Investigating top tagging with Ym-Splitter and N-subjettiness

We study top-tagging from an analytical QCD perspective focussing on the role of two key steps therein: a step to find three-pronged substructure and a step that places constraints on radiation. For the former we use a recently introduced modification of Y-Splitter, known as Y-m-Splitter, and for the latter we use the well-known N-subjettiness variable. We derive resummed results for this combination of variables for both signal jets and background jets, also including pre-grooming of the jet. Our results give new insight into the performance of top tagging tools in particular with regard to the role of the distinct steps involved.

Automated summary

This study explores top-tagging from an analytical QCD perspective, focusing on the role of finding three-pronged substructure and placing constraints on radiation. Utilizing Y-m-Splitter and N-subjettiness variable, resummed results for signal jets and background jets are derived, offering new insights into the performance of top tagging tools regarding the distinct steps involved.