Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search
E. Armengaud
(1)
,
Q. Arnaud
(2)
,
C. Augier
(2, 3)
,
A. Benoît
(4)
,
L. Bergé
(5)
,
T. Bergmann
,
J. Billard
(2)
,
J. Blümer
,
T. de Boissière
(1)
,
G. Bres
(6)
,
A. Broniatowski
(5)
,
V. Brudanin
,
P. Camus
(7)
,
A. Cazes
(2)
,
M. Chapellier
(5)
,
F. Charlieux
(2)
,
L. Dumoulin
(5)
,
K. Eitel
,
D. Filosofov
,
N. Foerster
,
N. Fourches
(1)
,
G. Garde
(7)
,
J. Gascon
(2)
,
G. Gerbier
,
A. Giuliani
(5)
,
M. Grollier
,
M. Gros
(1)
,
L. Hehn
,
S. Hervé
(1)
,
G. Heuermann
,
V. Humbert
(5)
,
M. de Jésus
(2)
,
Y. Jin
(8)
,
S. Jokisch
,
A. Juillard
(2)
,
C. Kéfélian
(2)
,
M. Kleifges
,
V. Kozlov
,
H. Kraus
,
V. A. Kudryavtsev
,
H. Le-Sueur
(5)
,
J. Lin
,
M. Mancuso
(5)
,
S. Marnieros
(5)
,
A. Menshikov
,
X. -F. Navick
(1)
,
C. Nones
(1)
,
E. Olivieri
(5)
,
P. Pari
(9)
,
B. Paul
(1)
,
M. -C. Piro
(5)
,
D. V. Poda
(5)
,
E. Queguiner
(2)
,
M. Robinson
,
H. Rodenas
(7)
,
S. Rozov
,
V. Sanglard
(2)
,
B. Schmidt
,
S. Scorza
,
B. Siebenborn
,
D. Tcherniakhovski
,
L. Vagneron
(2)
,
M. Weber
,
E. Yakushev
,
X. Zhang
1
IRFU -
Institut de Recherches sur les lois Fondamentales de l'Univers
2 IPNL - Institut de Physique Nucléaire de Lyon
3 MANOIR - Matière noire
4 NEEL - HELFA - Hélium : du fondamental aux applications
5 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
6 NEEL - ElecLab - Electronique
7 NEEL - Cryo - Cryogénie
8 LPN - Laboratoire de photonique et de nanostructures
9 IRAMIS - Institut Rayonnement Matière de Saclay
2 IPNL - Institut de Physique Nucléaire de Lyon
3 MANOIR - Matière noire
4 NEEL - HELFA - Hélium : du fondamental aux applications
5 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
6 NEEL - ElecLab - Electronique
7 NEEL - Cryo - Cryogénie
8 LPN - Laboratoire de photonique et de nanostructures
9 IRAMIS - Institut Rayonnement Matière de Saclay
T. Bergmann
- Function : Author
J. Blümer
- Function : Author
V. Brudanin
- Function : Author
K. Eitel
- Function : Author
D. Filosofov
- Function : Author
N. Foerster
- Function : Author
G. Gerbier
- Function : Author
M. Grollier
- Function : Author
L. Hehn
- Function : Author
G. Heuermann
- Function : Author
S. Jokisch
- Function : Author
M. Kleifges
- Function : Author
V. Kozlov
- Function : Author
H. Kraus
- Function : Author
V. A. Kudryavtsev
- Function : Author
H. Le-Sueur
- Function : Author
- PersonId : 180518
- IdHAL : helene-le-sueur
J. Lin
- Function : Author
A. Menshikov
- Function : Author
M. Robinson
- Function : Author
S. Rozov
- Function : Author
B. Schmidt
- Function : Author
S. Scorza
- Function : Author
B. Siebenborn
- Function : Author
D. Tcherniakhovski
- Function : Author
M. Weber
- Function : Author
E. Yakushev
- Function : Author
X. Zhang
- Function : Author
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/$c^2$ 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/$c^2$ WIMPs are 9 (resp. 4), compared to an expected background of 6.1 (resp. 1.4). A 90% CL limit of $4.3\times 10^{-40}$ cm$^2$ (resp. $9.4\times 10^{-44}$ cm$^2$) is set on the spin-independent WIMP-nucleon scattering cross-section for 5 (resp. 20) GeV/$c^2$ WIMPs. This result represents a 41-fold improvement with respect to the previous EDELWEISS-II low-mass WIMP search for 7 GeV/$c^2$ WIMPs. The derived constraint is in tension with hints of WIMP signals from some recent experiments, thus confirming results obtained with different detection techniques.