Recent high-pt results from STAR

TL;DR

This paper reports recent results from the STAR experiment on multi-hadron correlations at intermediate and high transverse momentum in Au+Au collisions, aiming to understand jet quenching and the origin of near-side correlations.

Contribution

It introduces new multi-hadron correlation measures using di-hadron and multi-hadron cluster triggers to better constrain jet kinematics in heavy ion collisions.

Findings

Observation of near-side yield at large pseudorapidity difference.

New correlation measures at high- extit{p}_T to analyze jet properties.

Insights into the origin of correlated particle production in heavy ion collisions.

Abstract

We present selected recent results of multi-hadron correlation measurements in azimuth and pseudorapidity at intermediate and high \pt{} in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV, from the STAR experiment at RHIC. At intermediate \pt, measurements are presented that attempt to determine the origin of the associated near-side (small \dphi) yield at large pseudo-rapidity difference \deta{} that is found to be present in heavy ion collisions. In addition, results are reported on new multi-hadron correlation measures at high-\pt{} that use di-hadron triggers and multi-hadron cluster triggers with the goal to constrain the underlying jet kinematics better than in the existing measurements of inclusive spectra and di-hadron correlations.