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B − L. −1. X. −3. A neutrino ( / njuːˈtriːnoʊ / new-TREE-noh; denoted by the Greek letter ν) is a fermion (an elementary particle with spin of 1 2) that interacts only 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 ( -ino) that it was ...
29 de ago. de 2017 · I review aspects of the theory of the weak interaction in a set of lectures originally presented at the 2016 CERN-JINR European School of Particle Physics. The topics discussed are: (1) the experimental basis of the V-A structure of the weak interaction; (2) precision electroweak measurements at the Z resonance; (3) the Goldstone Boson Equivalence Theorem; (4) the Standard Model theory of the ...
weak interaction (countable and uncountable, plural weak interactions) The fundamental interaction responsible for the weak nuclear force. Synonyms [edit] weak nuclear interaction; Translations [edit]
All fundamental interactions of elementary particles, with the exception of the weak interaction, are symmetric under parity. As established by the Wu experiment conducted at the US National Bureau of Standards by Chinese-American scientist Chien-Shiung Wu , the weak interaction is chiral and thus provides a means for probing chirality in physics.
Electrons and protons are attracted to each other via the electromagnetic interaction. However, when they interact with each other, it is the weak interaction that facilitates the collision. Both electron capture and electron-proton collisions have the same decay equation. Electron capture is when an atomic electron is absorbed by a proton in ...
WITCH (standing for " Weak Interaction Trap for Charged particles "), or experiment IS433, was a double Penning trap experiment to measure the recoil energy of decaying nuclei. A spectrometer in combination with a position-sensitive microchannel plate detector (MCP) was used to count ions while scanning their energy.
In nuclear physics and atomic physics, refers to the Standard Model weak interaction coupling of a particle to the Z boson. For example, for any given nuclear isotope, the total weak charge is approximately −0.99 per neutron, and +0.07 per proton. It also shows an effect of parity violation during electron scattering.
