Search results
Results from the WOW.Com Content Network
In nuclear physics and atomic physics, weak charge, or rarely neutral weak charge, 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 . [ 1 ]
where Y W is the weak hypercharge of a particle with electrical charge Q (in elementary charge units) and weak isospin T 3. Weak hypercharge is the generator of the U(1) component of the electroweak gauge group; whereas some particles have a weak isospin of zero, all known spin- 1 / 2 particles have a non-zero weak hypercharge. [f]
bosons are named after the weak force. The physicist Steven Weinberg named the additional particle the "Z particle", [4] and later gave the explanation that it was the last additional particle needed by the model. The W bosons had already been named, and the Z bosons were named for having zero electric charge. [5] The two W
The weak interaction is responsible for various forms of particle decay, such as beta decay. It is weak and short-range, due to the fact that the weak mediating particles, W and Z bosons, have mass. W bosons have electric charge and mediate interactions that change the particle type (referred to as flavor) and charge.
Weinberg's weak mixing angle θ W, and relation between coupling constants g, g′, and e. Adapted from Lee (1981). [7] The pattern of weak isospin, T 3, and weak hypercharge, Y W, of the known elementary particles, showing the electric charge, Q, along the weak mixing angle. The neutral Higgs field (circled) breaks the electroweak symmetry and ...
In the Standard Model of electroweak interactions of particle physics, the weak hypercharge is a quantum number relating the electric charge and the third component of weak isospin. It is frequently denoted Y W {\displaystyle Y_{\mathsf {W}}} and corresponds to the gauge symmetry U(1) .
Standard Model of Particle Physics. The diagram shows the elementary particles of the Standard Model (the Higgs boson, the three generations of quarks and leptons, and the gauge bosons), including their names, masses, spins, charges, chiralities, and interactions with the strong, weak and electromagnetic forces.
denotes the weak isospin of the fermions, Q their electric charge and their weak charge. These couplings amount to essentially left chiral for neutrinos and axial for charged leptons . The Z boson can couple to any Standard Model particle, except gluons and photons ( sterile neutrinos would also be an exception, if they were found to exist).