# ICHEP 2020

28 July 2020 to 6 August 2020
virtual conference
Europe/Prague timezone

## Heavy-flavour correlations, jets and multiplicity dependent studies on heavy-flavour hadrons in small systems with ALICE

28 Jul 2020, 16:45
25m
virtual conference

#### virtual conference

Talk 06. Strong Interactions and Hadron Physics

### Speaker

Marianna Mazzilli (Universita e INFN, Bari (IT))

### Description

In this contribution, the latest heavy-flavour results on the pp
and p--Pb data samples collected during the LHC Run 2 with ALICE at several center-of-mass energies will be presented.
A comprehensive study of the multiplicity dependent open heavy-flavour hadron production and quarkonium self-normalised yields in pp collisions at $\sqrt{s}$ = 13 TeV will be shown. Such measurements constitute a valuable tool to characterize Multi-Parton Interactions (MPI), as well as the interplay between hard and soft particle production mechanisms. In particular, these studies include $\psi$(2S) production at forward rapidity, while multiplicity dependent measurements at mid-rapidity will be discussed for D mesons, heavy-flavour decay electrons and inclusive J/$\psi$.
Moreover, the multiplicity dependent self-normalised yields of
heavy-flavour decay electrons at mid-rapidity, as well as $v_{2}$ measurements in high-multiplicity events for heavy-flavour decay muons at forward rapidity, will be discussed. Such studies aim to investigate possible collective effects in p—Pb collisions. In addition, measurements of heavy-flavor jet production and fragmentation and heavy-flavour correlations will be presented. These studies give direct access to the initial parton kinematics and allow us to characterize the heavy-quark fragmentation process, as well as to gain information on heavy-quark production mechanisms in pp collisions. Heavy-flavour jets studies are
extended to heavy-flavour hadron decay electrons and D-meson tagged charged jets measurements in pp and p--Pb collisions at $\sqrt{s}=5.02$ and $13$ TeV and $\sqrt{s_{\rm NN}}=5.02$ TeV, respectively. The results of the jet-momentum fraction carried by the D meson at $\sqrt{s}=5.02$ and $13$ TeV and by the $\Lambda_{\rm c}$ baryon at $\sqrt{s}=13$ TeV will be discussed as well. The angular correlations of D-mesons and charged particles in pp and p--Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV will be shown and comparison with model calculations will be discussed.

### Primary author

Marianna Mazzilli (Universita e INFN, Bari (IT))