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Momentum dependence of $\phi$ meson's spin alignment

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arxiv 2308.14038 v1 pith:LAX5EKLL submitted 2023-08-27 nucl-th hep-ph

classification nucl-thhep-ph
keywords rapidityspinalignmentdependenceangleazimuthalglobalmeson
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We study the rapidity and azimuthal angle dependences of the global spin alignment $\rho_{00}$ for $\phi$ mesons with respect to the reaction plane in Au+Au collisions at RHIC by the relativistic coalescence model in the spin transport theory. The global spin alignment of $\phi$ mesons arises from local fluctuations of strong force fields whose values are extracted from the STAR's data. The calculated results show that $\rho_{00}<1/3$ at the rapidity $Y=0$, and then it increases with rapidity and becomes $\rho_{00}>1/3$ at $Y=1$. Such a rapidity dependence is dominated by the relative motion of the $\phi$ meson in the bulk matter. We also give prediction for the azimuthal angle dependence of $\rho_{00}$ at different rapidities.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Spectral Functions of $J/\psi$ Meson in Rotating Thermal Background from Holography

    hep-th 2026-08 conditional novelty 6.0 of 10

    In a rotating thermal medium modeled by soft-wall holography, J/ψ spectral peaks split by −ΩJ_z along the rotation axis and acquire projection-dependent distortions for transverse momentum.

  2. Tensor spin polarization induced by curved freeze-out hypersurface

    hep-ph 2025-09 conditional novelty 6.0 of 10

    The curvature of the freeze-out hypersurface induces a tensor spin polarization of vector mesons at leading gradient order, with predicted phi-meson spin alignment around -10^-4 to -10^-3.

  3. Is the shear induced spin polarization non-dissipative?

    hep-ph 2025-07 conditional novelty 6.0 of 10

    Shear-induced spin polarization leaves the momentum-integrated entropy production rate unchanged in chiral kinetic theory, but Zubarev's linear response suggests a dissipative origin.

  4. Spin alignment of vector mesons in heavy-ion collision

    hep-ph 2025-07 conditional novelty 1.0 of 10

    A proceedings review in which the authors argue that strong-field fluctuations, not shear stress, explain the measured phi meson spin alignment in heavy-ion collisions.

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