Results 1 to 10 of about 771 (132)

The Relevance of Nuclear Reactions for Standard Solar Models Construction

open access: yesFrontiers in Astronomy and Space Sciences, 2021
The fundamental processes by which nuclear energy is generated in the Sun have been known for many years. However, continuous progress in areas such as neutrino experiments, stellar spectroscopy and helioseismic data and techniques requires ever more ...
Francesco L. Villante   +3 more
doaj   +1 more source

Statistical significance of the sterile-neutrino hypothesis in the context of reactor and gallium data

open access: yesJournal of High Energy Physics, 2022
We evaluate the statistical significance of the 3+1 sterile-neutrino hypothesis using ν e and ν ¯ $$ \overline{\nu} $$ e disappearance data from reactor, solar and gallium radioactive source experiments.
Jeffrey M. Berryman   +4 more
doaj   +1 more source

Implications of the Dark-LMA solution for neutrino mass matrices

open access: yesNuclear Physics B, 2021
In this work we have re-investigated two different kinds of texture zero ansatz of the low energy neutrino mass matrix in view of the Dark-Large-Mixing-Angle (DLMA) solution of the solar neutrino problem which can arise in the presence of non-standard ...
Monojit Ghosh   +2 more
doaj   +1 more source

Neutrinos and Asteroseismology of Stars over the Helium Flash

open access: yesThe Astrophysical Journal, 2023
The helium flash, occurring in stars of 0.6–2.0 M _⊙ at the end of the red giant branch, is not observable via optical means due to the energy of the process being used to lift the core out of degeneracy.
Diogo Capelo, Ilídio Lopes
doaj   +1 more source

Analysis of Solar Neutrino Data from Super-Kamiokande I and II

open access: yesEntropy, 2014
We are going back to the roots of the original solar neutrino problem: the analysis of data from solar neutrino experiments. The application of standard deviation analysis (SDA) and diffusion entropy analysis (DEA) to the Super-Kamiokande I and II data ...
Hans J. Haubold   +2 more
doaj   +1 more source

The Nature of Massive Neutrinos

open access: yesAdvances in High Energy Physics, 2013
The compelling experimental evidences for oscillations of solar, reactor, atmospheric, and accelerator neutrinos imply the existence of 3-neutrino mixing in the weak charged lepton current.
S. T. Petcov
doaj   +1 more source

Sensitivity of a low threshold directional detector to CNO-cycle solar neutrinos

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
A first measurement of neutrinos from the CNO fusion cycle in the Sun would allow a resolution to the current solar metallicity problem. Detection of these low-energy neutrinos requires a low-threshold detector, while discrimination from radioactive ...
R. Bonventre, G. D. Orebi Gann
doaj   +1 more source

Solar Neutrinos

open access: yesAdvances in High Energy Physics, 2013
The study of solar neutrinos has given a fundamental contribution both to astroparticle and to elementary particle physics, offering an ideal test of solar models and offering at the same time relevant indications on the fundamental interactions among ...
V. Antonelli   +3 more
doaj   +1 more source

Solar Models and Astrophysical S-factors Constrained by Helioseismic Results and Updated Neutrino Fluxes

open access: yesThe Astrophysical Journal
The ratio of metal abundance to hydrogen abundance of the solar photosphere, ( Z / X ) _s , has been revised several times. Standard solar models, based on these revised solar abundances, are in disagreement with seismically inferred results.
Wuming Yang, Zhijia Tian
doaj   +1 more source

Laboratory Magnetoplasmas as Stellar-like Environment for 7Be β-Decay Investigations Within the PANDORA Project

open access: yesUniverse
Laboratory magnetoplasmas can become an intriguing experimental environment for fundamental studies relevant to nuclear astrophysics processes. Theoretical predictions indicate that the ionization state of isotopes within the plasma can significantly ...
Eugenia Naselli   +7 more
doaj   +1 more source

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