Search for WISPs gains momentum

CERN; Lindner, Axel

Published 2018 | Version v1

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Search for WISPs gains momentum

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Despite tremendous efforts, the search for the constituents of dark matter has so far been unsuccessful. Interest is therefore growing in new experiments that probe dark-matter candidates such as axions and other very weakly interacting sub-eV particles.

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vol58-issue7-p025-e.pdf

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vol58-issue7-p025-e.pdf md5:35ba266b3b503fdec6df9f04093d00eb	3.0 MB	Preview Download
vol58-issue7-p025fig.png md5:8f4f393ff45b8a04c1ed2f762b136428	596.4 kB	Preview Download
Fig. 2. Left: diagram showing axion–photon coupling via axion–pion oscillation. Right: via the Primakoff effect, a virtual photon can be borrowed from a static magnetic field (denoted by the cross) to induce photons to convert into axions or vice versa, as first suggested by P Sikivie. md5:dff399edae0bb17b6c2eac3b2b68003d	23.0 kB	Preview Download
Fig. 1. The potential of a complex scalar field in primordial plasma in the very early universe (left) takes the form of a Sombrero (right) once the temperature drops below the symmetrybreaking scale. The energy-breaking scale corresponds to the radius of the valley from the centre, while the axion represents oscillations around one of the minima, which arise due to QCD gluon-field fluctuations. md5:08839923bed9a89b07769b0cba9c3eb6	168.3 kB	Preview Download
Fig. 4. Schematic principle of a helioscope (top) and lightshining- rough-walls experiment (bottom). md5:28db80d7d03c7da5cb33e181e493b7bf	78.5 kB	Preview Download
Fig. 3. The principle of a dielectric haloscope (left) and a schematic of the proposed MADMAX setup (right). md5:36224ca1e24b301f892cc374af147ea6	247.9 kB	Preview Download
Fig. 6. Schematic of the ALPS II experiment’s final stage, which will re-use 20 HERA straightened dipoles in a section of the tunnel at DESY. md5:a17d0f5f1abf4087478fc44f6ffcc8f6	442.8 kB	Preview Download
Fig. 7. Axion mass versus axion–photon coupling parameter space showing sensitivities and regions that could explain dark matter, stellar anomalies and TeV-transparency hints. md5:228d05a42e730d8d7707d3b3a17550fc	236.9 kB	Preview Download
Fig. 5. The CAST experiment at CERN, which reuses a prototype dipole magnet from the LHC, photographed in December 2016. md5:f13fae502778380a594f8ede4191e878	399.2 kB	Preview Download
vol58-issue7-p034fig.png md5:755d5b2f2884e1123a198db936a3728a	136.8 kB	Preview Download

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Issued: 2018-09

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Despite tremendous efforts, the search for the constituents of dark matter has so far been unsuccessful. Interest is therefore growing in new experiments that probe dark-matter candidates such as axions and other very weakly interacting sub-eV particles.

vol58-issue7-p025-e.pdf

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Search for WISPs gains momentum

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Despite tremendous efforts, the search for the constituents of dark matter has so far been unsuccessful. Interest is therefore growing in new experiments that probe dark-matter candidates such as axions and other very weakly interacting sub-eV particles.

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vol58-issue7-p025-e.pdf

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