scholarly journals INVESTIGATING PSEUDOSCALAR AND SCALAR DARK MATTER

2006 ◽  
Vol 21 (07) ◽  
pp. 1445-1469 ◽  
Author(s):  
R. BERNABEI ◽  
P. BELLI ◽  
F. MONTECCHIA ◽  
F. NOZZOLI ◽  
F. CAPPELLA ◽  
...  
Keyword(s):  
Dark Matter ◽  
Galactic Halo ◽  
Dark Matter Candidate ◽  
Experimental Setup ◽  
X Rays ◽  
Independent Evidence ◽  
Model Independent

In this paper another class of Dark Matter candidate particles — the pseudoscalar and scalar light bosonic candidates — is discussed. Particular care is devoted to the study of the processes for their detection (which only involves electrons and photons/X-rays) in a suitable underground experimental setup. For this purpose the needed calculations are developed and various related aspects and phenomenologies are discussed. In particular, it is shown that — in addition to the WIMP cases already discussed elsewhere — there is also possibility for a bosonic candidate to account for the 6.3σ C.L. model independent evidence for the presence of a particle DM component in the galactic halo observed by DAMA/ NaI . Allowed regions in these scenarios are presented also paying particular care on the cosmological interest of the bosonic candidate.

Particle dark matter in the galactic halo: recent results from DAMA/LIBRAThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at École de Physique, les Houches, France, 30 May – 4 June, 2010.

2011 ◽  
Vol 89 (1) ◽  
pp. 141-152 ◽  
Author(s):  
R. Bernabei ◽  
P. Belli ◽  
F. Montecchia ◽  
F. Nozzoli ◽  
F. Cappella ◽  
...  
Keyword(s):  
Dark Matter ◽  
First Generation ◽  
Galactic Halo ◽  
National Laboratory ◽  
Cumulative Exposure ◽  
Independent Evidence ◽  
Annual Cycles ◽  
Atomic Systems ◽  
Model Independent ◽  
Particle Dark Matter

The DAMA/LIBRA experiment has a sensitive mass of about 250 kg highly radiopure NaI(Tl). It is running at the Gran Sasso National Laboratory of the INFN in Italy and 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 and the former DAMA/NaI experiments (the first generation experiment having an exposed mass of about 100 kg) have thus far cumulatively released the results of data collected over 13 annual cycles (total exposure: 1.17 t year). They give model-independent evidence of the presence of DM particles in the galactic halo on the basis of the investigated DM signature at 8.9 σ C.L. for the cumulative exposure. The main aspects of the obtained results are summarized and some comments are addressed.

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 DAMA RESULTS: DARK MATTER IN THE GALACTIC HALO

2013 ◽  
Vol 53 (A) ◽  
pp. 589-594
Author(s):  
R. Bernabei ◽  
P. Belli ◽  
F. Cappella ◽  
V. Caracciolo ◽  
R. Cerulli ◽  
...  
Keyword(s):  
Dark Matter ◽  
Confidence Level ◽  
First Generation ◽  
Galactic Halo ◽  
Large Fraction ◽  
Future Perspectives ◽  
Independent Evidence ◽  
Annual Cycles ◽  
Model Independent ◽  
The Universe

Experimental efforts and theoretical developmens support that most of the Universe is Dark and a large fraction of it should be made of relic particles; many possibilities are open on their nature and interaction types. In particular, the DAMA/LIBRA experiment at Gran Sasso Laboratory (sensitive mass: ~250 kg) is mainly devoted to the investigation of Dark Matter (DM) particles in the Galactic halo by exploiting the model independent DM annual modulation signature with higly radiopure Na I(Tl) targets. DAMA/LIBRA is the succesor of the first generation DAMA/NaI (sensitive mass: ~100 kg); cumulatively the two experiments have released so far the results obtained by analyzing an exposure of 1.17 t yr, collected over 13 annual cycles. The data show a model independent evidence of the presence of DM particles in the galactic halo at 8.9σ confidence level (C.L.). Some of the already achieved results are shortly reminded, the last upgrade occurred at fall 2010 is mentioned and future perspectives are sumarized.

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 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 Signatures of ultralight dark matter in neutrino oscillation experiments

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Abhish Dev ◽  
Pedro A. N. Machado ◽  
Pablo Martínez-Miravé
Keyword(s):  
Dark Matter ◽  
Neutrino Oscillation ◽  
Experimental Analysis ◽  
Neutrino Oscillations ◽  
Experimental Setup ◽  
Oscillation Probability ◽  
Time Modulation ◽  
Matter Effects ◽  
Model Independent ◽  
Oscillation Experiment

Abstract We study how neutrino oscillations could probe the existence of ultralight bosonic dark matter. Three distinct signatures on neutrino oscillations are identified, depending on the mass of the dark matter and the specific experimental setup. These are time modulation signals, oscillation probability distortions due to fast modulations, and fast varying matter effects. We provide all the necessary information to perform a bottom-up, model-independent experimental analysis to probe such scenarios. Using the future DUNE experiment as an example, we estimate its sensitivity to ultralight scalar dark matter. Our results could be easily used by any other oscillation experiment.

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 DARK MATTER INVESTIGATION BY DAMA AT GRAN SASSO

2013 ◽  
Vol 28 (16) ◽  
pp. 1330022 ◽  
Author(s):  
R. BERNABEI ◽  
P. BELLI ◽  
S. d'ANGELO ◽  
A. DI MARCO ◽  
F. MONTECCHIA ◽  
...  
Keyword(s):  
Dark Matter ◽  
Present Model ◽  
Galactic Halo ◽  
Large Fraction ◽  
National Laboratory ◽  
Deep Underground ◽  
Model Independent ◽  
The Universe ◽  
Positive Results

Experimental observations and theoretical arguments at Galaxy and larger scales have suggested that a large fraction of the Universe is composed by Dark Matter particles. This has motivated the DAMA experimental efforts to investigate the presence of such particles in the galactic halo by exploiting a model independent signature and very highly radiopure setup in deep underground. Few introductory arguments are summarized before presenting a review of the present model independent positive results obtained by the DAMA/NaI and DAMA/LIBRA setups at the Gran Sasso National Laboratory of the INFN. Implications and model dependent comparisons with other different kinds of results will be shortly addressed. Some arguments put forward in literature will be confuted.

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