Event-level variables for semivisible jets using anomalous jet tagging

TL;DR

This paper introduces new event-level variables based on anomalous jet tagging that enhance the detection sensitivity for semivisible jets, a signature of dark sectors, by utilizing overlooked kinematic information.

Contribution

It proposes a novel method to define event-level variables from anomalous jet tagging, improving dark sector discovery potential.

Findings

New variables increase detection significance for semivisible jets.

Decomposition coefficients of missing transverse momentum are effective discriminators.

Benchmark analysis shows improved sensitivity over traditional methods.

Abstract

Semivisible jets are a characteristic signature of many confining dark sectors and consist of jets of visible hadrons intermixed with invisible stable particles. Since their initial proposal, considerable progress has been made in developing techniques for tagging anomalous jets. In this paper, we show that the ability to tag semivisible jets can be used to define new event-level variables which use generally ignored kinematic information and can considerably increase our ability to discover dark confining sectors. In practice, our best results are obtained by using the coefficients of the decomposition of the missing transverse momentum in terms of the transverse momenta of the jets tagged as anomalous. A benchmark scenario is introduced and the increase in significance due to these new variables is studied over some of its parameter space.