In recent years, machine learning has emerged as a powerful computational tool and novel
problem-solving perspective for physics, offering new avenues for studying strongly …

The quark–gluon plasma (QGP) produced by collisions between ultrarelativistic heavy
nuclei is well described in the language of hydrodynamics. Noncentral collisions are …

We study the spin polarization generated by the hydrodynamic gradients. In addition to the
widely studied thermal vorticity effects, we identify an undiscovered contribution from the …

We show that the inclusion of a recently found additional term of the spin polarization vector
at local equilibrium which is linear in the symmetrized gradients of the velocity field, and the …

The Λ (Λ¯) hyperon polarization along the beam direction has been measured in Au+ Au
collisions at s NN= 200 GeV, for the first time in heavy-ion collisions. The polarization …

The strong force which binds hadrons is described by the theory of quantum
chromodynamics (QCD). Determining the character and manifestations of QCD is one of the …

Global hyperon polarization, P¯ H, in Au+ Au collisions over a large range of collision
energy, s NN, was recently measured and successfully reproduced by hydrodynamic and …

A bstract We systematically analyze the effects of the derivatives of the hydrodynamic fields
on axial Wigner function that describes the spin polarization vector in phase space. We have …

The first evidence of spin alignment of vector mesons (K* 0 and ϕ) in heavy-ion collisions at
the Large Hadron Collider (LHC) is reported. The spin density matrix element ρ 00 is …

Abstract This White Paper presents an overview of the current status and future perspective
of QCD research, based on the community inputs and scientific conclusions from the 2022 …