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Linear response theory for spin alignment of vector mesons in thermal media

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arxiv 2311.18400 v2 pith:6V2DS665 submitted 2023-11-30 hep-ph hep-thnucl-th

classification hep-phhep-thnucl-th
keywords alignmentspinthermalvectorconstantcouplingfunctionsinteraction
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We present a calculation of the spin alignment for unflavored vector mesons in thermalized quark-gluon plasma based on the Kubo formula in linear response theory. This is achieved by expanding the system to the first order of the coupling constant and the spatial gradient. The effect strongly relies on the vector meson's spectral functions which are determined by the interaction and medium properties. The spectral functions are calculated for the one-quark-loop self-energy with meson-quark interaction. The numerical results show that the correction to the spin alignment from the thermal shear tensor is of the order $10^{-4}\sim10^{-5}$ for the chosen values of quark-meson coupling constant, if the magnitude of thermal shear tensor is $10^{-2}$.

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Forward citations

Cited by 5 Pith papers

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

  1. Vector-Meson Spin Alignment from Anisotropic Quark or Hadron Coalescence

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Anisotropic quark or hadron coalescence in heavy-ion collisions generates vector-meson spin alignment whose sign distinguishes bare-vector from spin-orbit-coupled production vertices.

  2. 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.

  3. Vector and Tensor Spin Polarization for Vector Bosons at Local Equilibrium

    hep-ph 2024-12 conditional novelty 6.0 of 10

    Vector meson spin alignment at local equilibrium is shown to arise only at second order in thermodynamic gradients, with explicit analytic formulas for the contributing terms.

  4. Spin alignment of vector mesons in local equilibrium by Zubarev's approach

    hep-ph 2024-12 conditional novelty 6.0 of 10

    The spin alignment rho00-1/3 vanishes at first order in gradients in local equilibrium, with nonzero contributions first appearing at second order, in a pseudo-gauge dependent way.

  5. 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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