Four Jets as a Probe of O(100 GeV) Physics beyond Standard Model at Hadron Colliders

TL;DR

This paper explores the potential to detect a new color-octet axial-vector particle Z_C, around 145 GeV, through four-jet final states at hadron colliders, despite significant QCD background challenges.

Contribution

It proposes a novel method to identify Z_C pair production via four-jet analysis, highlighting the feasibility at Tevatron and LHC with current data.

Findings

Tevatron and LHC can potentially discover Z_C in four-jet events

Simulation indicates promising detection prospects despite QCD background

Z_C may explain anomalies in top quark asymmetry and di-jet bumps

Abstract

O(100 GeV) physics beyond the standard model (BSM) could be overlooked provided that it is hidden in the untouched Higgs sector or jets. The top quark forward-backward asymmetry measurements and di-jet bump, which is observed in the associated production with charged lepton plus missing energy (supposed arising from W decay), may indicate the existence of a new color-octet axial-vector Z_C with a mass about 145 GeV. Here Z_C only decays into two jets. In this paper we investigated the possibility to discover Z_C pair via analyzing the four jets as the final states, which are heavily polluted by huge QCD background. Our simulation showed that, however, both Tevatron and LHC have the excellent chance to discover Z_C through analyzing the four jets events in the current accumulated data.