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.
2018
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Dark Matter; annual modulation; highly radiopure NaI(Tl) detectors; low background
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].
Bernabei, R; Belli, P; Bussolotti, A; Cappella, F; Caracciolo, V; Cerulli, R; Dai, Cj; D'Angelo, A; Di Marco, A; He, Hl; Incicchitti, A; Ma, Xh; Mattei, A; Merlo, V; Montecchia, F; Sheng, Xd; Ye, Zp
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/267745
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