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 appro...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-10-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP10(2024)009 |
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| _version_ | 1850169332713127936 |
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| author | Kimmo Kainulainen Sami Nurmi Olli Väisänen |
| author_facet | Kimmo Kainulainen Sami Nurmi Olli Väisänen |
| author_sort | Kimmo Kainulainen |
| collection | DOAJ |
| description | 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 $$ \mathcal{O} $$ (1). |
| format | Article |
| id | doaj-art-bea8c077686e4b0e8a064bfaa33198dc |
| institution | OA Journals |
| issn | 1029-8479 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-bea8c077686e4b0e8a064bfaa33198dc2025-08-20T02:20:45ZengSpringerOpenJournal of High Energy Physics1029-84792024-10-0120241011710.1007/JHEP10(2024)009Tachyonic production of dark relics: classical lattice vs. quantum 2PI in Hartree truncationKimmo Kainulainen0Sami Nurmi1Olli Väisänen2Department of Physics, University of JyväskyläDepartment of Physics, University of JyväskyläDepartment of Physics, University of JyväskyläAbstract 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 $$ \mathcal{O} $$ (1).https://doi.org/10.1007/JHEP10(2024)009Early Universe Particle PhysicsModels for Dark MatterNon-Equilibrium Field TheoryNonperturbative Effects |
| spellingShingle | Kimmo Kainulainen Sami Nurmi Olli Väisänen Tachyonic production of dark relics: classical lattice vs. quantum 2PI in Hartree truncation Journal of High Energy Physics Early Universe Particle Physics Models for Dark Matter Non-Equilibrium Field Theory Nonperturbative Effects |
| title | Tachyonic production of dark relics: classical lattice vs. quantum 2PI in Hartree truncation |
| title_full | Tachyonic production of dark relics: classical lattice vs. quantum 2PI in Hartree truncation |
| title_fullStr | Tachyonic production of dark relics: classical lattice vs. quantum 2PI in Hartree truncation |
| title_full_unstemmed | Tachyonic production of dark relics: classical lattice vs. quantum 2PI in Hartree truncation |
| title_short | Tachyonic production of dark relics: classical lattice vs. quantum 2PI in Hartree truncation |
| title_sort | tachyonic production of dark relics classical lattice vs quantum 2pi in hartree truncation |
| topic | Early Universe Particle Physics Models for Dark Matter Non-Equilibrium Field Theory Nonperturbative Effects |
| url | https://doi.org/10.1007/JHEP10(2024)009 |
| work_keys_str_mv | AT kimmokainulainen tachyonicproductionofdarkrelicsclassicallatticevsquantum2piinhartreetruncation AT saminurmi tachyonicproductionofdarkrelicsclassicallatticevsquantum2piinhartreetruncation AT ollivaisanen tachyonicproductionofdarkrelicsclassicallatticevsquantum2piinhartreetruncation |