Experimental observations and theoretical arguments at galactic and larger scales pointed out that a large fraction of the Universe is composed of Dark Matter (DM) particles. This has motivated the pioneer DAMA experimental efforts to investigate the presence of such particles in the galactic halo, by exploiting a model independent signature and very highly radio–pure apparata in deep underground. In this paper, after a short introductory part, the long–standing model–independent annual modulation effect measured by DAMA Collaboration, with various experimental configurations, is examined. In the energy region between 2 and 6 keV, the data from DAMA/NaI, DAMA/LIBRA–phase1 and DAMA/LIBRA–phase2 (full exposure: 2.46 ton × yr) confirm the evidence of a signal that meets all the several specific requirements of the exploited model independent DM annual modulation signature, at 12.9 σ C.L.. The DAMA/LIBRA–phase2 configuration, profiting from new high quantum efficiency photomultipliers, new electronics and other improvements with respect to DAMA/LIBRA–phase1, has also allowed the confirmation of such an evidence down to a software energy threshold of 1 keV. The complexity and the uncertainties of corollary model dependent quests for the DM candidate particle(s) and related scenarios are also addressed at some extent and several of the many possibilities are examined. The efforts towards the new phase3 of the experiment are summarized, showing the strategies and the results obtained with the present developments.

Bernabei, R., Belli, P., Bussolotti, A., Cappella, F., Caracciolo, V., Cerulli, R., et al. (2020). The DAMA project: achievements, implications and perspectives. PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, 114, 103810-1-103810-72 [10.1016/j.ppnp.2020.103810].

The DAMA project: achievements, implications and perspectives

Bernabei, R;Caracciolo, V;Di Marco, A;Merlo, V;Montecchia, F;
2020-01-01

Abstract

Experimental observations and theoretical arguments at galactic and larger scales pointed out that a large fraction of the Universe is composed of Dark Matter (DM) particles. This has motivated the pioneer DAMA experimental efforts to investigate the presence of such particles in the galactic halo, by exploiting a model independent signature and very highly radio–pure apparata in deep underground. In this paper, after a short introductory part, the long–standing model–independent annual modulation effect measured by DAMA Collaboration, with various experimental configurations, is examined. In the energy region between 2 and 6 keV, the data from DAMA/NaI, DAMA/LIBRA–phase1 and DAMA/LIBRA–phase2 (full exposure: 2.46 ton × yr) confirm the evidence of a signal that meets all the several specific requirements of the exploited model independent DM annual modulation signature, at 12.9 σ C.L.. The DAMA/LIBRA–phase2 configuration, profiting from new high quantum efficiency photomultipliers, new electronics and other improvements with respect to DAMA/LIBRA–phase1, has also allowed the confirmation of such an evidence down to a software energy threshold of 1 keV. The complexity and the uncertainties of corollary model dependent quests for the DM candidate particle(s) and related scenarios are also addressed at some extent and several of the many possibilities are examined. The efforts towards the new phase3 of the experiment are summarized, showing the strategies and the results obtained with the present developments.
2020
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
DAMA experiments; Dark Matter; ULB NaI(Tl);
https://www.sciencedirect.com/science/article/abs/pii/S0146641020300570
Bernabei, R., Belli, P., Bussolotti, A., Cappella, F., Caracciolo, V., Cerulli, R., et al. (2020). The DAMA project: achievements, implications and perspectives. PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, 114, 103810-1-103810-72 [10.1016/j.ppnp.2020.103810].
Bernabei, R; Belli, P; Bussolotti, A; Cappella, F; Caracciolo, V; Cerulli, R; Dai, Cj; D’Angelo, A; Di Marco, A; Ferrari, N; 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/2108/253367
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