Searching for $Z'$ bosons decaying to gluons

TL;DR

This paper explores a hypothetical heavy vector boson called a chromophilic $Z'$ that interacts only with gluons, predicts its production and decay modes, and proposes methods to detect it in current collider data.

Contribution

It introduces the concept of a chromophilic $Z'$ boson, analyzes its unique decay channels, and develops reconstruction techniques for experimental searches.

Findings

Cross-section increases with $m_{Z'}$ at fixed coupling.

Proposed methods for detecting $Z' o tar{t}g$ in collider data.

Estimated sensitivity of current datasets to this new boson.

Abstract

The production and decay of a new heavy vector boson, a chromophilic $Z'$ vector boson, is described. The chromophilic $Z'$ couples only to two gluons, but its two-body decays are absent, leading to a dominant decay mode of $Z'\rightarrow q\bar{q}g$. The unusual nature of the interaction predicts a cross-section which grows with $m_{Z'}$ for a fixed coupling and an accompanying gluon with a coupling that rises with its energy. We study the $t\bar{t}g$ decay mode, proposing distinct reconstruction techniques for the observation of an excess and for the measurement of $m_{Z'}$. We estimate the sensitivity of current experimental datasets.