Quark Matter 2018

Studies of jet grooming and recursive splittings in pp and PbPb collisions with ALICE

15 May 2018, 12:10

20m

Sala Perla, 1st Floor (Palazzo del Casinò)

Parallel Talk Jet modifications and high-pT hadrons Jet modifications and high-pT hadrons

Speaker

Harry Arthur Andrews (University of Birmingham (GB))

Description

Hard splittings in the evolution of a jet may be modified by the presence of a dense strongly interacting medium. Grooming procedures can be used to isolate such hard components of a jet and allows one to focus on the two subjets resulting from a sufficiently hard partonic splitting. The modification of these splittings in medium could highlight the role of jet induced medium response as well as potential single hard scatterings (higher-twist) and multiple soft medium induced radiation (BDMPS).
Measurements of the symmetry parameter ($z_g$) and angular separation of such subjets are reported as measured with the ALICE Detector in pp and PbPb collisions at $\sqrt{s}=7$ TeV and $\sqrt{s_{NN}}=2.76$ TeV respectively. Results are compared to predictions using Monte Carlo generators. The use of recursive splittings and their mappings to identify interesting regions of phase space will also be discussed with comparisons made between Monte Carlo generators and data in pp and PbPb collisions.

Presentation materials

HarryAndrews_QuarkMatter18Final.pdf