A Flavorful Top-Coloron Model

TL;DR

This paper proposes a renormalizable extended color gauge model with differentiated third-generation quark couplings, heavy color-octet bosons, and vector quarks, analyzing its experimental constraints and discovery potential at the LHC.

Contribution

It introduces a novel flavor-specific color gauge extension with heavy vector bosons and quarks, and explores its phenomenological implications.

Findings

Model is consistent with current flavor and collider constraints.

Small mixing between third and first two generations naturally occurs.

Potential signals at the LHC could reveal the new gauge sector.

Abstract

In this paper we introduce a simple renormalizable model of an extended color gauge sector in which the third-generation quarks couple differently than the lighter quarks. In addition to a set of heavy color-octet vector bosons (colorons), the model also contains a set of heavy weak vector quarks. Mixing between the third-generation of quarks and the first two is naturally small, and occurs only through the (suppressed) mixing of all three generations with the heavy vector quarks. We discuss the constraints on this model arising from limits on flavor-changing neutral currents and from collider searches for the colorons and vector quarks, and discuss the prospects for discovery at the LHC.