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A neutrino (/ nj uː ˈ t r iː n oʊ / new-TREE-noh; denoted by the Greek letter ν) is an elementary particle that interacts via the weak interaction and gravity. [2] [3] The neutrino is so named because it is electrically neutral and because its rest mass is so small that it was long thought to be zero.
The electron neutrino ( ν e) is an elementary particle which has zero electric charge and a spin of 1 ⁄ 2.Together with the electron, it forms the first generation of leptons, hence the name electron neutrino.
The zero mass of neutrino is in close agreement with current direct experimental observations of the mass. [33] However, it is known from indirect experiments—most prominently from observed neutrino oscillations [34] —that neutrinos have to have a nonzero mass, probably less than 2 eV/c 2. [35]
The muon neutrino is an elementary particle which has the symbol ν μ and zero electric charge. Together with the muon it forms the second generation of leptons, hence the name muon neutrino. It was discovered in 1962 by Leon Lederman, Melvin Schwartz and Jack Steinberger. The discovery was rewarded with the 1988 Nobel Prize in Physics.
The neutrino mass m is currently estimated as being 2 eV/c², and is possibly even lower than 0.2 eV/c². According to the latter mass value and the formula for relativistic energy, relative speed differences between light and neutrinos are smaller at high energies, and should arise as indicated in the figure on the right.
KM3NeT comprises two large neutrino detectors at the bottom of th. ... "Neutrinos have zero charge, zero size, almost zero mass and almost zero interaction. They are the closest thing to nothing ...
The problem of neutrino mass hierarchy is related to the fact that present experimental data on neutrino oscillations allow two possible classes of solutions. [ 1 ] In the first class, called Normal Hierarchy (NH) or Normal Ordering (NO), the two lightest mass eigenstates have a small mass difference, of the order of 10 meV, while the third ...
A solar neutrino is a neutrino originating from nuclear fusion in the Sun's core, and is the most common type of neutrino passing through any source observed on Earth at any particular moment. [citation needed] Neutrinos are elementary particles with extremely small rest mass and a neutral electric charge.