paper

Axion searches with the EDELWEISS-II experiment

arXiv:1307.1488 · doi:10.1088/1475-7516/2013/11/067

Abstract

We present new constraints on the couplings of axions and more generic axion-like particles using data from the EDELWEISS-II experiment. The EDELWEISS experiment, located at the Underground Laboratory of Modane, primarily aims at the direct detection of WIMPs using germanium bolometers. It is also sensitive to the low-energy electron recoils that would be induced by solar or dark matter axions. Using a total exposure of up to 448 kg.d, we searched for axion-induced electron recoils down to 2.5 keV within four scenarios involving different hypotheses on the origin and couplings of axions. We set a 95% CL limit on the coupling to photons GeV in a mass range not fully covered by axion helioscopes. We also constrain the coupling to electrons, , similar to the more indirect solar neutrino bound. Finally we place a limit on , where is the effective axion-nucleon coupling for Fe. Combining these results we fully exclude the mass range keV for DFSZ axions and keV for KSVZ axions.

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