16th Workshop on Critical Point and Onset of Deconfinement

News on (charged and neutral) hadron production in central nucleus-nucleus collisions from NA61/SHINE at the CERN SPS

Not scheduled

20m

503/1-001 - Council Chamber (CERN)

Oral Phase Transition

Speakers

Oleksandra Panova (Jan Kochanowski University (PL)) Yuliia Balkova (National Centre for Nuclear Research (PL))

Description

NA61/SHINE is a multipurpose fixed-target experiment located at the CERN SPS. One of its main goals is to study the onset of deconfinement and the properties of strongly interacting matter. For this purpose, a unique two-dimensional scan in collision energy (√sNN = 5.1 − 16.8/17.3 GeV) and system size was performed.
Results on hadron spectra produced in nucleus-nucleus collisions, including the recent results for the charged hadrons produced in central Xe+La collisions, which completes the two-dimensional scan, and Λ baryons in central Ar+Sc collisions will be presented. The kinematic distributions and the measured multiplicities of identified hadrons will be compared with NA49 Pb+Pb results, as well as with available world data. The obtained results, particularly the K⁺/π⁺, Λ/π, and total strangeness-to-pion ratios, are crucial for understanding the phenomena of the onset of deconfinement and the onset of fireball, which is one of the main aims of the strong interaction program of the NA61/SHINE collaboration.
Additionally, a comparison of proton rapidity spectra in nucleus-nucleus collisions from NA61/SHINE and NA49 will be presented, providing a complete picture of the energy and system size dependence of the mechanism of transport of baryon number at SPS energies.