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Equilibrium and Non-Equilibrium Hard Thermal Loop Resummation in the Real Time Formalism

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arxiv hep-ph/9708363 v2 pith:IRR42RDL submitted 1997-08-15 hep-ph hep-thnucl-th

Magaret E. Carrington , Hou Defu , Markus H. Thoma This is my paper
classification hep-phhep-thnucl-th
keywords hardnon-equilibriumresummationdiscussformalismloopphotonpropagator
verification ladder T0 review T1 audit T2 compute T3 formal
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We investigate the use of the hard thermal loop (HTL) resummation technique in non-equilibrium field theory. We use the Keldysh representation of the real time formalism (RTF). We derive the HTL photon self energy and the resummed photon propagator. We show that no pinch singularities appear in the non-equilibrium HTL effective propagator. We discuss a possible regularization mechanism for these singularities at higher orders. As an example of the application of the HTL resummation method within the RTF we discuss the damping rate of a hard electron.

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Cited by 3 Pith papers

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

  1. Schwinger-Keldysh Path Integral for Gauge theories

    hep-th 2026-04 unverdicted novelty 7.0 of 10

    Constructs a manifestly diagonal-BRST-invariant Schwinger-Keldysh path integral for open non-Abelian gauge theories with arbitrary physical initial states, yielding Ward-Takahashi-Slavnov-Taylor identities and a Keldy...

  2. Beyond thermal approximations: Precise cosmological bounds on Axion-Like Particles

    astro-ph.CO 2026-02 conditional novelty 6.0 of 10

    Solving the momentum-dependent Boltzmann equation and propagating the exact non-thermal ALP spectrum into CMB analyses yields 95% limits f_a>1.63e6 GeV (e), 9.41e6 GeV (mu), 8.06e4 GeV (tau), and g_a_gamma<1.98e-8 GeV^-1.

  3. Coherent State Path Integral Reveals Unexpected Vacuum Structure in Thermal Field Theory

    hep-th 2025-07 reject novelty 3.0 of 10

    A coherent-state derivation of the thermal partition function yields extra vacuum and mass-coupling terms that the authors claim are novel, though these terms reflect the chosen operator ordering.

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