Resonance Production in Jet

TL;DR

This paper investigates using jet-selected resonances, specifically the $0$ meson, in heavy-ion collisions to probe the early stages of the quark-gluon plasma formation, aiming to detect signs of chiral symmetry restoration.

Contribution

It proposes a novel technique of selecting resonances from jets to access early-stage signals in heavy-ion collisions, demonstrated with $0$ meson analysis in STAR data.

Findings

First attempt at jet-based resonance analysis in heavy-ion collisions.

Potential to extract early-stage medium information using resonance-jet correlations.

Indicates feasibility of using $0$ from jets to study chiral symmetry restoration.

Abstract

Hadronic resonances with short life times and strong coupling to the dense medium may exhibit mass shifts and width broadening as signatures of chiral symmetry restoration at the phase transition between hadronic and partonic matter. Resonances with different lifetimes are also used to extract information about the time evolution and temperature of the expanding hadronic medium. In order to collect information about the early stage (at the phase transition) of a heavy-ion collision, resonances and decay particles which are unaffected by the hadronic medium have to be used. We explore a possible new technique to extract signals from the early stage through the selection of resonances from jets. A first attempt of this analysis, using the reconstructed $\phi$(1020) from 200 GeV Au+Au collisions in STAR, is presented.