Search for walking technipion in four-jet sample

TL;DR

This paper explores methods to detect a potential 750 GeV pseudoscalar technipion signal in four-jet events by optimizing jet selection cuts and analyzing correlations to improve the signal-to-background ratio.

Contribution

It proposes a specific jet selection strategy and kinematic cuts to enhance the detection of a 750 GeV pseudoscalar technipion in four-jet samples, including analysis of jet correlations.

Findings

Optimal cuts involve two soft, large-rapidity jets and two hard, mid-rapidity jets.

Azimuthal correlations can further improve signal detection.

Differential distributions and event counts are provided for various cuts.

Abstract

We discuss how to search for a possibe signal of the recently observed 750 GeV enhancement in the diphoton channel in the four-jet production. In the present studies we assume that the produced state is pseudoscalar. This fact, when combined with specificity of the corresponding amplitude, allows to improve the signal-to-background (S/B) ratio. We discuss in detail how to impose cuts on jets in rapidity and transverse momenta in order to find optimal S/B ratio and not to loose too much statistics. Our study suggest a measurement of two soft (low cut on $p_t$) large-rapidity jets and two hard (high cut on $p_t$) mid-rapidity jets. Azimuthal correlation between the soft external jets may be useful to further improve the situation. Several differential distributions in rapidities and transverse momenta of jets as well as dijet invariant mass are shown. The integrated cross sections corresponding to different cuts are collected in a table and number of events are presented.