Light flavor hadron spectra at low-$p_{\rm T}$ and search for collective phenomena in high multiplicity pp, p-Pb and Pb-Pb collisions measured with the ALICE experiment

May 19, 2014, 12:00 PM
europium (darmstadtium)



Contributed Talk Collective Dynamics Collective dynamics


Cristian Andrei (IFIN-HH Bucharest (RO))


Comprehensive results on transverse momentum distributions, their ratios, d$N$/d$y$ and <$p_{\mathrm{T}}$> values for identified light flavor hadrons ($\pi$, K, p, $\Lambda$, $\Xi$, $\Omega$) at low $p_{\mathrm{T}}$ and mid rapidity are reported for all collision systems at LHC energies: pp, p-Pb, Pb-Pb. It is well known that strong collective effects are observed in central Pb-Pb collisions as a particle mass dependent hardening of the spectral shapes attributed to hydrodynamical flow and may be quantitatively parametrized with Boltzmann-Gibbs Blast Wave fits. In this talk, we investigate the existence of collective phenomena in small systems: pp, p-Pb and peripheral Pb-Pb where similar patterns are observed in multiplicity dependent studies. For pp collisions, measurements at three center-of-mass energies ($\sqrt{s} = $ 0.9, 2.76, 7 TeV) are presented and the evolution of the spectral shape with $\sqrt{s}$ is discussed.
On behalf of collaboration: ALICE

Primary author

Cristian Andrei (IFIN-HH Bucharest (RO))

Presentation materials