Particle-physics model for Voloshin-Vysotsky-Okun solution to the solar-neutrino problem

1987 ◽  
Vol 58 (18) ◽  
pp. 1807-1809 ◽  
Author(s):  
M. Fukugita ◽  
T. Yanagida
Keyword(s):  
Solar Neutrino ◽  
Particle Physics ◽  
Solar Neutrino Problem ◽  
Physics Model

scholarly journals PARTICLE PHYSICS CONFRONTS THE SOLAR NEUTRINO PROBLEM

1992 ◽  
Vol 07 (22) ◽  
pp. 5387-5459 ◽  
Author(s):  
PALASH B. PAL
Keyword(s):  
Magnetic Moment ◽  
Time Variation ◽  
Solar Neutrino ◽  
Particle Physics ◽  
Magnetic Moments ◽  
Neutrino Flux ◽  
The Sun ◽  
Solar Neutrino Problem ◽  
The Earth ◽  
Near Future

This review has four parts. In Part I, we describe the reactions that produce neutrinos in the sun and the expected flux of those neutrinos on the earth. We then discuss the detection of these neutrinos, and how the results obtained differ from the theoretical expectations, leading to what is known as the solar neutrino problem. In Part II, we show how neutrino oscillations can provide a solution to the solar neutrino problem. This includes vacuum oscillations, as well as matter enhanced oscillations. In Part III, we discuss the possibility of time variation of the neutrino flux and how a magnetic moment of the neutrino can explain the phenomenon. We also discuss particle physics models which can give rise to the required values of magnetic moments. In Part IV, we present some concluding remarks and outlook for the near future.

A MODEL FOR SIMPSON’S 17 keV NEUTRINO

1992 ◽  
Vol 07 (18) ◽  
pp. 4441-4448
Author(s):  
SUBHASH RAJPOOT
Keyword(s):  
Solar Neutrino ◽  
Particle Physics ◽  
Muon Neutrinos ◽  
Β Decay ◽  
Solar Neutrino Problem ◽  
Dirac Neutrino ◽  
Dirac Particles ◽  
Electron Neutrinos

Recent studies of β-decay spectra seem to confirm Simpson’s earlier findings that the electron neutrinos contain a small (1%) admixture of a 17 keV Dirac neutrino. An unconventional model with SU(2)L×SU(2)R×U(1)B−1 gauge interactions is presented in which all neutrinos are Dirac particles. Electron and muon neutrinos acquire seesaw Dirac masses of order 10−3eV for the MSW solution for the solar neutrino problem. The τ neutrino is identified as Simpson’s 17 keV neutrino. Constraints coming from cosmology and particle physics are shown to be satisfied.

IMPLICATIONS OF THE RECENT SOLAR NEUTRINO EXPERIMENT FOR PARTICLE PHYSICS

1991 ◽  
Vol 06 (08) ◽  
pp. 645-657 ◽  
Author(s):  
M. FUKUGITA ◽  
T. YANAGIDA
Keyword(s):  
Time Variation ◽  
Solar Neutrino ◽  
Particle Physics ◽  
Neutrino Flux ◽  
The Other ◽  
Data Sets ◽  
Neutrino Experiment ◽  
Physics Model ◽  
Neutrino Experiments ◽  
Solar Neutrino Experiment

Physical implications of the results of recent solar neutrino experiments from the Homestake, Kamioka and Baksan Laboratories are discussed. We argue that the results from Homestake and Kamioka, if the two data sets are combined, strongly suggest some unusual neutrino properties rather than the modification of astrophysical models of the sun. If the time variation of neutrino captures, as observed at Homestake, is a statistical fluke, the neutrino conversion in matter proposed by Mikheyev and Smirnov among several possibilities yields the most attractive explanation for the neutrino flux deficit. We remark that the solution includes the possibility predicted by simple SO(10) models and it is tested by the gallium experiment. If the time variation at Homestake is true, on the other hand, one must explain why such an effect is not seen at Kamiokande. We stress that it is still possible to make a particle physics model which explains the two apparently contradictory observations.

THE SEARCH FOR DARK MATTER

1990 ◽  
Vol 05 (20) ◽  
pp. 1543-1553 ◽  
Author(s):  
DAVID O. CALDWELL
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Solar Neutrino ◽  
Particle Physics ◽  
Solar Neutrino Problem ◽  
The Standard Model ◽  
The Universe

The particle constituting probably more than 90% of the mass of the universe is unknown in the Standard Model of particle physics. Non-accelerator experiments, particularly those using Ge and Si detectors, and accelerator experiments, especially at SLC and LEP, have eliminated as dark matter wide classes of candidate particles. Examples are weak isodoublet neutrinos of mass ≳30 eV/c 2, sneutrinos, technibaryons, microcharged shadow matter, and probably Cosmions, which could both be dark matter and solve the solar neutrino problem.

scholarly journals ADVANCEMENTS IN SOLAR NEUTRINO PHYSICS

2013 ◽  
Vol 22 (05) ◽  
pp. 1330009 ◽  
Author(s):  
LINO MIRAMONTI ◽  
VITO ANTONELLI
Keyword(s):  
Elementary Particle ◽  
Neutrino Physics ◽  
Solar Neutrino ◽  
Particle Physics ◽  
Solar Neutrino Problem ◽  
Elementary Particle Physics ◽  
The Impact ◽  
Near Future

We review the results of solar neutrino physics, with particular attention to the data obtained and the analyses performed in the last decades, which were determinant to solve the solar neutrino problem (SNP), proving that neutrinos are massive and oscillating particles and contributing to refine the solar models. We also discuss the perspectives of the presently running experiments in this sector and of the ones planned for the near future and the impact they can have on elementary particle physics and astrophysics.

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