Spin polarization and correlation of quarks from glasma

Abstract

We investigate the interaction of strong color fields in the glasma stage of high-energy nuclear collisions with the spins of quarks and antiquarks. We employ the perturbative solution of the quantum kinetic theory for the spin transport of (massive) quarks in a background color field governed by the linearized Yang-Mills equation and derive expressions for the quark-spin polarization and quark-antiquark spin correlation at small momentum in terms of field correlators. For the Golec-Biernat Wüsthoff dipole distribution the quark-spin polarization vanishes, but the out-of-plane spin correlation of quarks and antiquarks is nonzero. Our order-of-magnitude estimate of the correlation far exceeds that caused by vorticity effects, but does not fully explain the data for vector meson alignment. We identify possible mechanisms that could further increase the predicted spin correlation.

36 pages, 5 figures, some errors corrected, conclusions unchanged, matched journal version

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Cited by in corpus (8)

• Spin alignment of vector mesons by glasma fields
• Spin alignment of vector mesons by second-order hydrodynamic gradients
• Transverse and longitudinal spin alignment from color fields in heavy ion collisions
• Vector and Tensor Spin Polarization for Vector Bosons at Local Equilibrium
• Quarkonium Polarization in Medium from Open Quantum Systems and Chromomagnetic Correlators
• Spin alignment of $K^{\ast }$ induced by strange-baryon density inhomogeneity
• Anisotropic linear waves and breakdown of the momentum expansion in spin magnetohydrodynamics
• Production of $K^{+}{K}^{-}$ Pairs Through Decay of $\varphi$ Meson