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The lepton flavor violating signal of the extra gauge boson Z′ in photon-photon collision at the ILC

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Abstract

The hitherto unconstrained lepton flavor mixings, induced by the new gauge boson Z′, which are the prediction of many new physics models, such as topcolor-assisted technicolor (TC2) models and flavor-universal TC2 models, may lead to the lepton flavor violating productions of τ \( \bar \mu \), τ \( \bar e \) and µ\( \bar e \) in photon-photon collision at the proposed International Linear Collider (ILC). Through a comparative analysis of these processes, we find that the better channel to probe the new physics models is the production of τ \( \bar \mu \) or τ \( \bar e \) which occurs at a much higher rate than µ\( \bar e \) production due to the large mixing angle and the large flavor changing coupling, and may reach the detectable level of the ILC for a large part of the parameter space. Since the rates predicted by the Standard Model are far below the detectable level, these processes may serve as a sensitive probe for such new physics models.

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Authors and Affiliations

  1. Physics Department, Zhengzhou University, Zhengzhou, 450001, China

    GuoLi Liu

  2. Kavli Institute for Theoretical Physics China, Chinese Academy of Sciences, Beijing, 100190, China

    GuoLi Liu

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Liu, G. The lepton flavor violating signal of the extra gauge boson Z′ in photon-photon collision at the ILC. Sci. China Phys. Mech. Astron. 53, 1992–1997 (2010). https://doi.org/10.1007/s11433-010-4140-9

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  • DOI: https://doi.org/10.1007/s11433-010-4140-9

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