Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 34: Axionen I

T 34.6: Vortrag

Dienstag, 26. März 2019, 17:15–17:30, S09

Search for hidden-photon dark matter with FUNK — •Arnaud Andrianavalomahefa¹, Kai Daumiller¹, Ralph Engel¹, Hermann-Josef Mathes¹, Markus Roth¹, Christoph M. Schäfer¹, Thomas Schwetz-Mangold¹, Ralf Ulrich¹, Darko Veberic¹, Babette Döbrich², Joerg Jaeckel³, Axel Lindner⁴, Marek Kowalski^4,5, and Javier Redondo⁶ — ¹Institute for Nuclear Physics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany — ²Physics Department, CERN, Geneva, Switzerland — ³Institute for Theoretical Physics, Heidelberg University, Germany — ⁴Deutsches Elektronen Synchrotron (DESY), Zeuthen, Germany — ⁵Department of Physics, Humboldt University, Berlin, Germany — ⁶Department of Theoretical Physics, University of Zaragoza, Spain

The FUNK experiment was built to search for hidden and light U(1) gauge force carriers, named hidden photons, which are suitable candidates for cold dark matter. At low energies, these photons with small mass couple dominantly with regular photons via a weak kinetic mixing. As an immediate consequence, when propagating across two different dielectric media a certain probability exists that the dark-matter field emits a faint but measurable ordinary electric field. The FUNK experiment uses a large spherical mirror to capture this conversion. A photomultiplier tube is installed at the radius point where the signal is expected. We scanned the whole optical range of frequencies extended to far-UV and looked for hidden photons with masses from 2 to 8 eV. In this region we found no significant evidence of hidden-photon dark-matter but set an upper bound on the mixing parameter to 10⁻¹².