The first results obtained by the DAMA/LIBRA-phase2 experiment with the data collected deep underground at the Gran Sasso National Laboratory over 6 independent annual cycles (corresponding to a total exposure of 1.13 ton x yr) are presented. The DAMA/LIBRA-phase2 apparatus, about 250 kg highly radio-pure NaI(Tl), profits of a second generation high quantum efficiency photomultipliers and of new electronics; in the new configuration the software energy threshold is at 1 keV. The DAMA/LIBRA-phase2 data confirm the evidence of a signal that meets all the requirements of the model independent Dark Matter annual modulation signature, at 9.5 sigma C.L. in the energy region (1-6) keV. In the energy region between 2 and 6 keV, where data are also available from DAMA/NaI and DAMA/LIBRA-phase1 the achieved C.L. for the full exposure (2.46 ton x yr) is 12.9 sigma.
Bernabei, R., Belli, P., Bussolotti, A., Cappella, F., Caracciolo, V., Cerulli, R., et al. (2018). First results from DAMA/LIBRA–phase2. NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS, 303-305, 74-79 [10.1016/j.nuclphysbps.2019.03.015].
First results from DAMA/LIBRA–phase2
Bernabei R.;Caracciolo V.;Di Marco A.;Merlo V.;Montecchia F.;
2018-01-01
Abstract
The first results obtained by the DAMA/LIBRA-phase2 experiment with the data collected deep underground at the Gran Sasso National Laboratory over 6 independent annual cycles (corresponding to a total exposure of 1.13 ton x yr) are presented. The DAMA/LIBRA-phase2 apparatus, about 250 kg highly radio-pure NaI(Tl), profits of a second generation high quantum efficiency photomultipliers and of new electronics; in the new configuration the software energy threshold is at 1 keV. The DAMA/LIBRA-phase2 data confirm the evidence of a signal that meets all the requirements of the model independent Dark Matter annual modulation signature, at 9.5 sigma C.L. in the energy region (1-6) keV. In the energy region between 2 and 6 keV, where data are also available from DAMA/NaI and DAMA/LIBRA-phase1 the achieved C.L. for the full exposure (2.46 ton x yr) is 12.9 sigma.| File | Dimensione | Formato | |
|---|---|---|---|
|
1-s2.0-S2405601419300598-main.pdf
solo utenti autorizzati
Tipologia:
Versione Editoriale (PDF)
Licenza:
Copyright dell'editore
Dimensione
673.3 kB
Formato
Adobe PDF
|
673.3 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
