Results and strategies in dark matter detection

2016 ◽  
Vol 25 (05) ◽  
pp. 1630013
Author(s):  
Pierluigi Belli
Keyword(s):  
Dark Matter ◽  
Galactic Halo ◽  
The Other ◽  
Annual Modulation ◽  
Parallel Session ◽  
Model Independent ◽  
Dark Matter Detection ◽  
Matter Detection

The dark matter (DM) parallel session DM2 of the 14th Marcel Grossmann Meeting was enriched by several contributions about the results and the strategies in the study and in the detection of DM particles in the Galactic halo. In the following, an overview of the latest results in this field will be summarized. A particular care will be given to the results obtained by exploiting the model independent DM annual modulation signature for the presence of DM particles in the galactic halo. Results from the other experiments using different procedures, different techniques and different target materials will be shortly addressed as well as implications and experimental perspectives.

scholarly journals Galactic halo models and particle dark-matter detection

1998 ◽  
Vol 57 (6) ◽  
pp. 3256-3263 ◽  
Author(s):  
Marc Kamionkowski ◽  
Ali Kinkhabwala
Keyword(s):  
Dark Matter ◽  
Galactic Halo ◽  
Particle Dark Matter ◽  
Dark Matter Detection ◽  
Matter Detection

scholarly journals PARTICLE DARK MATTER IN THE GALACTIC HALO: RESULTS FROM DAMA/LIBRA

2012 ◽  
Vol 12 ◽  
pp. 37-47
Author(s):  
R. BERNABEI ◽  
P. BELLI ◽  
F. MONTECCHIA ◽  
F. NOZZOLI ◽  
F. CAPPELLA ◽  
...  
Keyword(s):  
Dark Matter ◽  
First Generation ◽  
Galactic Halo ◽  
National Laboratory ◽  
Annual Modulation ◽  
Independent Evidence ◽  
Total Exposure ◽  
Annual Cycles ◽  
Model Independent ◽  
Particle Dark Matter

The DAMA/LIBRA experiment, running at the Gran Sasso National Laboratory of the I.N.F.N. in Italy, has a sensitive mass of about 250 kg highly radiopure NaI(Tl). It is mainly devoted to the investigation of Dark Matter (DM) particles in the Galactic halo by exploiting the model independent DM annual modulation signature. The present DAMA/LIBRA experiment and the former DAMA/NaI one (the first generation experiment having an exposed mass of about 100 kg) have cumulatively released so far the results obtained with the data collected over 13 annual cycles; the total exposure is 1.17 ton × yr. They give a model independent evidence of the presence of DM particles in the galactic halo at 8.9 σ C.L. on the basis of the investigated DM signature. Few aspects of the obtained results are summarized and some comments addressed.

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

2004 ◽  
Vol 13 (10) ◽  
pp. 2127-2159 ◽  
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.

scholarly journals Model-independent identification of inelastic WIMPs from direct Dark Matter detection experiments

2014 ◽  
Vol 29 (05) ◽  
pp. 1450014 ◽  
Author(s):  
Sen Miao ◽  
Chung-Lin Shan ◽  
Yu-Feng Zhou
Keyword(s):  
Dark Matter ◽  
Data Analysis ◽  
Mass Splitting ◽  
Data Sets ◽  
Independent Data ◽  
Nucleus Scattering ◽  
Model Independent ◽  
Dark Matter Detection ◽  
Matter Detection ◽  
Direct Dark Matter

In this paper, we introduce model-independent data analysis procedures for identifying inelastic WIMP-nucleus scattering as well as for reconstructing the mass and the mass splitting of inelastic WIMPs simultaneously and separately. Our simulations show that, with 𝒪(50) observed WIMP signals from one experiment, one could already distinguish the inelastic WIMP scattering scenarios from the elastic one. By combining two or more data sets with positive signals, the WIMP mass and the mass splitting could even be reconstructed with statistical uncertainties of less than a factor of two.

scholarly journals The Annual Modulation Signature for Dark Matter: DAMA/LIBRA-Phase1 Results and Perspectives

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Rita Bernabei ◽  
Pierluigi Belli ◽  
Fabio Cappella ◽  
Vincenzo Caracciolo ◽  
Simone Castellano ◽  
...  
Keyword(s):  
Dark Matter ◽  
Galactic Halo ◽  
National Laboratory ◽  
Cumulative Exposure ◽  
Side Reactions ◽  
Modulation Amplitude ◽  
Annual Modulation ◽  
Annual Cycles ◽  
Deep Underground ◽  
Model Independent

The results obtained with the total exposure of 1.04 ton × yr collected by DAMA/LIBRA-phase1 deep underground at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. during 7 annual cycles are summarized. The DAMA/LIBRA-phase1 and the former DAMA/NaI data (cumulative exposure 1.33 ton × yr, corresponding to 14 annual cycles) give evidence at 9.3 σ C.L. for the presence of Dark Matter (DM) particles in the galactic halo, on the basis of the exploited model independent DM annual modulation signature by using highly radiopure NaI(Tl) target. The modulation amplitude of thesingle-hitevents in the (2–6) keV energy interval is0.0112±0.0012 cpd/kg/keV; the measured phase is144±7days and the measured period is0.998±0.002 yr; values are in a good well in agreement with those expected for DM particles. No systematic or side reactions able to mimic the exploited DM signature have been found or suggested by anyone over more than a decade. Some of the perspectives of the presently running DAMA/LIBRA-phase2 are outlined.

