Jet Studies in STAR via Di-jet Triggered (2+1) Multi-hadron Correlations

TL;DR

This study uses a novel multi-hadron correlation technique to investigate jet-medium interactions in heavy-ion collisions, revealing minimal energy loss in symmetric di-jet configurations contrary to model predictions.

Contribution

It introduces the '2+1' multi-hadron correlation method to analyze jet quenching and compares di-jet systematics in different collision systems at 200 GeV.

Findings

Little to no energy loss observed in symmetric '2+1' scenario

Associated particle yields and spectra differ between Au+Au and d+Au collisions

Sum(pT) suggests less energy loss than predicted by models

Abstract

We explore jet-medium interactions via the recently developed multi-hadron correlation or "2+1" technique. We restrict the di-jet kinematics by selecting a pair of approximately back-to-back high pT hadron triggers and study associated particles. Here we present our study of di-jet systematics comparing the measurements of associate yields and spectra in 200 GeV Au+Au and d+Au collisions in two different scenarios. We present Sum(pT) as an estimate for energy loss. First findings indicate little to no energy loss in the symmetric "2+1" scenario whereas model predictions are about 2 GeV.