# Quark Matter 2017

Feb 5 – 11, 2017
Hyatt Regency Chicago
America/Chicago timezone

## Di-jet Hadron Correlations In Central Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV at STAR

Not scheduled
2h 30m
Hyatt Regency Chicago

#### Hyatt Regency Chicago

151 East Wacker Drive Chicago, Illinois, USA, 60601
Board: D16
Poster

### Speaker

Nicholas Elsey (Wayne State University)

### Description

Jets and their modifications due to partonic energy loss provide a powerful tool to study the properties of the QGP created in
ultrarelativistic heavy-ion collisions. For anti-$k_t$ jets with a resolution parameter $R=0.4$, previous
measurements of the di-jet asymmetry $A_J$ at STAR [1] indicate that the observed imbalance of an initial hard-core" di-jet selection with $\mathrm{p_T^{constituent}} > 2.0$ GeV/c, $\mathrm{p_T^{lead jet}>20.0}$ GeV/c and $\mathrm{p_T^{subjet}>10.0}$ GeV/c is restored to the balance of the pp reference when soft constituents are included.
The lost energy is recovered in soft constituents within the jet radius.

Jet-hadron correlations with respect to the $A_J$ di-jets allow a differential assessment of the kinematic properties of the soft gluon radiation spectrum induced by partonic energy loss in the QGP. We present charged hadron correlations with respect to the di-jets found in the above $A_J$ analysis, and compare to similar measurements using a single-jet trigger [2] at RHIC, as well as to jet-track correlations at the LHC.

[1] L.Adamczyk $et$ $al.$ [STAR Collaboration], arXiv:1609.03878 [nucl-ex].

[2] L.Adamczyk $et$ $al.$ [STAR Collaboration], Phys. Rev. Lett. 112, 122301 (2014).

Collaboration STAR Jets and High pT Hadrons

### Primary author

Nicholas Elsey (Wayne State University)