Scalar field damping at high temperatures

Bödeker D, Nienaber J (2022)
arXiv:2205.14166.

Preprint | Englisch
 
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Autor*in
Bödeker, DietrichUniBi; Nienaber, Jan
Abstract / Bemerkung
The motion of a scalar field that interacts with a hot plasma, like the inflaton during reheating, is damped, which is a dissipative process. At high temperatures the damping can be described by a local term in the effective equation of motion. The damping coefficient is sensitive to multiple scattering. In the loop expansion its computation would require an all-order resummation. Instead we solve an effective Boltzmann equation, similarly to the computation of transport coefficients. For an interaction with another scalar field we obtain a simple relation between the damping coefficient and the bulk viscosity, so that one can make use of known results for the latter. The numerical prefactor of the damping coefficient turns out to be rather large, of order $ 10 ^ 4 $.
Erscheinungsjahr
2022
Zeitschriftentitel
arXiv:2205.14166
Page URI
https://pub.uni-bielefeld.de/record/2963751

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Bödeker D, Nienaber J. Scalar field damping at high temperatures. arXiv:2205.14166. 2022.
Bödeker, D., & Nienaber, J. (2022). Scalar field damping at high temperatures. arXiv:2205.14166
Bödeker, D., and Nienaber, J. (2022). Scalar field damping at high temperatures. arXiv:2205.14166.
Bödeker, D., & Nienaber, J., 2022. Scalar field damping at high temperatures. arXiv:2205.14166.
D. Bödeker and J. Nienaber, “Scalar field damping at high temperatures”, arXiv:2205.14166, 2022.
Bödeker, D., Nienaber, J.: Scalar field damping at high temperatures. arXiv:2205.14166. (2022).
Bödeker, Dietrich, and Nienaber, Jan. “Scalar field damping at high temperatures”. arXiv:2205.14166 (2022).

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arXiv: 2205.14166

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