The results obtained with the total exposure of 1.04 ton × yr collected by DAMA/LIBRA–phase1 deep un- derground at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. during 7 annual cycles (i.e. adding a further 0.17 ton × yr exposure) are presented. The DAMA/LIBRA– phase1 data give evidence for the presence of Dark Mat- ter (DM) particles in the galactic halo, on the basis of the exploited model independent DM annual modulation sig- nature by using highly radio-pure NaI(Tl) target, at 7.5σ C.L. Including also the first generation DAMA/NaI exper- iment (cumulative exposure 1.33 ton × yr, corresponding to 14 annual cycles), the C.L. is 9.3σ and the modula- tion amplitude of the single-hit events in the (2–6) keV en- ergy interval is: (0.0112 ± 0.0012) cpd/kg/keV; the mea- sured phase is (144 ± 7) days and the measured period is (0.998 ± 0.002) yr, values well in agreement with those ex- pected for DM particles. No systematic or side reaction able to mimic the exploited DM signature has been found or suggested by anyone over more than a decade.

Bernabei, R., Belli, P., Cappella, F., Caracciolo, V., Castellano, S., Cerulli, R., et al. (2013). Final model independent result of DAMA/LIBRA-phase1. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 73, 2648-1-2648-11 [10.1140/epjc/s10052-013-2648-7].

Final model independent result of DAMA/LIBRA-phase1

BERNABEI, RITA;Caracciolo, V;D'ANGELO, SILIO;MONTECCHIA, FRANCESCO;
2013-01-01

Abstract

The results obtained with the total exposure of 1.04 ton × yr collected by DAMA/LIBRA–phase1 deep un- derground at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. during 7 annual cycles (i.e. adding a further 0.17 ton × yr exposure) are presented. The DAMA/LIBRA– phase1 data give evidence for the presence of Dark Mat- ter (DM) particles in the galactic halo, on the basis of the exploited model independent DM annual modulation sig- nature by using highly radio-pure NaI(Tl) target, at 7.5σ C.L. Including also the first generation DAMA/NaI exper- iment (cumulative exposure 1.33 ton × yr, corresponding to 14 annual cycles), the C.L. is 9.3σ and the modula- tion amplitude of the single-hit events in the (2–6) keV en- ergy interval is: (0.0112 ± 0.0012) cpd/kg/keV; the mea- sured phase is (144 ± 7) days and the measured period is (0.998 ± 0.002) yr, values well in agreement with those ex- pected for DM particles. No systematic or side reaction able to mimic the exploited DM signature has been found or suggested by anyone over more than a decade.
2013
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
Dark Matter; low background; scintillators
http://link.springer.com/article/10.1140%2Fepjc%2Fs10052-013-2648-7#page-1
Bernabei, R., Belli, P., Cappella, F., Caracciolo, V., Castellano, S., Cerulli, R., et al. (2013). Final model independent result of DAMA/LIBRA-phase1. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 73, 2648-1-2648-11 [10.1140/epjc/s10052-013-2648-7].
Bernabei, R; Belli, P; Cappella, F; Caracciolo, V; Castellano, S; Cerulli, R; Dai, Cj; D'Angelo, A; D'Angelo, S; Di Marco, A; He, Hl; Incicchitti, A; Kuang, Hh; Ma, Xh; Montecchia, F; Prosperi, D; Sheng, Xd; Wang, Rg; Ye, Zp
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/87869
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