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As dark matter appears to comprise most of the Galactic mass, some of it may accumulate in the cores of stars, thereby making the Sun a laboratory for constraining various dark matter theories. We consider the effects on the solar structure…

Solar and Stellar Astrophysics · Physics 2025-05-06 Earl Patrick Bellinger , Matt E. Caplan

The solar neutrino anomaly, measurements discrepant from predictions of the Standard Solar Model, has existed for over 30 years. Multiple experiments measuring fluxes from several reactions in the hydrogen fusion chain have added to the…

Astrophysics · Physics 2007-05-23 Maurice Dubin , Robert K. Soberman

The observed deficit of $\rm ^8B$ solar neutrinos may call for an improved standard model of the sun or an expanded standard model of particle physics ({\it e.g.,} with neutrino masses and mixing). In the former case, contemporary fluid…

High Energy Physics - Phenomenology · Physics 2007-05-23 A. De Rújula , S. L. Glashow

We determine the solar neutrino fluxes from a global analysis of the solar and terrestrial neutrino data in the framework of three-neutrino mixing. Using a Bayesian approach we reconstruct the posterior probability distribution function for…

High Energy Physics - Phenomenology · Physics 2011-06-17 M. C. Gonzalez-Garcia , Michele Maltoni , Jordi Salvado

In this work, we derive novel constraints on scalar-tensor theories from neutrino physics. Spatial variations of the background scalar field effectively generate density and position-dependent Standard Model masses, including neutrinos.…

High Energy Physics - Phenomenology · Physics 2025-12-17 Arturo de Giorgi , Ivan Martinez Soler , Sergio Sevillano Muñoz

We investigate new physics with light-neutral mediators through coherent elastic neutrino-nucleus scattering (CE$\nu$NS) at low energies. These mediators, with a mass of less than $1$ GeV, are common properties for extensions of the…

High Energy Physics - Phenomenology · Physics 2024-01-24 Mehmet Demirci , M. Fauzi Mustamin

The results of a solar model independent analysis of the existing solar neutrino data under the assumption of MSW transitions in matter or vacuum oscillations (in the cases of $\nu_{e}$--$\nu_{\mu}(\nu_{\tau})$ and…

High Energy Physics - Phenomenology · Physics 2009-10-28 S. M. Bilenky , C. Giunti

We study the simplest Standard Model estension with only one extra right-handed neutrino. In this case there are two massless $m_{1,2}$ and two massive $m_{3,4}$ neutrinos, and in principle both solar and atmospheric anomalies can be…

High Energy Physics - Phenomenology · Physics 2011-04-15 F. Del Aguila , J. Gluza , M. Zralek

The four operating solar neutrino experiments confirm the hypothesis that the energy source for solar luminosity is hydrogen fusion. However, the measured rate for each of the four solar neutrino experiments differs significantly (by…

Astrophysics · Physics 2015-06-24 John N. Bahcall

Assuming neutrino oscillations occur, the pp electron neutrino flux is uncertain by at least a factor of two, the ${\rm ^8B}$ flux by a factor of five, and the ${\rm ^7Be}$ flux by a factor of forty-five. Calculations of the expected…

High Energy Physics - Phenomenology · Physics 2010-11-09 J. N. Bahcall , P. I. Krastev

We show that solar neutrino experiments set an upper limit of 7.8% (7.3% including the recent KamLAND measurements) to the fraction of energy that the Sun produces via the CNO fusion cycle, which is an order of magnitude improvement upon…

Astrophysics · Physics 2009-11-07 John N. Bahcall , M. C. Gonzalez-Garcia , C. Penya-Garay

We critically examine recent claims of a high solar metallicity by von Steiger \& Zurbuchen (2016) based on \textit{in situ} measurements of the solar wind, rather than the standard spectroscopically-inferred abundances (Asplund et al.…

Recent solar & atmospheric nu-data strongly indicate need for physics beyond the Standard Model. I review the ways of reconciling them in terms of 3-nu oscillations. Though not implied by data, bi-maximal nu-mixing models emerge as a…

High Energy Physics - Phenomenology · Physics 2009-09-17 J. W. F. Valle

The all-flavor solar neutrino flux measured by the Sudbury Neutrino Observatory (SNO) constrains nonstandard energy losses to less than about 10% of the Sun's photon luminosity, superseding a helioseismological argument and providing new…

Astrophysics · Physics 2010-04-30 Paolo Gondolo , Georg Raffelt

We find that vacuum oscillations (VO), large-mixing-angle and small-mixing-angle MSW solutions to the solar neutrino problem (SNP) give all very good fits to the most recent results. Measurements of the $^7$Be flux can, in some cases,…

High Energy Physics - Phenomenology · Physics 2011-01-04 E. Calabresu , N. Ferrari , G. Fiorentini , M. Lissia

The central solar temperature T and its uncertainties are calculated in helioseismologically-constrained solar models. From the best fit to the convective radius, density at the convective radius and seismically determined helium abundance…

Astrophysics · Physics 2009-10-30 B. Ricci , V. Berezinsky , S. Degl'Innocenti , W. A. Dziembowski , G. Fiorentini

We examine the constraints on non-radiative decay of neutrinos from the observations of solar neutrino experiments. The standard oscillation hypothesis among three neutrinos solves the solar and atmospheric neutrino problems. Decay of a…

High Energy Physics - Phenomenology · Physics 2008-11-26 Anjan S. Joshipura , Eduard Masso , Subhendra Mohanty

We construct solar models with the newly calculated radiative opacities from the Opacity Project (OP) and recently determined (lower) heavy element abundances. We compare results from the new models with predictions of a series of models…

Astrophysics · Physics 2009-11-10 John N. Bahcall , Aldo M. Serenelli , Sarbani Basu

Computed color indices and spectral shapes for individual stars are routinely compared with observations for essentially all spectral types, but absolute fluxes are rarely tested. We can confront observed irradiances with the predictions…

Astrophysics · Physics 2007-09-17 Carlos Allende Prieto

During the last century, with the development of modern physics in such diverse fields as thermodynamics, statistical physics, and nuclear and particle physics, the basic principles of the evolution of stars have been successfully well…

Cosmology and Nongalactic Astrophysics · Physics 2014-12-09 Jordi Casanellas , Ilídio Lopes