A Monte Carlo Study of Lambda Hyperon Polarization at BM@N

Relaxation time for quark spin and thermal vorticity alignment in heavy-ion collisions

“…The possibility to develop a local alignment of particle spin along the thermal vorticity, has prompted the search for consequences, among them, the chiral vortical effect [3] and the global polarization of hadrons, most notably of hyperons [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Moreover, recent measurements of different global polarization of Λ and Λ, as the collision energy decreases [22], motivate the need for a deeper understanding of the conditions for relaxation between angular momentum and spin degrees of freedom and of its dependence on the collision parameters such as energy, impact parameter, temperature and quark chemical potential.…”

Fermion propagator in a rotating environment

“…The problem has attracted a great deal of attention over the last years [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In a recent work [24], we have explored the Λ and Λ polarization within a model where the overlap region in a peripheral heavy-ion collision consists of a dense core and a less dense corona, from where different Λ and Λ production mechanisms are at play [25].…”

Rise and fall of $Λ$ and $\barΛ$ global polarization in semi-central heavy-ion collisions at HADES, NICA and RHIC energies from the core-corona model

“…The polarization properties of Λ and Λ have received increasing attention over the last years due to the possibility to link this observable to the properties of the medium produced in relativistic heavy-ion collisions [1][2][3][4][5][6][7][8][9][10][11][12][13]. For semi-central collisions, the matter density profile in the transverse plane develops an angular momentum [14] which can be quantified in terms of the thermal vorticity [15].…”