Tachyonic production of dark relics : classical lattice vs. quantum 2PI in Hartree truncation
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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Journal of High Energy PhysicsDate
2024Copyright
© The Authors.
Article funded by SCOAP3
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).
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Springer NatureISSN Search the Publication Forum
1126-6708Keywords
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https://converis.jyu.fi/converis/portal/detail/Publication/243304551
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The work of OV was supported by a grant from the Magnus Ehrnrooth foundation.License
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