Abstract
After briefly discussing the importance of the precise measurement of the weak mixing angle, the implication of the dark Z on the low-Q2 parity tests is discussed. The dark Z is a very light (roughly, MeV-GeV scale) gauge boson, which couples to the electromagnetic current as well as the weak neutral current.
Abstract
After briefly discussing the importance of the precise measurement of the weak mixing angle, the implication of the dark Z on the low-Q2 parity tests is discussed. The dark Z is a very light (roughly, MeV-GeV scale) gauge boson, which couples to the electromagnetic current as well as the weak neutral current.