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Probing large extra dimensions with spin configuration of top quark pair production at the JLC

Kang Young Lee·JeongHyeon Song·Seong Chan Park·H. S. Song·Chaehyun Yu
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Abstract

We explore signatures of large extra dimensions with a polarized electron/positrn beam at the Joint Linear Collider (JLC). We point out that spin informations can be useful to study indirect signals for large extra dimensions due to spin-2 nature of Kaluza-Klein gravitons. The spin configurations of the top quark pair production at $e^+ e^-$ and $γγ$ collisions provide an unique testing ground to search for effects of the large extra dimensions. Especially we show the forward-backward asymmetry is a good probe at $e^+ e^- \to t \bar{t}$ process and we can define a new asymmetry observable effective for $γγ\to t \bar{t}$ process.

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Kang Young Lee, JeongHyeon Song, Seong Chan Park, H. S. Song, Chaehyun Yu. 2001-06-18. Probing large extra dimensions with spin configuration of top quark pair production at the JLC. https://arxiv.org/abs/hep-ph/0105326

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