Top quark phenomenology of the ADD model and the Minimal Length Scenario

TL;DR

This paper investigates how the Minimal Length Scenario modifies top quark pair production predictions in extra-dimensional models, revealing significant effects and potential experimental constraints at TeV scales.

Contribution

It introduces the MLS as a natural regulator in ADD models, analyzing its impact on top quark production and distinguishing phenomenological differences from the standard ADD scenario.

Findings

Sizable effects on cross sections due to graviton mediation are predicted.

Potential experimental limits on the string scale M_S are identified.

Distinct phenomenological signatures differentiate MLS-modified ADD from the simple ADD model.

Abstract

We study top-(anti)quark pair production at the Tevatron and Large Hadron Collider (LHC) in the context of the Minimal Length Scenario (MLS) of the Arkani-Hamed, Dimopoulos and Dvali (ADD) model of extra dimensions (XDs). We show that sizable effects onto both the integrated and differential cross section due to graviton mediation are expected for a String scale, M_S, of O(1-10TeV) and several XDs, \delta, all compatible with current experimental constraints. Potential limits on M_S are extracted. We also highlight clear phenomenological differences between a simple ADD scenario and its modification based on using the MLS as a natural regulator for divergent amplitudes of virtual KK graviton exchange.