Large Extra Dimensions at LHC Run 2

TL;DR

This paper sets new experimental limits on large extra dimensions using LHC Run 2 data, improving constraints on graviton exchange effects through analysis of dijet angular distributions.

Contribution

It provides the first limits on the effective operator coefficient from LHC Run 2 data and compares these to full graviton amplitude calculations, considering additional dataset constraints.

Findings

CMS sets a limit of $M_T > 6.8$ TeV with 2.6 fb$^{-1}$

ATLAS sets a limit of $M_T > 8.3$ TeV with 3.6 fb$^{-1}$

Comparison shows the limits are consistent with full amplitude calculations.

Abstract

I extract new limits on the coefficient of the effective operator generated by tree-level graviton exchange in large extra dimensions from $pp \rightarrow jj$ angular distributions at LHC: $M_T > 6.8$ TeV (CMS after $2.6 fb^{-1}$ of integrated luminosity) and $M_T > 8.3$ TeV (ATLAS after $3.6 fb^{-1}$). I also compare such limits to the ones obtained using the full graviton amplitude, and discuss the impact of additional constrains arising from other datasets, such as Mono-Jet.