$ηγZ$ anomaly from the $η-->γμ+μ-$ decay

Details $ηγZ$ anomaly from the $η-->γμ+μ-$ decay $ηγZ$ anomaly from the $η-->γμ+μ-$ decay

1998-04-24

arxiv.org/abs/hep-ph/9804390v1

Phys.Lett. B429 (1998) 151-157

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages incl. 2 eps figures, REVTeX

Scientific paper

10.1016/S0370-2693(98)00506-1

We show that the $\eta\gamma Z$ anomaly can be measured by analysing parity-violating effects in the $\eta-->\gamma\mu+\mu-$ decay. In this sense, we find that the longitudinal polarization of the outgoing $\mu^+$ is an appropriate observable to be considered in future high-statistics $\eta$ factories. The effect is expected to lie in the range $10^{-5}-10^{-6}$ in the Standard Model.

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