Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search

Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search. Armengaud, E., Arnaud, Q., Augier, C., Benoît, A., Benoît, A., Bergé, L., Bergmann, T., Billard, J., Blümer, J., De Boissière, T., Bres, G., Broniatowski, A., Brudanin, V., Camus, P., Cazes, A., Chapellier, M., Charlieux, F., Dumoulin, L., Eitel, K., Filosofov, D., Foerster, N., Fourches, N., Garde, G., Gascon, J., Gerbier, G., Giuliani, A., Grollier, M., Gros, M., Hehn, L., Hervé, S., Heuermann, G., Humbert, V., De Jésus, M., Jin, Y., Jokisch, S., Juillard, A., Kéfélian, C., Kleifges, M., Kozlov, V., Kraus, H., Kudryavtsev, V. A., Le-Sueur, H., Lin, J., Mancuso, M., Marnieros, S., Menshikov, A., Navick, X. F., Nones, C., Olivieri, E., Pari, P., Paul, B., Piro, M. C., Poda, D. V., Queguiner, E., Robinson, M., Rodenas, H., Rozov, S., Sanglard, V., Schmidt, B., Scorza, S., Siebenborn, B., Tcherniakhovski, D., Vagneron, L., Weber, M., Yakushev, E., & Zhang, X. Journal of Cosmology and Astroparticle Physics, 2016(5):019–019, May, 2016.

Paper doi abstract bibtex

We present the results of a search for elastic scattering from galactic dark matter in the form of Weakly Interacting Massive Particles (WIMPs) in the 4-30 GeV/$c{\textasciicircum}2$ mass range. We make use of a 582 kg-day fiducial exposure from an array of 800 g Germanium bolometers equipped with a set of interleaved electrodes with full surface coverage. We searched specifically for ${\}sim 2.5-20$ keV nuclear recoils inside the detector fiducial volume. As an illustration the number of observed events in the search for 5 (resp. 20) GeV/$c{\textasciicircum}2$ WIMPs are 9 (resp. 4), compared to an expected background of 6.1 (resp. 1.4). A 90% CL limit of $4.3{\}times 10{\textasciicircum}\{-40\}$ cm${\textasciicircum}2$ (resp. $9.4{\}times 10{\textasciicircum}\{-44\}$ cm${\textasciicircum}2$) is set on the spin-independent WIMP-nucleon scattering cross-section for 5 (resp. 20) GeV/$c{\textasciicircum}2$ WIMPs. This result represents a 41-fold improvement with respect to the previous EDELWEISS-II low-mass WIMP search for 7 GeV/$c{\textasciicircum}2$ WIMPs. The derived constraint is in tension with hints of WIMP signals from some recent experiments, thus confirming results obtained with different detection techniques.

@article{armengaud_constraints_2016,
	title = {Constraints on low-mass {WIMPs} from the {EDELWEISS}-{III} dark matter search},
	volume = {2016},
	url = {http://dx.doi.org/10.1088/1475-7516/2016/05/019%5Cnhttp://stacks.iop.org/1475-7516/2016/i=05/a=019?key=crossref.a0423f8f84ce35c669686c3641e60502},
	doi = {10.1088/1475-7516/2016/05/019},
	abstract = {We present the results of a search for elastic scattering from galactic dark matter in the form of Weakly Interacting Massive Particles (WIMPs) in the 4-30 GeV/\$c{\textasciicircum}2\$ mass range. We make use of a 582 kg-day fiducial exposure from an array of 800 g Germanium bolometers equipped with a set of interleaved electrodes with full surface coverage. We searched specifically for \${\textbackslash}sim 2.5-20\$ keV nuclear recoils inside the detector fiducial volume. As an illustration the number of observed events in the search for 5 (resp. 20) GeV/\$c{\textasciicircum}2\$ WIMPs are 9 (resp. 4), compared to an expected background of 6.1 (resp. 1.4). A 90\% CL limit of \$4.3{\textbackslash}times 10{\textasciicircum}\{-40\}\$ cm\${\textasciicircum}2\$ (resp. \$9.4{\textbackslash}times 10{\textasciicircum}\{-44\}\$ cm\${\textasciicircum}2\$) is set on the spin-independent WIMP-nucleon scattering cross-section for 5 (resp. 20) GeV/\$c{\textasciicircum}2\$ WIMPs. This result represents a 41-fold improvement with respect to the previous EDELWEISS-II low-mass WIMP search for 7 GeV/\$c{\textasciicircum}2\$ WIMPs. The derived constraint is in tension with hints of WIMP signals from some recent experiments, thus confirming results obtained with different detection techniques.},
	number = {5},
	journal = {Journal of Cosmology and Astroparticle Physics},
	author = {Armengaud, E. and Arnaud, Q. and Augier, C. and Benoît, A. and Benoît, A. and Bergé, L. and Bergmann, T. and Billard, J. and Blümer, J. and De Boissière, T. and Bres, G. and Broniatowski, A. and Brudanin, V. and Camus, P. and Cazes, A. and Chapellier, M. and Charlieux, F. and Dumoulin, L. and Eitel, K. and Filosofov, D. and Foerster, N. and Fourches, N. and Garde, G. and Gascon, J. and Gerbier, G. and Giuliani, A. and Grollier, M. and Gros, M. and Hehn, L. and Hervé, S. and Heuermann, G. and Humbert, V. and De Jésus, M. and Jin, Y. and Jokisch, S. and Juillard, A. and Kéfélian, C. and Kleifges, M. and Kozlov, V. and Kraus, H. and Kudryavtsev, V. A. and Le-Sueur, H. and Lin, J. and Mancuso, M. and Marnieros, S. and Menshikov, A. and Navick, X. F. and Nones, C. and Olivieri, E. and Pari, P. and Paul, B. and Piro, M. C. and Poda, D. V. and Queguiner, E. and Robinson, M. and Rodenas, H. and Rozov, S. and Sanglard, V. and Schmidt, B. and Scorza, S. and Siebenborn, B. and Tcherniakhovski, D. and Vagneron, L. and Weber, M. and Yakushev, E. and Zhang, X.},
	month = may,
	year = {2016},
	keywords = {dark matter detectors, dark matter experiments},
	pages = {019--019},
}

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