Extra Dimensions: A View from the Top

Details Extra Dimensions: A View from the Top Extra Dimensions: A View from the Top

2000-10-02

arxiv.org/abs/hep-ph/0010010v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Typos corrected, references added. 12 pages, LaTeX, 2 ps figures

Scientific paper

In models with compact extra dimensions, where the Standard Model fields are confined to a 3+1 dimensional hyperplane, the $t \bar t$ production cross-section at a hadron collider can receive significant contributions from multiple exchange of KK modes of the graviton. These are carefully computed in the well-known ADD and RS scenarios, taking the energy dependence of the sum over graviton propagators into account. Using data from Run-I of the Tevatron, 95% C.L. bounds on the parameter space of both models are derived. For Run-II of the Tevatron and LHC, discovery limits are estimated.

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