Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

Multiplicity-dependent jet shape analysis in pp collisions at s = 13 TeV with ALICE

4 Nov 2019, 17:40

20m

Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Small systems Poster Session

Speaker

Zoltan Varga (Hungarian Academy of Sciences (HU), ALICE)

Description

High-multiplicity pp collisions show similar collective behavior as found in heavy-ion collisions with comparable event multiplicity, such as long-range near-side correlations and the $v_n$ coefficients. In pp collisions, these effects may be caused by multiple-parton interactions or other vacuum QCD effects. Investigating the modification of the jet shape in terms of the event multiplicity can provide us with deeper insights on the nature of these effects.

In this contribution, we report on the latest results concerning the jet-shape measurements of the jet radial profile and first radial moment (or girth) and their multiplicity dependence in pp collisions at $\sqrt{\mathit{\text{s}}}$ = 13 TeV with ALICE. The jet radial profile describes the energy distribution inside the jet cone while the first radial moment provides complementary information on the jet fragmentation properties. Multiplicity-differential measurements provide important input to understand the interplay between jet fragmentation and event multiplicity in small colliding systems.