Dijet Signature of Low Mass Strings in the Early LHC Data

TL;DR

This paper explores how low mass string theories could be detected at the LHC through dijet resonance signatures, showing that a string scale around 5 TeV can be probed with minimal data.

Contribution

It demonstrates the potential of early LHC data to discover string excitations by analyzing dijet invariant mass distributions for the first time.

Findings

LHC can probe string scales up to ~5 TeV with 2 pb$^{-1}$ of data.

String effects could manifest as new resonances in dijet spectra.

Separate analysis of quark-gluon and gluon-gluon subprocesses enhances detection prospects.

Abstract

We have examined the dijet production at the LHC as a hint to discovery of string Regge excitations of Standard Model particles. If the fundamental string mass scale is in the TeV range, the influence of string effects on the $pp$ interaction can arise as new resonances in the dijet invariant mass distribution. Near the first resonant pole we investigate the impact of the subprocesses with quark-gluon and four-gluon separately. We show that the LHC is able to probe the string mass scale $\sim$5 TeV with only 2 pb$^{-1}$ of integrated luminosity at $E_{CM}=14$ TeV.