Multiplicity dependence of intra-jet properties in pp collisions at $\sqrt{s}$ = 13 TeV with ALICE

TL;DR

This paper investigates how intra-jet properties in proton-proton collisions at 13 TeV depend on event multiplicity, revealing potential insights into quark-gluon plasma-like effects in small systems.

Contribution

It presents the first measurements of multiplicity dependence of charged-particle jet properties in pp collisions at 13 TeV, using the ALICE detector.

Findings

Charged-particle multiplicity varies with event multiplicity.

Fragmentation functions show modifications with multiplicity.

Jet properties are studied across a wide transverse momentum range.

Abstract

Recent results in high-multiplicity pp collisions show features similar to those that are associated with the formation of a quark$-$gluon plasma in heavy-ion collisions. Investigating the modification of the intra-jet properties as a function of event multiplicity in pp collisions can provide deeper insight into the nature of these effects. We will present the recent measurements of multiplicity dependence of charged-particle jet properties (average charged particle multiplicity and fragmentation functions) for leading charged-particle jets. Jets are reconstructed using anti-$k_{\rm T}$ jet finding algorithm with radius parameter $R$ = 0.4 in the jet $p_{\rm T}$ range from 5$-$110 GeV/$c$ at midrapidity in pp collisions at $\sqrt{s}$ = 13 TeV with ALICE.