Weak charge

In nuclear physics and atomic physics, 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] It also shows an effect of parity violation during electron scattering.

This same term is sometimes also used to refer to other, different quantities, such as weak isospin,^[2] weak hypercharge, or the vector coupling of a fermion to the Z boson (i.e. the coupling strength of weak neutral currents).^[3]

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^ Cite error: The named reference U-Nürnberg-prop-Z0 was invoked but never defined (see the help page).
^ Cite error: The named reference Woods-SLAC-E158 was invoked but never defined (see the help page).

[Hagen-Ekström-Forssén-etal-2016-NatPhys-1] Cite error: The named reference Hagen-Ekström-Forssén-etal-2016-NatPhys was invoked but never defined (see the help page).

[U-Nürnberg-prop-Z0-2] Cite error: The named reference U-Nürnberg-prop-Z0 was invoked but never defined (see the help page).

[Woods-SLAC-E158-3] Cite error: The named reference Woods-SLAC-E158 was invoked but never defined (see the help page).

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