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I describe the current status of the solar neutrino problem, summarizing the arguments that its resolution will require new particle physics. The phenomenon of matter-enhanced neutrino oscillations is reviewed. I consider the implications…

Nuclear Theory · Physics 2007-05-23 W. C. Haxton

All existing measurements of the solar neutrino flux are compared with the predictions of the most recent solar model by Bahcall and Pinsonneault, modified by introducing the hypothesis of neutrino oscillations with mass differences large…

High Energy Physics - Phenomenology · Physics 2011-04-15 G. Conforto , A. Marchionni , F. Martelli , F. Vetrano

Much of our understanding of the internal structure of the Sun derives from so-called standard theoretical solar models. Unfortunately, none of those models agrees completely with observation. The discrepancy is commonly associated with…

Solar and Stellar Astrophysics · Physics 2019-04-10 Douglas Gough

Solar neutrinos, generated abundantly by thermonuclear reactions in the solar interior, offer a unique tool for studying astrophysics and particle physics. The observation of solar neutrinos has led to the discovery of neutrino oscillation,…

High Energy Physics - Phenomenology · Physics 2025-01-20 Shaomin Chen , Xun-Jie Xu

The Sudbury Neutrino Observatory (SNO) has measured day and night solar neutrino energy spectra and rates. For charged current events, assuming an undistorted $^8$B spectrum, the night minus day rate is $14.0% \pm 6.3% ^{+1.5}_{-1.4}%$ of…

Nuclear Experiment · Physics 2012-08-27 SNO Collaboration

We extract information on the fluxes of Be and CNO neutrinos directly from solar neutrino experiments, with minimal assumptions about solar models. Next we compare these results with solar models, both standard and non standard ones.…

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

The solar and atmospheric neutrino anomalies constitute the only solid and most remarkable evidence for physics beyond the Standard Model, indicating that the lepton mixing matrix is fundamentally distinct from that describing the quarks.…

High Energy Physics - Phenomenology · Physics 2007-05-23 M. Hirsch , W. Porod , J. Romao , J. W. F. Valle

We present an updated analysis of the solar neutrino problem in terms of both Mikheyev-Smirnov-Wolfenstein (MSW) and vacuum neutrino oscillations, with the inclusion of the preliminary data collected by the SuperKamiokande experiment during…

High Energy Physics - Phenomenology · Physics 2009-10-07 G. L. Fogli , E. Lisi , D. Montanino

We study the solar neutrino problem within the framework of a parametrized post-Newtonian formulation for the gravitational interaction of the neutrinos, which incorporates a violation to the equivalence principle (VEP). Using the current…

High Energy Physics - Phenomenology · Physics 2009-10-31 H. Casini , J. C. D'Olivo , R. Montemayor

The current status of oscillation solutions to the Solar Neutrino Problem is reviewed. Four oscillation solutions are discussed in the light of 708d Superkamiokande data: MSW, Just-So VO, VO with Energy-Independent Suppression (EIS) and…

High Energy Physics - Phenomenology · Physics 2011-08-17 V. Berezinsky

The Lehmann-Newton-Wu mass matrix, which was recently applied to neutrinos, is further investigated. The analytic results presented earlier are confirmed numerically for the solar density profile of the Standard Solar Model. The combined…

High Energy Physics - Phenomenology · Physics 2009-10-31 Per Osland , Geir Vigdel

The addition of $m$ singlet right-handed neutrinos to the Standard Model leads to radiatively generated mass corrections for the $SU(2)_L $ doublet neutrinos. For those neutrinos which are massless at the tree level after this addition,…

High Energy Physics - Phenomenology · Physics 2011-09-21 Debajyoti Choudhury , Raj Gandhi , J. A. Gracey , Biswarup Mukhopadhyaya

We discuss various aspects of the solar neutrino spectrum distortion and time variations of fluxes. (i) Oscillations of neutrinos which cross the mantle and the core of the Earth can be parametrically enhanced. The parametric effect gives…

High Energy Physics - Phenomenology · Physics 2009-10-31 A. Yu. Smirnov

A model of neutrino oscillations is presented that has only three degrees of freedom and is consistent with existing data. The model is a subset of the renormalizable sector of the Standard-Model Extension (SME), and it offers an…

High Energy Physics - Phenomenology · Physics 2008-11-26 Teppei Katori , Alan Kostelecky , Rex Tayloe

The standard solar model was so reliable that it could predict the existence of the massive neutrino. Helioseismology measurements were so precise that they could determine the depth of the convection zone. This agreement between theory and…

Astrophysics · Physics 2009-11-13 J. T. Schmelz , K. Nasraoui , J. K. Roames , L. A. Lippner , J. W. Garst

As neutrinos become a significant background for projected dark matter experiments, the community will become concerned with determining if events counted in a dark matter experiment are good dark matter candidates or low-energy neutrinos…

High Energy Physics - Phenomenology · Physics 2016-05-09 Nicole Hartman , Stephen Sekula

Assuming that the observed deficit of solar neutrinos is due to the interaction of their transition magnetic moment with the solar magnetic field we derive the predictions for the forthcoming Borexino experiment. Three different model…

High Energy Physics - Phenomenology · Physics 2008-11-26 E. Kh. Akhmedov , J. Pulido

The large value of \S17 = 22.1 \xpm 0.6 eV-b, reported by the Seattle group, suggests a larger total \b8 solar neutrino flux. Together with the two high precision values quoted for \s34 it is either 20% or 9% larger than measured by SNO.…

Nuclear Experiment · Physics 2007-05-23 Moshe Gai

The neutral leptonic sector of the Standard Model presumably consists of three neutrinos with non-zero Majorana masses with properties further determined by three mixing angles and three CP-violating phases. We derive the general…

High Energy Physics - Phenomenology · Physics 2014-11-17 J. A. Casas , J. R. Espinosa , A. Ibarra , I. Navarro

We perform global analysis of the solar neutrino data including the day and night spectra of events at SNO. In the context of two active neutrino mixing, the best fit of the data is provided by the LMA MSW solution with Delta m^2 = 6.15…

High Energy Physics - Phenomenology · Physics 2009-11-07 P. C. de Holanda , A. Yu. Smirnov
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