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Probing Universal Extra Dimension at the International Linear Collider

Gautam Bhattacharyya·Paramita Dey·Anirban Kundu·Amitava Raychaudhuri
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Abstract

In the context of an universal extra-dimensional scenario, we consider production of the first Kaluza-Klein electron positron pair in an $e^+e^-$ collider as a case-study for the future International Linear Collider. The Kaluza-Klein electron decays into a nearly degenerate Kaluza-Klein photon and a standard electron, the former carrying away missing energy. The Kaluza-Klein electron and photon states are heavy with their masses around the inverse radius of compactification, and their splitting is controlled by radiative corrections originating from bulk and brane-localised interactions. We look for the signal event $e^+e^- +$ large missing energy for $\sqrt s = 1$ TeV and observe that with a few hundred fb$^{-1}$ luminosity the signal will be readily detectable over the standard model background. We comment on how this signal may be distinguished from similar events from other new physics.

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Gautam Bhattacharyya, Paramita Dey, Anirban Kundu, Amitava Raychaudhuri. 2005-09-02. Probing Universal Extra Dimension at the International Linear Collider. https://doi.org/10.1016/j.physletb.2005.08.117

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