Periodic Reporting for period 3 - AXION (Axions: From Heaven to Earth)
Periodo di rendicontazione: 2020-09-01 al 2022-02-28
Remarkably, axions have just the right properties to provide the dark matter. Specifically, they are produced in the right amount during the big bang, they are almost at rest when produced, and they interact very feebly with conventional matter. This makes a surprising and beautiful connection between fundamental physics and cosmology.
If dark matter is made of axions, the theory of axions predicts that it will be difficult, but perhaps not impossible, to detect. We are developing technologies that might make detection possible.
The theoretical ideas which give us axions also suggest new phenomena – ”axion electrodynamics” and ”emergent axions” – that can be and have been, observed in laboratory experiments in special materials. This may lead to useful developments in advanced electronics.
Working groups in the ALPHA collaboration are presently addressing the issues that arise in bringing the above-mentioned technologies to bear in detail. Those groups have been meeting regularly and presently are finalizing white papers.
This document will also provide the blueprint for second-generation prototypes that we estimate will be capable of setting new and cosmologically significant limits (or making discoveries) in a narrow range of parameters and demonstrate the possibility to scale up to mature instruments that will fulfill the promise mentioned above.
Remarkably, careful study has revealed that our early estimates of what our plasma haloscopes can achieve were almost certainly too conservative.