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2 giorni fa · Solar neutrino problem (1968 –2001): Solved by a new understanding of neutrino physics, requiring a modification of the Standard Model of particle physics—specifically, neutrino oscillation. Saturn's core spin was determined from its gravitational field. Nuclear physics
2 giorni fa · This resolved the solar neutrino problem: the electron neutrinos produced in the Sun had partly changed into other flavors which the experiments could not detect. Although individual experiments, such as the set of solar neutrino experiments, are consistent with non-oscillatory mechanisms of neutrino flavor conversion, taken ...
- 1 /2ℏ
- 0 e
- ν, ₑ, ν, μ, ν, τ, ν, ₑ, ν, μ, ν, τ
- < 0.120 eV (< 2.14 × 10−37 kg), 95% confidence level, sum of 3 "flavours"
1 giorno fa · The only problem with the results found in this experiment was that it detected only about one third of the solar neutrinos that theoretical models predicted. Scientists around the world then built other neutrino detectors: Kamiokande in Japan, SAGE in the Soviet Union, GALLEX in Italy and Super-Kamiokande.
13 mag 2024 · The Super-Kamiokande experiment continues to produce results for a vast array of physics topics. The latest atmospheric neutrino analysis suggests the presence of a CP-violating Dirac phase along with a 92.3% confidence level rejection of the inverted mass ordering. The solar neutrino results shown here provide the first evidence at 3 𝜎 ...
26 apr 2024 · This deficit became known as the solar neutrino problem. Davis’s results were later confirmed by Koshiba, who also found evidence that neutrinos change from one type to another in flight. Because Davis’s detector was sensitive to only one type, those that had switched identity eluded detection.
- The Editors of Encyclopaedia Britannica
5 giorni fa · These experimental results appear to have solved the long-standing solar neutrino problem, and the physics of massive neutrinos remains an area of active theoretical and experimental research. The Large Hadron Collider has already found the Higgs boson, but future research aims to prove or disprove the supersymmetry , which extends the Standard Model of particle physics.
8 mag 2024 · Abstract: We quantify the effects on the evolution of solar neutrinos of light spin-zero particles with pseudoscalar couplings to leptons and scalar couplings to nucleons. In this scenario the matter potential sourced by the nucleons in the Sun's matter gives rise to spin precession of the relativistic neutrino ensemble.
