$t\rightarrow \gamma$ decay in the ACD model

TL;DR

This paper investigates the impact of a single extra spatial dimension on top quark flavor-changing neutral current decays, finding that such models do not significantly enhance the decay rates beyond the Standard Model predictions.

Contribution

It provides the first estimation of top quark FCNC decay rates within the one-extra-dimension model, demonstrating the limitations of this extension in increasing decay probabilities.

Findings

Extra dimension models with one additional spatial dimension do not increase top FCNC decay branching ratios.

Standard Model predictions remain valid within the examined extra dimension framework.

The study constrains the potential effects of single extra dimensions on top quark decays.

Abstract

In the presented paper we have estimated additional to the standard model (SM) contributions to the top quark FCNC decays in the framework of the model with one extra dimension. The estimates of performed calculations show that extra dimension models with only one additional spatial dimension cannot raise branching ratio for top FCNC decay.