IPM Calendar 
Friday 9 May 2025   Today  
Events for day: Monday 25 December 2023    
           11:00 - 12:00     Journal Club: Experiment & Phenomenology – meeting
Hyperon Polarization along the Beam Direction Relative to the Second and Third Harmonic Event Planes in Isobar Collisions at
sNN=200 GeV

School
PARTICLES AND ACCELERATORS

Abstract:

The polarization of ? and ?¯ hyperons along the beam direction has been measured relative to the second and third harmonic event planes in isobar Ru+Ru and Zr+Zr collisions at sNN????? = 200 GeV. This is the first experimental evidence of the hyperon polarization by the triangular flow originating from the initial density fluctuations. The amplitudes of the sine modulation for the second and third harmonic results are comparable in magnitude, increase from central to peripheral collisions, and show a mild pT dependence. The azimuthal angle dependence of the polarization follows the vorticity pattern expected due to el ...