Preface

Bernabei, R.

doi:10.1142/s0217751x14020035

Cited by 7 publications

(21 citation statements)

References 11 publications

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“…The total exposure of DAMA/LIBRA-phase1 is 1.04 ton × yr in seven annual cycles; when including also that of the first generation DAMA/NaI experiment it is 1.33 ton × yr, corresponding to 14 annual cycles [2][3][4]8]. Figure 1 shows the time behaviour of the experimental residual rates of the single-hit scintillation events in the (2-6) keV energy interval for the complete DAMA/LIBRA-phase1.…”

Section: Dm Annual Modulation Resultsmentioning

confidence: 99%

“…Refs. [8,16,17]), has the main aim to investigate the presence of DM particles in the galactic halo by exploiting the modelindependent DM annual modulation signature (originally suggested in Refs. [18,19]).…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8] and references therein. Here we just point out that the sensitive part of this set-up is made of 25 highly radio-pure NaI(Tl) crystal scintillators (5-rows by 5-columns matrix) having 9.70 kg mass each one.…”

Section: Introductionmentioning

confidence: 99%

“…The radio-purity, the protocols, the procedures and the details are discussed in Refs. [1][2][3][4][5][6][7][8] and references therein.…”

Section: Introductionmentioning

confidence: 99%

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Highlights of DAMA/LIBRA

Bernabei

Belli²,

d’Angelo

et al. 2016

EPJ Web Conf.

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Abstract. The DAMA project develops and uses new/improved low background scintillation detectors to investigate the Dark Matter (DM) particle component(s) in the galactic halo and rare processes deep underground at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N.. Here some highlights of DAMA/LIBRA (Large sodium Iodide Bulk for Rare processes) as a unique apparatus in direct DM investigation for its full sensitive mass, target material, intrinsic radio-purity, methodological approach and all the controls performed on the experimental parameters are outlined. The DAMA/LIBRA-phase1 and the former DAMA/NaI data (cumulative exposure 1.33 ton × yr, corresponding to 14 annual cycles) have reached a model-independent evidence at 9.3 σ C.L. for the presence of DM particles in the galactic halo exploiting the DM annual modulation signature with highly radio-pure NaI(Tl) target. Some of the perspectives of the presently running DAMA/LIBRA-phase2 are summarised and the powerful tools offered by a model independent strategy of DM investigation are pointed out.

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Section: Dm Annual Modulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The radio-purity, the protocols, the procedures and the details are discussed in Refs. [1][2][3][4][5][6][7][8] and references therein.…”

Section: Introductionmentioning

confidence: 99%

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Highlights of DAMA/LIBRA

Bernabei

Belli²,

d’Angelo

et al. 2016

EPJ Web Conf.

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“…due to scattering on Na or I, respectively [16,23] . The CoGeNT experiment reported a 2.8σ evidence for an annual modulation [17].…”

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confidence: 99%

New class of biological detectors for WIMPs

Drukier

Cantor

Chonofsky

et al. 2014

Int. J. Mod. Phys. A

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Abstract:Weakly Interacting Massive Particles (WIMPs) may constitute a large fraction of the matter in the Universe. There are excess events in the data of DAMA/LIBRA, CoGeNT, CRESST-II, and recently CDMS-Si, which could be consistent with WIMP masses of approximately 10 GeV/c 2 . However, for M DM > 10 GeV/c 2 null results of the CDMS-Ge, XENON, and LUX detectors may be in tension with the potential detections for certain dark matter scenarios and assuming a certain light response.We propose the use of a new class of biological dark matter (DM) detectors to further examine this light dark matter hypothesis, taking advantage of new signatures with low atomic number targets, Two types of biological DM detectors are discussed here: DNA-based detectors and enzymatic reactions (ER) based detectors. In the case of DNA-based detectors, we discuss a new implementation. In the case of ER detectors, there are four crucial phases of the detection process: a) change of state due to energy deposited by a particle; b) amplification due to the release of energy derived from the action of an enzyme on its substrate; c) sustainable but non-explosive enzymatic reaction; d) self-termination due to the denaturation of the enzyme, when the temperature is raised. This paper provides information of how to design as well as optimize these four processes. 1) INTRODUCTION In the mid 20th century, new classes of particle/radiation detectors were introduced about every 5 years. The last new classes of detectors were introduced about 30 and 25 years ago, namely cryogenic particle detectors and liquid noble gas detectors, respectively. Yet there are needs of physics and biology which require new classes of detectors with nano-metric spatial resolution e.g. detection of Dark Matter (DM) candidates and detectors for massspectroscopy.The first generation of particle/radiation detectors consisted of photographic emulsions and gas detectors. The majority of modern particle detectors are liquids and solid-state detectors. All of these detectors have, as output, either photons or electrons, which are easy to count with modern photonics and/or electronics.We propose a new class of detectors, which use thermal processes or molecular transformations to detect particle interaction effect(s). One of the byproducts of the development of molecular biology and nanotechnology is that we now understand and can engineer material properties at a scale of a few nanometers. This includes better understanding of heat propagation processes at the nanoscale. We can produce a wide variety of nano-size objects and order them spatially. It becomes possible to manipulate the flow of heat just as we manipulate the flow of 1 electrons in solid-state devices. In a sense, the development of Superheated Superconducting Colloid [26] and other cryogenic bolometers [18,19,24] were a first step in this direction. However, they operate at cryogenic temperatures, which facilitate thermal engineering but make their implementation and operation more difficult. In this paper, we pr...

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Annual modulations from secular variations: not relaxing DAMA?

Messina

Nardecchia

Piacentini

2020

J. Cosmol. Astropart. Phys.

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In a recent paper [arXiv:2002.00459], Buttazzo et al. show how the annually modulated rate of the DAMA experiments can be possibly interpreted as an artefact due to the interplay between a time-dependent background and the method to account for it. In this work, we compare this hypothesis against the sinusoidal dark matter signal as proposed by the DAMA collaboration. We produce in a Bayesian approach a quantitative comparison of how much the experimental observations are in support of each hypothesis. Our conclusions are that the odds against the hypothesis of a time varying background being responsible for the annual modulation are decreased by a Bayes factor larger than 10 8 after considering the public available data of the DAMA/NaI and DAMA/LIBRA experiments. In this work we also elaborate on general aspects of the analysis procedure. Indeed, in order to optimise the background subtraction procedure, the DAMA collaboration only considers data-taking cycles with a duration of roughly one year. We argue that any data-taking cycle is informative, and we propose a procedure to include this effect, as well as the possibility to include a slowly varying component for the background.

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Preface

Abstract: preface to the issue of International Journal of Modern Physics A 29 (2014) \ud dedicated to Dark Matter by R. Bernabei invited guest Edito

Cited by 7 publications

References 11 publications

Highlights of DAMA/LIBRA

Highlights of DAMA/LIBRA

New class of biological detectors for WIMPs

Annual modulations from secular variations: not relaxing DAMA?

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