Speaker
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).
| Preferred Track | Jets and High pT Hadrons |
|---|---|
| Collaboration | STAR |
