Identification of the Origin of Monojet Signatures at the LHC

TL;DR

This paper compares monojet signatures from unparticle physics and extra-dimensional models at the LHC, demonstrating how their differing event distributions can help identify the underlying new physics.

Contribution

It introduces a method to distinguish between unparticle and graviton emission scenarios using monojet and missing energy distributions at the LHC.

Findings

Monojet distributions differ significantly between models.

Distinguishing features are observable within certain parameter ranges.

The approach aids in identifying the origin of potential new physics signals.

Abstract

Several new physics scenarios can lead to monojet signatures at the LHC. If such events are observed above the Standard Model background it will be important to identify their origin. In this paper we compare and contrast these signatures as produced in two very different pictures: vector or scalar unparticle production in the scale-invariant/conformal regime and graviton emission in the Arkani-Hamed, Dimopoulos and Dvali extra-dimensional model. We demonstrate that these two scenarios can be distinguished at the LHC for a reasonable range of model parameters through the shape of their respective monojet and/or missing $E_T$ distributions.