Speaker
Description
The NA61/SHINE experiment at the CERN SPS has recently extended its
program for the energy scan with Pb ions. In the past, the NA49
experiment, which preceded NA61/SHINE, also recorded data for
Pb-Pb collisions at different energies. Together, the two experiments
cover a wide range of beam energies provided by the CERN SPS in the range 13 - 150 A GeV/c. Analysis of the new NA61/SHINE data and reanalysis of the existing NA49 data
using modern measurement techniques allow for a new comprehensive
systematic study of collective flow relative to the spectator plane. The measurements at the lowest energy available at the SPS are also
relevant for the preparation of the Compressed Baryonic Matter (CBM)
heavy-ion experiment at the future FAIR facility in Darmstadt.
We will present new NA61/SHINE results on directed and elliptic flow
measurement in Pb-Pb collisions at 13 and 30A GeV/c relative to the
spectator plane determined with the Projectile Spectator Detector. Also
a new analysis of 40A GeV data collected by the NA49 experiment using
forward spectator calorimeters (VETO and RCAL) will be shown. The flow
coefficients are reported as a function of rapidity and transverse
momentum in different classes of collision centrality. The new results
are compared with existing results from the previous NA49 analysis and
the STAR experiment at RHIC.
