Study of Strange Particle Production in Central Pb–Pb Collisions at

We study here the transverse momentum spectra of Ks 0 – mesons, A − hyperons and multi–strange (Ξ–, Ω–) particles in the most central Pb–Pb collisions at √SNN = 2.76 TeV for the mid rapidity interval |y| < 0.5 by using two different Monte Carlo simulation models: EPOS–1.99 and EPOS–LHC. The validity of simulation codes of these models is checked for Pb–Pb collisions at √SNN = 2.76 TeV by comparing the simulation data with ALICE experimental data for the same collisions at √SNN = 2.76 TeV. Strange particles ratio i.e. and nuclear modification factors for multi–strange particles have been constructed as function of pT to study these strange particle production and their energy loss mechanism. The simulation models show suppression for the multi–strange particles in the transverse momentum range of 3–7 GeV/c. The outcome agrees with a recent finding by ALICE collaboration where it suggested a possibility that the kinetic freeze–out conditions for strange particles are different from those for non–strange particles

Rope Hadronization and Strange Particle Production

Rope Hadronization is a model extending the Lund string hadronization model to describe environments with many overlapping strings, such as high multiplicity pp collisions or AA collisions. Including effects of Rope Hadronization drastically improves description of strange/non-strange hadron ratios as function of event multiplicity in all systems from e+e− to AA. Implementation of Rope Hadronization in the MC event generators Dipsy and Pythia8 is discussed, as well as future prospects for jet studies and studies of small systems.

Energy and multiplicity dependence of strange and non-strange particle production in proton-proton collisions at the LHC with ALICE

The study of energy and multiplicity dependence of hadron production in proton-proton collisions provides a powerful tool to understand similarities and differences between small and large colliding systems. In this work we present mid-rapidity measurements of the pT spectra and yields of identified hadrons, namely pions, kaons, protons, K0S, Ξ, Ω and in pp collisions at √s = 7 and 13 TeV. The comparison of results at √s = 13 TeV to earlier results at 7 TeV provides insights about the energy dependence of the strangeness enhancement. Comparisons between data and expectations from commonly-used Monte Carlo event generators will be presented.