Simulations of axionlike particles in the postinflationary scenario
| العنوان: | Simulations of axionlike particles in the postinflationary scenario |
|---|---|
| المؤلفون: | Ciaran A. J. O’Hare, Giovanni Pierobon, Javier Redondo, Yvonne Y. Y. Wong |
| المصدر: | Zaguán. Repositorio Digital de la Universidad de Zaragoza instname Physical Review |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics::Theory, High Energy Physics - Phenomenology (hep-ph), Cosmology and Nongalactic Astrophysics (astro-ph.CO), High Energy Physics::Phenomenology, FOS: Physical sciences, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | Axions and axion-like particles (ALPs) are some of the most popular candidates for dark matter, with several viable production scenarios that make different predictions. In the scenario in which the axion is born after inflation, its field develops significant inhomogeneity and evolves in a highly nonlinear fashion. Understanding the eventual abundance and distribution of axionic dark matter in this scenario therefore requires dedicated numerical simulations. So far the community has focused its efforts on simulations of the QCD axion, a model that predicts a specific temperature dependence for the axion mass. Here, we go beyond the QCD axion, and perform a suite of simulations over a range of possible temperature dependencies labelled by a power-law index. We study the complex dynamics of the axion field, including the scaling of cosmic strings and domain walls, the spectrum of non-relativistic axions, the lifetime and internal structure of axitons, and the seeds of miniclusters. In particular, we quantify how much the string-wall network contributes to the dark matter abundance as a function of how quickly the axion mass grows. We find that a temperature-independent model produces 25\% more dark matter than the standard misalignment calculation. In contrast to this generic ALP, QCD axion models are almost six times less efficient at producing dark matter. Given the flourishing experimental campaign to search for ALPs, these results have potentially wide implications for direct and indirect searches. Version accepted by PRD, added small paragraph (section IIG) on the comparison with previous simulations. 19 pages, additional visualisations at https://www.youtube.com/channel/UCqosWwoOKrdmNKBbIwVUuGg |
| وصف الملف: | application/pdf |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77986c2e69c7a02994b6f1d80562ae87 http://zaguan.unizar.es/record/117206 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....77986c2e69c7a02994b6f1d80562ae87 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |