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Heavy quark diffusion in an overoccupied gluon plasma

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arxiv 2005.02418 v2 pith:T4VB6EKR submitted 2020-05-05 hep-ph hep-latnucl-th

classification hep-phhep-latnucl-th
keywords growthbroadeningdiffusionenhancementmomentumoscillationsplasmatime
verification ladder T0 review T1 audit T2 compute T3 formal
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We extract the heavy-quark diffusion coefficient \kappa and the resulting momentum broadening <p^2> in a far-from-equilibrium non-Abelian plasma. We find several features in the time dependence of the momentum broadening: a short initial rapid growth of <p^2>, followed by linear growth with time due to Langevin-type dynamics and damped oscillations around this growth at the plasmon frequency. We show that these novel oscillations are not easily explained using perturbative techniques but result from an excess of gluons at low momenta. These oscillation are therefore a gauge invariant confirmation of the infrared enhancement we had previously observed in gauge-fixed correlation functions. We argue that the kinetic theory description of such systems becomes less reliable in the presence of this IR enhancement.

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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. Melting of $c \bar c$ and $b \bar b$ pairs in the pre-equilibrium stage of proton-nucleus collisions at the Large Hadron Collider

    hep-ph 2024-12 conditional novelty 6.0 of 10

    Color decorrelation in the evolving glasma melts roughly half of initially singlet charm and bottom quark pairs within about 0.4 to 0.5 fm/c after their formation in proton-nucleus collisions at the LHC.

  2. Effect of Coriolis Force on Diffusion of D Meson

    hep-ph 2024-11 conditional novelty 5.0 of 10

    D meson spatial diffusion in a rotating hadron gas becomes anisotropic, with perpendicular and Hall components controlled by the Coriolis force and the ratio of relaxation time to rotation time.

  3. Non-Markovian heavy-quark equilibration and equilibrium correlation function in a thermal medium

    hep-ph 2026-07 conditional novelty 4.0 of 10

    Memory (colored noise) changes the transient equilibration of heavy quarks but leaves their asymptotic spatial diffusion coefficient unchanged in this Langevin model.

  4. Entropy from decoherence: a case study using glasma-based occupation numbers

    hep-ph 2025-07 reject novelty 4.0 of 10

    Decoherence of a glasma-like coherent state yields an entropy per particle below the thermal gluon gas value, except in proton-nucleus collisions at small g mu.

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