Direct search for Dark Matter particles deep underground

The application of very low background techniques is fundamental in deep underground experiments dedicated to the investigation of rare processes. In this paper, the case of NaI(Tl) detectors is discussed mainly considering their crucial role for direct Dark Matter (DM) investigation. In particular, the DAMA/LIBRA apparatus, as a result of a long-standing activity focused on the optimization of NaI(Tl) detectors, is underlined.

Download Full-text

The first results of PandaX-4T

International Journal of Modern Physics D ◽

10.1142/s0218271822300075 ◽

2022 ◽

Author(s):

Jianglai Liu

Keyword(s):

Dark Matter ◽

Data Analysis ◽

Liquid Xenon ◽

Observable Universe ◽

Fundamental Particle ◽

Search Results ◽

Visible Matter ◽

First Results ◽

New Type ◽

Deep Underground

Dark matter, an invisible substance which constitutes 85% of the matter in the observable universe, is one of the greatest puzzles in physics and astronomy today. Dark matter can be made of a new type of fundamental particle, not yet observed due to its feeble interactions with visible matter. In this talk, we present the first results of PandaX-4T, a 4-ton-scale liquid xenon dark matter observatory, searching for these dark matter particles from deep underground. We will briefly summarize the performance of PandaX-4T, introduces details in the data analysis, and present the latest search results on dark matter-nucleon interactions.

Download Full-text

DARK MATTER PARTICLES IN THE GALACTIC HALO: RESULTS AND IMPLICATIONS FROM DAMA/NaI

International Journal of Modern Physics D ◽

10.1142/s0218271804006619 ◽

2004 ◽

Vol 13 (10) ◽

pp. 2127-2159 ◽

Cited By ~ 178

Author(s):

R. BERNABEI ◽

P. BELLI ◽

F. CAPPELLA ◽

R. CERULLI ◽

F. MONTECCHIA ◽

...

Keyword(s):

Dark Matter ◽

Galactic Halo ◽

National Laboratory ◽

Dark Matter Particle ◽

Side Reactions ◽

Annual Modulation ◽

Annual Cycles ◽

Systematic Effects ◽

Deep Underground ◽

Model Independent

The DAMA/NaI experiment (≃100 kg highly radiopure NaI(Tl)) was proposed, designed and realized to effectively investigate in a model-independent way the presence of a Dark Matter particle component in the galactic halo by exploiting the annual modulation signature. With a total exposure of 107731 kg · day, collected over seven annual cycles deep underground at the Gran Sasso National Laboratory of the I.N.F.N., it has pointed out — at 6.3σC.L. — an effect which satisfies all the peculiarities of the signature and neither systematic effects nor side reactions able to mimic the signature were found. Moreover, several (but still few with respect to the possibilities) corollary model dependent quests for the candidate particle have been carried out. In this paper the obtained results are summarized and some perspectives are discussed at some extent.

Download Full-text