Scalar field damping at high temperatures

Bödeker D, Nienaber J (2022)
Physical Review D 106(5): 056016.

Zeitschriftenaufsatz | Veröffentlicht | 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 104.
Erscheinungsjahr
2022
Zeitschriftentitel
Physical Review D
Band
106
Ausgabe
5
Art.-Nr.
056016
ISSN
2470-0010
eISSN
2470-0029
Page URI
https://pub.uni-bielefeld.de/record/2963751

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Bödeker D, Nienaber J. Scalar field damping at high temperatures. Physical Review D. 2022;106(5): 056016.
Bödeker, D., & Nienaber, J. (2022). Scalar field damping at high temperatures. Physical Review D, 106(5), 056016. https://doi.org/10.1103/PhysRevD.106.056016
Bödeker, Dietrich, and Nienaber, Jan. 2022. “Scalar field damping at high temperatures”. Physical Review D 106 (5): 056016.
Bödeker, D., and Nienaber, J. (2022). Scalar field damping at high temperatures. Physical Review D 106:056016.
Bödeker, D., & Nienaber, J., 2022. Scalar field damping at high temperatures. Physical Review D, 106(5): 056016.
D. Bödeker and J. Nienaber, “Scalar field damping at high temperatures”, Physical Review D, vol. 106, 2022, : 056016.
Bödeker, D., Nienaber, J.: Scalar field damping at high temperatures. Physical Review D. 106, : 056016 (2022).
Bödeker, Dietrich, and Nienaber, Jan. “Scalar field damping at high temperatures”. Physical Review D 106.5 (2022): 056016.
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arXiv: 2205.14166

Inspire: 2089066

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