- either of two types of charged intermediate vector bosons, one having a positive charge and the other a negative charge. Symbols: W+, W−
Origin of W particle
First recorded in 1970–75; apparently for weak
Also called W boson.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- physics a type of elementary particle with either a positive or negative charge considered to transmit the weak interaction between other elementary particles. W particles have a rest mass of 1.435 × 10 –25 kgAlso called: W boson See also Z particle
- A subatomic particle with positive electric charge that mediates the weak nuclear force. The W boson has a mass 160,000 times that of the electron. Unlike the other weak force mediator (the Z boson), the W boson changes particles it interacts with into other kinds of particles; for example, in beta-plus decay(a kind of beta decay), an up quark in a proton decays into a down quark by emitting a W boson, changing the proton into a neutron. The W boson itself decays into a positron and an electron neutrino. See Table at subatomic particle.
- See W boson.
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