Quark Matter 2023

New measurements of inclusive jet RAA with mixing technique and jet v2 properties with ALICE

5 Sept 2023, 11:40

20m

Ballroom F (Hilton of the Americas)

Oral Jets Jets

Speaker

Nadine Alice Gruenwald (Heidelberg University (DE))

Description

This talk presents new measurements of inclusive jet yield suppression and correlation with event-plane orientation to elucidate the kinematic and path-length dependence of jet energy loss due to quenching. We report measurements of the inclusive charged-particle jet yield in central Pb--Pb collisions, with the large uncorrelated background mitigated using a novel event mixing technique. This approach extends the jet $R_{\mathrm{A}\mathrm{A}}$ to lower jet $p_{\mathrm{T}}$ than previously achievable, providing significant kinematic overlap with RHIC jet measurements.
In addition to explorations of the low-$p_{\mathrm{T}}$ frontier, we report the inclusive charged-particle jet $v_2$ in semi-central Pb--Pb collisions, thereby quantifying the yield dependence relative to the event-plane orientation and probing the pathlength dependence of jet energy loss. We also report more differential measurements of this azimuthal dependence by using event-shape engineering to select specific event topologies, and the jet substructure observable $R_{\mathrm{g}}$ to select specific jet topologies. Such measurements improve our understanding of how jet suppression depends on both medium and jet properties.
These results are compared to theoretical calculations, thus providing new insights into jet-quenching phenomenology and its underlying mechanisms.

Presentation materials

QM2023_NadineGruenwald.pdf

Peer reviewing

Paper

Accepted on 25 Jan 2024 by Frank Geurts

QM2023_Proceedings_25Jan2024.pdf