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arXiv · hep-ph/9804390

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

J. Bernabeu·D. Gomez Dumm·J. Vidal
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Abstract

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

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J. Bernabeu, D. Gomez Dumm, J. Vidal. 1998-04-24. $ηγZ$ anomaly from the $η-->γμ+μ-$ decay. https://doi.org/10.1016/s0370-2693(98)00506-1

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