Axigluon Couplings in the Presence of Extra Color-Octet Spin-One Fields

TL;DR

This paper investigates how introducing extra color-octet spin-one fields alters axigluon-quark interactions, suggesting that the non-observation of axigluons at colliders may be due to weaker couplings rather than higher masses.

Contribution

It demonstrates that additional color-octet fields can weaken axigluon couplings, challenging previous assumptions about their non-observability based solely on mass limits.

Findings

Axigluon-quark coupling strength can be significantly reduced.

Non-observation at Tevatron may be due to weaker couplings, not higher masses.

The model reinterprets experimental limits on axigluons.

Abstract

In this paper, we study how the interaction of the axigluon with quarks is modified when we introduce new color-octet spin-one fields in a chiral color model. We show that in this case the strength of this interaction is not completely determined by the gauge symmetry any more and can be significantly weaker than the one predicted in the original chiral color model. In this way, we reinterpret the non-observability of the axigluon at the Tevatron, not as a limit on the axigluon mass, but as a limit on the strength of the axigluon coupling to quarks.