Top quark chromomagnetic dipole moment in the littlest Higgs model with T-parity

TL;DR

This paper calculates the one-loop contributions of new particles predicted by the littlest Higgs model with T-parity to the top quark's chromomagnetic dipole moment, finding it significantly smaller than the Standard Model prediction.

Contribution

It provides the first detailed calculation of the top quark CMDM within the LHT model, highlighting its suppressed magnitude compared to the Standard Model.

Findings

LHT contributions to top quark CMDM are an order of magnitude smaller than SM predictions.

New particles in LHT have a negligible effect on top quark CMDM.

The results constrain the impact of LHT on top quark properties.

Abstract

The littlest Higgs model with T-parity, which is called $LHT$ model, predicts the existence of the new particles, such as heavy top quark, heavy gauge bosons, and mirror fermions. We calculate the one-loop contributions of these new particles to the top quark chromomagnetic dipole moment $(CMDM)$ $\Delta K$. We find that the contribution of the $LHT$ model is one order of magnitude smaller than the standard model prediction value.