Charged current

Electromagnetism

Electricity Magnetism
Electrostatics Electric charge Static electricity Electric field Conductor Insulator Triboelectricity Electrostatic discharge Induction Coulomb's law Gauss's law Electric flux / potential energy Electric dipole moment Polarization density
Magnetostatics Ampère's law Magnetic field Magnetization Magnetic flux Biot–Savart law Magnetic dipole moment Gauss's law for magnetism
Electrodynamics Lorentz force law Electromagnetic induction Faraday's law Lenz's law Displacement current Magnetic potential Maxwell's equations Electromagnetic field Electromagnetic radiation Maxwell tensor Poynting vector Liénard–Wiechert potential Jefimenko's equations Eddy current London equations Mathematical descriptions of the electromagnetic field
Electrical network Electric current Electric potential Voltage Resistance Ohm's law Series circuit Parallel circuit Direct current Alternating current Charged current Neutral current Electromotive force Capacitance Inductance Impedance Resonant cavities Waveguides
Covariant formulation Electromagnetic tensor (stress–energy tensor) Four-current Electromagnetic four-potential
Scientists Ampère Coulomb Faraday Gauss Heaviside Henry Hertz Lorentz Maxwell Tesla Volta Weber Ørsted

The charged current interaction is one of the ways in which subatomic particles can interact by means of the weak force. It is mediated by the
W+
and
W−
bosons.

The interaction is often incorrectly believed to be called 'charged' because the W bosons have electric charge. However, the charged current that gives the interaction its name is that of the interacting particles. For example, the charged-current contribution to the
ν
e
e−
→
ν
e
e−
elastic scattering amplitude

${\mathfrak {M}}^{{{\mathrm {CC}}}}\propto J_{{\mu }}^{{{\mathrm {(CC)}}}}({\mathrm {e^{{-}}}}\to \nu _{{{\mathrm {e}}}})\;J^{{{\mathrm {(CC)}}\mu }}(\nu _{{{\mathrm {e}}}}\to {\mathrm {e^{{-}}}})$

where the charged currents describing the flow of one fermion into the other are given by

$J^{{{\mathrm {(CC)\mu }}}}(f\to f')={\bar {u}}_{{f'}}\gamma ^{{\mu }}{\frac {1}{2}}\left(1-\gamma ^{{5}}\right)u_{{f}}.$

Charged current

See also