Dijet and electroweak limits on a $Z'$ boson coupled to quarks

TL;DR

This paper updates and extends the coupling-mass plot for a flavor-independent $Z'$ boson, comparing LHC dijet limits with electroweak and quarkonium constraints across a broad mass range, emphasizing anomaly cancellation effects.

Contribution

It provides an updated and extended coupling-mass plot for $Z'$ bosons from 5 GeV to 5 TeV, incorporating electroweak and quarkonium constraints and analyzing anomaly cancellation effects.

Findings

Updated coupling-mass plot for $Z'$ from 5 GeV to 5 TeV.

Demonstrated the impact of anomaly cancellation on $Z'$ mixing.

Compared LHC dijet limits with electroweak and quarkonium constraints.

Abstract

An insightful way of presenting the LHC limits on dijet resonances is the coupling-mass plot for a $Z'$ boson that has flavor-independent quark interactions. This also illustrates the comparison of low-mass LHC sensitivity with constraints on the flavor-independent $Z'$ boson from electroweak and quarkonium measurements. To derive these constraints, we compute the $Z'$ mixing with the $Z$, the photon, and the $\Upsilon$ meson, emphasizing the logarithmic dependence on the masses of the new electroweak-charged fermions (``anomalons") required to cancel the gauge anomalies. We update the coupling-mass plot, extending it for $Z'$ masses from 5 GeV to 5 TeV.