QM 2022

A Simple Geometrical Model for p+p and Nucleus-nucleus Collisions, and its Comparison to Experimental Data on Small and Large Systems

6 Apr 2022, 18:50

4m

Poster QGP in small and medium systems Poster Session 2 T05 / T13

Speaker

Lukasz Rozplochowski (Institute of Nuclear Physics Polish Academy of Sciences)

Description

The aim of this work was to investigate the properties of a new, simple model of the nucleus+nucleus collisions at high energy, and its applicability to the CERN SPS energy regime. The model was uniquely based on the system's geometry and local energy and momentum conservation in the quark gluon plasma produced in the reaction.

We studied Pb+Pb collisions at $\sqrt{s_{NN}}$ = 17.3 GeV and 8.8 GeV, and obtained a surprisingly good agreement between our model and the experimental data (rapidity spectra) collected by the NA49 experiment at CERN SPS as a function of centrality. Furthermore, we applied this model to the nucleon+nucleon (N+N) collisions by taking into account the changes in the overall energy balance between the Pb+Pb and N+N system (baryon stopping, strangeness enhancement, and isospin content). The obtained results again display a very good agreement between the model prediction and experimental rapidity distributions in proton+proton collisions measured by the NA49 and NA61/SHINE Collaborations. This shows that our approach is applicable also for small systems in the CERN SPS energy range.

A discussion of future applications of this model to small and large systems at LHC energies will be included in this poster.

References:

Ł. Rozpłochowski, Acta Phys. Polon. Supp. 13 (2020) 893, and references therein

Presentation materials

QM2022_poster_Rozpłochowski.pdf