4.7 Review

Spin and polarization: a new direction in relativistic heavy ion physics

Journal

REPORTS ON PROGRESS IN PHYSICS
Volume 85, Issue 12, Pages -

Publisher

IOP Publishing Ltd
DOI: 10.1088/1361-6633/ac97a9

Keywords

spin; heavy ion physics; quark gluon plasma; relativistic hydrodynamics

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This article reviews the recent progress in the field of global polarization of Λ hyperons in relativistic nuclear collisions since its first discovery in 2017, highlighting the importance and potential of spin in both experimental and theoretical aspects. The article also discusses the intriguing connections of spin physics in relativistic matter with fundamental questions in quantum field theory and applications in the non-relativistic domain.
Since the first evidence of a global polarization of ? hyperons in relativistic nuclear collisions in 2017, spin has opened a new window in the field, both at experimental and theoretical level, and an exciting perspective. The current state of the field is reviewed with regard to the theoretical understanding of the data, reporting on the most recent achievements and envisioning possible developments. The intriguing connections of spin physics in relativistic matter with fundamental questions in quantum field theory and applications in the non-relativistic domain are discussed.

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