Cosmic axion background
| Autor: | Jeff A. Dror, Nicholas L. Rodd, Hitoshi Murayama |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Quantum Physics Particle physics COSMIC cancer database Axion Dark Matter Experiment hep-ex media_common.quotation_subject Dark matter Molecular hep-ph Atomic Nuclear & Particles Physics Frequency spectrum Universe Topological defect Coupling (physics) Particle and Plasma Physics astro-ph.CO Nuclear Axion Astronomical and Space Sciences media_common |
| Zdroj: | Physical Review D, vol 103, iss 11 Physical Review |
| Popis: | Existing searches for cosmic axions relics have relied heavily on the axion being nonrelativistic and making up dark matter. However, light axions can be copiously produced in the early Universe and remain relativistic today, thereby constituting a Cosmic axion Background (CaB). As prototypical examples of axion sources, we consider thermal production, dark-matter decay, parametric resonance, and topological defect decay. Each of these has a characteristic frequency spectrum that can be searched for in axion direct detection experiments. We focus on the axion-photon coupling and study the sensitivity of current and future versions of ADMX, HAYSTAC, DMRadio, and ABRACADABRA to a CaB, finding that the data collected in search of dark matter can be repurposed to detect axion energy densities well below limits set by measurements of the energy budget of the Universe. In this way, direct detection of relativistic relics offers a powerful new opportunity to learn about the early Universe and, potentially, discover the axion. |
| Databáze: | OpenAIRE |
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