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The weak force is mediated by massive vector bosons: mW. = 80 GeV. mZ. = 91 GeV. Examples: (The list below is not complete, will see more vertices later!) Weak interactions of electrons and neutrinos: e. + W. Z. e+. Z. e. Boson Self-Interactions. In QCD the gluons carry colour charge. In the weak interaction the. ± W and.
In nuclear physics and particle physics, the weak interaction, also called the weak force, is one of the four known fundamental interactions, with the others being electromagnetism, the strong interaction, and gravitation.
There are four fundamental forces at work in the universe: the strong force, the weak force, the electromagnetic force, and the gravitational force. They work over different ranges and have different strengths.
β – and β + decay are examples of the weak interaction in action; In β – decay, a neutron turns into a proton emitting an electron and an anti-electron neutrino; The W – boson is the exchange particle in this interaction
The role of the weak force in the transmutation of quarks makes it the interaction involved in many decays of nuclear particles which require a change of a quark from one flavor to another. It was in radioactive decay such as beta decay that the existence of the weak interaction was first revealed.
Weak interactions base on transitions e− → νe, d → u and similar. Natural to group the leptons and quarks into weak iso-doublets le = νe e− , lq = u d each with isospin |1 2, ± 1 2i for upper/lower entries. Define weak isospin, make Lagrangian globally phase invariant, promote to local phase invariance and introduce corresponding
The weak force governs beta decay and neutrino interactions with nuclei. The strong force, which we generally call the nuclear force, is actually the force that binds quarks together to form baryons (3 quarks) and mesons (a quark and an anti-quark).
