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Axion searches with the EDELWEISS-II experiment

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arxiv 1307.1488 v1 pith:KPJGBWK2 submitted 2013-07-04 astro-ph.CO hep-ph

Axion searches with the EDELWEISS-II experiment

E. Armengaud , Q. Arnaud , C. Augier , A. Benoit , L. Berg\'e , T. Bergmann , J. Bl\"umer , A. Broniatowski
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V. Brudanin P. Camus A. Cazes B. Censier M. Chapellier F. Charlieux F. Cou\"edo P. Coulter G.A. Cox T. de Boissi\`ere M. De Jesus Y. Dolgorouky A.A. Drillien L. Dumoulin K. Eitel D. Filosofov N. Fourches J. Gascon G. Gerbier M. Gros L. Hehn S. Henry S. Herv\'e G. Heuermann N. Holtzer V. Humbert A. Juillard C. K\'ef\'elian M. Kleifges H. Kluck V. Kozlov H. Kraus V.A. Kudryavtsev H. le Sueur M. Mancuso C. Marrache-Kikuchi S. Marnieros A. Menshikov X-F. Navick C. Nones E. Olivieri P. Pari B. Paul M.C. Piro O. Rigaut M. Robinson S. Rozov V. Sanglard B. Schmidt B. Siebenborn D. Tcherniakhovski M. Tenconi L. Vagneron R.J. Walker M. Weber E. Yakushev X. Zhang
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classification astro-ph.CO hep-ph
keywords axionstimescouplingexperimentaxioncouplingsedelweiss-iielectron
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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 $g_{A\gamma}<2.13\times 10^{-9}$ GeV$^{-1}$ in a mass range not fully covered by axion helioscopes. We also constrain the coupling to electrons, $g_{Ae} < 2.56\times 10^{-11}$, similar to the more indirect solar neutrino bound. Finally we place a limit on $g_{Ae}\times g_{AN}^{\rm eff}<4.70 \times 10^{-17}$, where $g_{AN}^{\rm eff}$ is the effective axion-nucleon coupling for $^{57}$Fe. Combining these results we fully exclude the mass range $0.91\,{\rm eV}<m_A<80$ keV for DFSZ axions and $5.73\,{\rm eV}<m_A<40$ keV for KSVZ axions.

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