Dijet angular distributions at $\sqrt{s}=14$ TeV

TL;DR

This paper analyzes dijet angular distributions at 14 TeV using NLO QCD calculations and explores potential signals of new physics like extra dimensions and black hole formation, assessing systematic uncertainties and discovery prospects.

Contribution

It provides a detailed NLO QCD study of dijet angular distributions and investigates the impact of models with large extra dimensions on these distributions.

Findings

NLO QCD calculations show distribution variations across mass bins.

Systematic uncertainties from PDFs and scales are quantified.

Potential to discover extra-dimensional effects at 14 TeV with early LHC data.

Abstract

We present a Monte Carlo study of dijet angular distributions at $\sqrt{s}=14$ TeV. First we perform a next-to-leading order QCD study; we calculate the distributions in four different bins of dijet invariant mass using different Monte Carlo programs and different jet algorithms, and we also investigate the systematic uncertainties coming from the choice of the parton distribution functions and the renormalization and factorization scales. In the second part of this paper, we present the effects on the distributions coming from a model including gravitational scattering and black hole formation in a world with large extra dimensions. Assuming a 25% systematic uncertainty, we report a discovery potential for the mass bin $1 < M_{jj} < 2$ TeV at 10 pb$^{-1}$ integrated luminosity.