Top Quark Properties

TL;DR

This paper discusses recent experimental limits on four-top production at the LHC and explores new methods for directly measuring the top-quark width using advanced $b$-jet charge tagging algorithms.

Contribution

It highlights recent constraints on top-quark operators and introduces novel approaches for measuring the top-quark width through improved charge tagging techniques.

Findings

Competitive constraints on four-top production signal strength.

Potential for direct top-quark width measurement with $b$-jet charge tagging.

Advances in $b$-jet charge tagging algorithms.

Abstract

Recently, experimental collaborations have reported $\mathcal{O}(10)$ upper limits on the signal strength of four-top production at the LHC, which already leads to competitive constraints on certain type of top-quark operators. On the other hand, developments in the $b$-jet charge tagging algorithms open up new possibilities for the direct measurement of the top-quark width. In this talk, we briefly discuss some recent studies in these two directions.