Dijet and electroweak limits on a $Z^{\prime }$ boson coupled to quarks

Abstract

An insightful way of presenting the LHC limits on dijet resonances is the coupling-mass plot for a $Z^{\prime }$ boson that has flavor-independent quark interactions. This also illustrates the comparison of low-mass LHC sensitivity with constraints on the flavor-independent $Z^{\prime }$ boson from electroweak and quarkonium measurements. To derive these constraints, we compute the $Z^{\prime }$ mixing with the $Z$, the photon, and the ${\rm Y}$ 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 $Z^{\prime }$ masses from 5 GeV to 5 TeV.

Comments: 33 pages, 4 figures; v2 updated figures with 13.6 TeV cross sections, matches published version