Polarisation in relativistic heavy-ion collisions
Seminars
VBLHEP Joint Laboratory Seminar
Date and Time: Friday, 28 October 2022, at 11:30 AM
Venue: online seminar on Zoom, the Veksler and Baldin Laboratory of High Energy Physics
Seminar topic: “Polarisation in relativistic heavy-ion collisions”
Speaker: Victor Riabov
Abstract:
The extreme temperatures and energy densities achieved in relativistic heavy-ion collisions result in production of partonic matter known as quark-gluon plasma. In the last decades, the hydrodynamics has become the dominant theoretical concept for theoretical study of such a state of matter. A large value of the angular momentum or development of pressure gradients in non-central heavy-ion collisions lead in hydrodynamics to the appearance of vorticity fields. The relationship between rotational degrees of freedom and quantum spin can lead to the polarisation of the produced particles. Experimental observation and theoretical description of particle polarisation in relativistic heavy-ion collisions has become a new area of research in the soft sector. In this presentation the most interesting results on the observation of global and local polarisation for hyperons and spin alignment for vector mesons in relativistic heavy-ion collisions in a wide range of energies are presented and discussed.