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DAMA/LIBRA-phase1 results and perspectives of the phase2

Authors :
V. Caracciolo
F. Montecchia
A. Incicchitti
H. H. Kuang
Z. P. Ye
F. Cappella
R. Cerulli
C. J. Dai
H. L. He
S. d'Angelo
P. Belli
R. Bernabei
Rong Wang
A. Di Marco
Sheng Xiuli
A. d’Angelo
Xiuhua Ma
Source :
EPJ Web of Conferences, Vol 121, p 06005 (2016), Scopus-Elsevier, EPJ Web of Conferences, Vol 95, p 03001 (2015)
Publication Year :
2016
Publisher :
EDP Sciences, 2016.

Abstract

The results obtained with the total exposure of 1.04 ton × yr collected by DAMA/LIBRA–phase1 deep underground at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. during 7 annual cycles are summarized. The DAMA/LIBRA–phase1 and the former DAMA/NaI data (cumulative exposure 1.33 ton × yr, corresponding to 14 annual cycles) give evidence at 9.3 σ C.L. for the presence of Dark Matter (DM) particles in the galactic halo, on the basis of the exploited model independent DM annual modulation signature by using highly radio-pure NaI(Tl) target. No systematic or side reaction able to mimic the exploited DM signature has been found or suggested by anyone over more than a decade. The same data of DAMA/LIBRA–phase1 have also been analyzed searching for possible DM second-order diurnal effect; at present, the DM diurnal modulation amplitude – expected because of the Earth diurnal motion – evaluated on the basis of the DAMA Dark Matter annual modulation results is below the reached experimental sensitivity. Some of the perspectives of the presently running DAMA/LIBRA–phase2 are outlined.

Details

Language :
English
Volume :
121
Database :
OpenAIRE
Journal :
EPJ Web of Conferences
Accession number :
edsair.doi.dedup.....5a46931eee36219d6efbe0f968948546