Multiplicity fluctuations in Ar+Sc collisions at the CERN SPS from NA61/SHINE

Understand

Multiplicity fluctuations were investigated in Ar+Sc collisions at 13A, 19A, 30A, 40A, 75A, 150A GeV/c using the NA61/SHINE detector at the SPS.

• Centrality selection is based on the nucleon-spectator energy in the forward hemisphere as measured by the Projectile spectator detector.
• Preliminary results on the scaled variance {\omega} and the strongly intensive measure {\Omega} were obtained for the multiplicity distribution of all, negatively and positively charged hadrons.
• Results are discussed and compared with p+p results and Pb+Pb data of NA49 and EPOS 1.99 simulations.