A search for low-mass WIMPs with EDELWEISS-II heat-and-ionization detectors
Abstract
We report on a search for low-energy (E < 20 keV) WIMP-induced nuclear recoils using data collected in 2009 - 2010 by EDELWEISS from four germanium detectors equipped with thermal sensors and an electrode design (ID) which allows to efficiently reject several sources of background. The data indicate no evidence for an exponential distribution of low-energy nuclear recoils that could be attributed to WIMP elastic scattering after an exposure of 113 kg.d. For WIMPs of mass 10 GeV, the observation of one event in the WIMP search region results in a 90% CL limit of 1.0x10^-5 pb on the spin-independent WIMP-nucleon scattering cross-section, which constrains the parameter space associated with the findings reported by the CoGeNT, DAMA and CRESST experiments.
Keywords
Cite
@article{arxiv.1207.1815,
title = {A search for low-mass WIMPs with EDELWEISS-II heat-and-ionization detectors},
author = {EDELWEISS Collaboration and E. Armengaud and C. Augier and A. Benoît and L. Bergé and T. Bergmann and J. Blümer and A. Broniatowski and V. Brudanin and B. Censier and M. Chapellier and F. Charlieux and F. Couëdo and P. Coulter and G. A. Cox and J. Domange and A. A. Drillien and L. Dumoulin and K. Eitel and D. Filosofov and N. Fourches and J. Gascon and G. Gerbier and J. Gironnet and M. Gros and G. Heuermann and S. Henry and S. Hervé and A. Juillard and M. Kleifges and H. Kluck and V. Kozlov and H. Kraus and V. A. Kudryavtsev and H. Le Sueur and P. Loaiza and S. Marnieros and A. Menshikov and X. -F. Navick and C. Nones and E. Olivieri and P. Pari and B. Paul and M. Robinson and S. Rozov and V. Sanglard and B. Schmidt and B. Siebenborn and D. Tcherniakhovski and A. S. Torrento-Coello and L. Vagneron and R. J. Walker and M. Weber and E. Yakushev and X. Zhang},
journal= {arXiv preprint arXiv:1207.1815},
year = {2012}
}
Comments
PRD rapid communication accepted