13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

Elliptic flow coefficients of identified hadrons in pp and p-Pb collisions measured with ALICE

14 May 2018, 16:30
20m
Sala Mosaici-1, 3rd Floor (Palazzo del Casinò)

Sala Mosaici-1, 3rd Floor

Palazzo del Casinò

Parallel Talk Collectivity in small systems Collectivity in small systems

Speaker

Vojtech Pacik (University of Copenhagen (DK))

Description

Recent observations of long-range multi-particle azimuthal correlations in p-Pb and high multiplicity pp collisions provided new insights into collision dynamics and opened a possibility to study collective effects in these small systems.
In this talk, we present new measurements of $p_{\text{T}}$-differential elliptic flow coefficient $v_2$ for a variety of identified charged hadrons from pp and p-Pb collisions recorded by ALICE during the LHC Run 2 operation. The results for $v_2(p_{\text{T}})$ measured for $\pi^{\pm}$, $\text{K}^{\pm}$, $\text{K}^0_{\text{S}}$, p/$\bar{\text{p}}$, $\phi$ and $\Lambda/\bar{\Lambda}$ in p-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV are shown. Minimum-bias pp collisions are used to estimate and subtract the non-flow contribution in p-Pb measurements. Additionally, we present first measurements of $v_2$ of identified particles in pp collisions at $\sqrt{s}$ = 13 TeV.
The $p_{\text{T}}$ dependence, characteristic mass ordering and number of constituent quark scaling of $v_2$ allows us to test various theoretical models, constrain the initial conditions, and probe collective effects in small collision systems. Measurements of the $v_2$ of the $\phi$-meson, in particular, given it features a mass close to that of the proton, provide an opportunity to examine the particle production mechanism via quark recombination scenario.

Content type Experiment
Centralised submission by Collaboration Presenter name already specified
Collaboration ALICE

Primary author

Presentation Materials