Tachyonic production of dark relics : classical lattice vs. quantum 2PI in Hartree truncation
Abstract
We study the out-of-equilibrium production of non-minimally coupled self-interacting scalar dark matter during reheating using classical lattice simulations. The outcomes of the classical simulations are in qualitative agreement with the previous results obtained using the quantum 2PI approach in the Hartree truncation. In particular, the novel non-linear resonance found in the 2PI Hartee study is present also in the classical lattice simulations and can dominate the final dark matter yield. For the parameters considered, the difference in final value of the scalar two-point function between the two approaches is a factor of O(1).
Main Authors
Format
Articles
Research article
Published
2024
Series
Subjects
Publication in research information system
Publisher
Springer Nature
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202410216423Käytä tätä linkitykseen.
Review status
Peer reviewed
ISSN
1126-6708
DOI
https://doi.org/10.1007/jhep10(2024)009
Language
English
Published in
Journal of High Energy Physics
Citation
- Kainulainen, K., Nurmi, S., & Väisänen, O. (2024). Tachyonic production of dark relics : classical lattice vs. quantum 2PI in Hartree truncation. Journal of High Energy Physics, 2024, Article 9. https://doi.org/10.1007/jhep10(2024)009
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Additional information about funding
The work of OV was supported by a grant from the Magnus Ehrnrooth foundation.
Copyright© The Authors.
Article funded by SCOAP3