Mass limits for the chiral color symmetry $G'$-boson from LHC dijet data

TL;DR

This paper analyzes the constraints on the mass and mixing angle of the hypothetical $G'$-boson from LHC dijet data, providing exclusion limits and parameter space regions consistent with experimental results.

Contribution

It offers the first detailed analysis of $G'$-boson mass limits from LHC dijet data considering the chiral color symmetry model with two free parameters.

Findings

Excludes $G'$-boson masses below 2.3-3.35 TeV depending on parameters.

Provides $68\\%$ and $90\\\%$ confidence level regions for model parameters.

Shows more stringent limits for non-axigluon $G'$-boson configurations.

Abstract

The contributions of $G'$-boson predicted by the chiral color symmetry of quarks to the differential dijet cross-sections in $pp$-collisions at the LHC are calculated and analysed in dependence on two free parameters of the model, the $G'$ mass $m_{G'}$ and mixing angle $\theta_G$. The exclusion and consistency $m_{G'}-\theta_G$ regions imposed by the ATLAS and CMS data on dijet cross-sections are found. Using the CT10 (MSTW~2008) PDF set we show that the $G'$-boson for $\theta_G=45^{\circ}$, i.e. the axigluon, with the masses $m_{G'} < 2.3 \,\, (2.6) \,\, \mbox{TeV}$ and $m_{G'} < 3.35 \,\, (3.25) \,\, \mbox{TeV}$ is excluded at the probability level of $95\%$ by the ATLAS and CMS dijet data respectively. For the other values of $\theta_G$ the exclusion limits are more stringent. The $m_{G'}-\theta_G$ regions consistent with these data at $CL=68\%$ and $CL=90\%$ are also found.