10-17 July 2019
Ghent
Europe/Brussels timezone

Multiplicity and centre-of-mass energy dependence of light-flavor hadron production in pp, p-Pb, and Pb-Pb collisions with ALICE

11 Jul 2019, 14:48
18m
ICC - Baeckeland 1 (Ghent)

ICC - Baeckeland 1

Ghent

Parallel talk Heavy Ion Physics Heavy Ion Physics

Speaker

Ivan Ravasenga (National Academy of Sciences of Ukraine (UA))

Description

The study of identified hadron production as a function of event multiplicity is a key tool for understanding the similarities and differences between large and small colliding systems.
The multiplicity-dependence of the total yields of identified hadrons as a function of event activity shows a remarkable scaling that covers all the collision systems considered.
The production rates of strange and multi-strange hadrons show enhancement patterns, which are not consistently captured by commonly-used Monte Carlo generators. To isolate the center-of-mass energy dependence, pp and Pb--Pb collisions have been measured at two different energies. We find that hadrochemistry is dominantly driven by the multiplicity in hadronic collisions at LHC energies, and not the colliding system or the center-of-mass energy.
We report on the production of pions, kaons, protons, K$^{0}_{\textrm{S}}$, $\Lambda$, $\Xi$ and $\Omega$ measured in pp ($\sqrt{s} = 7$ and $13$ TeV), p--Pb ($\sqrt{s_{\textrm{NN}}} = 5.02$ TeV) and Pb--Pb ($\sqrt{s_{\textrm{NN}}} = 2.76$ and $5.02$ TeV) collisions at the LHC. Results will be compared to predictions from hydrodynamic and statistical hadronization models.

Primary author

Presentation Materials