Search results
Results From The WOW.Com Content Network
The antineutron is the antiparticle of the neutron with symbol n. It differs from the neutron only in that some of its properties have equal magnitude but opposite sign.It has the same mass as the neutron, and no net electric charge, but has opposite baryon number (+1 for neutron, −1 for the antineutron).
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.
boson (a particle with a charge of +1) and be thereby converted into a corresponding neutrino (with a charge of 0), where the type ("flavour") of neutrino (electron ν e, muon ν μ, or tau ν τ) is the same as the type of lepton in the interaction, for example: + +
The electron neutrino was simply called the neutrino, as it was not yet known that neutrinos came in different flavours (or different "generations"). Nearly 40 years after the discovery of the electron, the muon was discovered by Carl D. Anderson in 1936. Due to its mass, it was initially categorized as a meson rather than a lepton. [26]
The mass of the neutron is greater than that of the proton by 1.293 32 MeV/c 2, [25] hence the neutron's mass provides energy sufficient for the creation of the proton, electron, and anti-neutrino. In the decay process, the proton, electron, and electron anti-neutrino conserve the energy, charge, and lepton number of the neutron. [26]
The electron neutrino has a corresponding antiparticle, the electron antineutrino (ν e), which differs only in that some of its properties have equal magnitude but opposite sign. One major open question in particle physics is whether neutrinos and anti-neutrinos are the same particle.
where we use the symbol k to denote the quantum numbers p and σ of the previous section and the sign of the energy, E(k), and a k denotes the corresponding annihilation operators. Of course, since we are dealing with fermions , we have to have the operators satisfy canonical anti-commutation relations.
Kaon; Composition: K + u s. K 0 d s. K − s u: Statistics: Bosonic: Family: Mesons: Interactions: Strong, weak, electromagnetic, gravitational: Symbol: K + K 0 K −: Antiparticle: K + K −. K 0 K 0. K − K +: Discovered: 1947 (Clifford Butler and George Rochester at Department of Physics and Astronomy, University of Manchester)