the Sun via flavor changing neutral currents as a possible source of the solar neutrino deficit is investigated. If the effect is really significant, a resonant process will occur. Taking into account the neutrino deficit reported by the solar neutrino experiments (Kamiokande II, SAGE Gallex), one finds Δ2m21 = (0.6–1.4) × 10−5 eV 2 with no vacuum mixing and 0.16 ≤ fex ≤ 0.34 where fex is the lepton violating coupling. Our understanding of the neutrino phenomenon in the Sun may be improved through accuracy improvements in experiments measuring νee− elastic scattering or others searching for exotic lepton decays.

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