PARTICLE DARK MATTER IN THE GALACTIC HALO: RESULTS AND PERSPECTIVES

2013 ◽  
Vol 22 (11) ◽  
pp. 1360001 ◽  
Author(s):  
R. BERNABEI ◽  
P. BELLI ◽  
A. DI MARCO ◽  
F. MONTECCHIA ◽  
F. CAPPELLA ◽  
...  
Keyword(s):  
Dark Matter ◽  
Galactic Halo ◽  
National Laboratory ◽  
Future Perspectives ◽  
Annual Modulation ◽  
Total Exposure ◽  
Annual Cycles ◽  
Deep Underground ◽  
Model Independent ◽  
Particle Dark Matter

The DAMA project is an observatory for rare processes operating deep underground at the Gran Sasso National Laboratory of the I.N.F.N. In particular, the main apparatus DAMA/LIBRA is mainly dedicated to the investigation of the presence of Dark Matter (DM) particles in the galactic halo by exploiting the model independent DM annual modulation signature. The present DAMA/LIBRA and the former DAMA/ NaI (exposed masses: ≃ 250 kg and ≃ 100 kg of highly radiopure NaI ( Tl ), respectively) experiments have released so far a total exposure of 1.17 ton × yr, collected over 13 annual cycles. They have obtained a positive model independent result for the presence of DM particles in the galactic halo at 8.9σ C.L. Some of the obtained results are shortly summarized and future perspectives mentioned.

scholarly journals DAMA/LIBRA Results and Perspectives

2018 ◽  
Vol 182 ◽  
pp. 02027 ◽  
Author(s):  
R. Bernabei ◽  
P. Belli ◽  
F. Cappella ◽  
V. Caracciolo ◽  
R. Cerulli ◽  
...  
Keyword(s):  
Dark Matter ◽  
Galactic Halo ◽  
Side Reaction ◽  
Modulation Effect ◽  
Annual Modulation ◽  
Annual Cycles ◽  
The Earth ◽  
Shadowing Effect ◽  
Increased Sensitivity ◽  
Model Independent

The DAMA/LIBRA experiment (~ 250 kg sensitive mass composed by highly radio-pure NaI(Tl)) is in data taking in the underground Laboratory of Gran Sasso (LNGS). In its first phase (DAMA/LIBRA-phase1) this experiment and the former DAMA/NaI experiment (~ 100 kg of highly radio-pure NaI(Tl)) collected data for 14 independent annual cycles, exploiting the model-independent Dark Matter (DM) annual modulation signature (total exposure 1.33 ton x yr). A DM annual modulation effect has been observed at 9.3 σ C.L., supporting the presence of DM particles in the galactic halo. No systematic or side reaction able to mimic the observed DM annual modulation has been found or suggested by anyone. Recent analyses on possible diurnal effects, on the Earth shadowing effect and on possible interpretation in terms of Mirror DM will be mentioned. At present DAMA/LIBRA is running in its phase2 with increased sensitivity.

scholarly journals Effects of threshold energy on reconstructions of properties of low-mass WIMPs in direct dark matter detection experiments

2018 ◽  
Vol 33 (20) ◽  
pp. 1850120
Author(s):  
Yu Bai ◽  
Weichao Sun ◽  
Chung-Lin Shan
Keyword(s):  
Monte Carlo ◽  
Dark Matter ◽  
Mass Formula ◽  
Threshold Energy ◽  
Weakly Interacting Massive Particles ◽  
Low Mass ◽  
Model Independent ◽  
Dark Matter Detection ◽  
Matter Detection ◽  
Direct Dark Matter

In this paper, we revisit our model-independent methods developed for reconstructing properties of Weakly Interacting Massive Particles (WIMPs) by using measured recoil energies from direct Dark Matter detection experiments directly and take into account more realistically non-negligible threshold energy. All expressions for reconstructing the mass and the (ratios between the) spin-independent and the spin-dependent WIMP–nucleon couplings have been modified. We focus on low-mass ([Formula: see text] GeV) WIMPs and present the numerical results obtained by Monte Carlo simulations. Constraints caused by non-negligible threshold energy and technical treatments for improving reconstruction results will also be discussed.

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