197 research outputs found
A few final comments to arXiv:1210.7548[hep-ph]
A few final comments on arXiv:1210.7548 are given to confute incorrect
arguments claimed there
No role for muons in the DAMA annual modulation results
This paper gathers arguments and reasons why muons surviving the Gran Sasso
mountain cannot mimic the Dark Matter annual modulation signature exploited by
the DAMA/NaI and DAMA/LIBRA experiments. A number of these items have already
been presented in individual papers. Further arguments have been addressed here
in order to present a comprehensive collection and to enable a wider community
to correctly approach this point.Comment: 26 pages, 9 figures. Few arguments added; version accepted for
publication on Eur. Phys. J.
Particle Dark Matter and DAMA/LIBRA
The DAMA/LIBRA set-up (about 250 kg highly radiopure NaI(Tl) sensitive mass)
is running at the Gran Sasso National Laboratory of the I.N.F.N.. The first
DAMA/LIBRA results confirm the evidence for the presence of a Dark Matter
particle component in the galactic halo, as pointed out by the former DAMA/NaI
set-up; cumulatively the data support such evidence at 8.2 sigma C.L. and
satisfy all the many peculiarities of the Dark Matter annual modulation
signature. The main aspects and prospects of this model independent
experimental approach will be outlined.Comment: Contributed paper to the Int. Conf. SciNeGHE 2009, Assisi, Italy,
October 200
Investigating halo substructures with annual modulation signature
Galaxy hierarchical formation theories, numerical simulations, the discovery
of the Sagittarius Dwarf Elliptical Galaxy (SagDEG) in 1994 and more recent
investigations suggest that the dark halo of the Milky Way can have a rich
phenomenology containing non thermalized substructures. In the present
preliminary study, we investigate the case of the SagDEG (the best known
satellite galaxy in the Milky Way crossing the solar neighbourhood) analyzing
the consequences of its dark matter stream contribution to the galactic halo on
the basis of the DAMA/NaI annual modulation data. The present analysis is
restricted to some WIMP candidates and to some of the astrophysical, nuclear
and particle Physics scenarios. Other candidates such as e.g. the light bosonic
ones, we discussed elsewhere, and other non thermalized substructures are not
yet addressed here.Comment: 17 pages, 10 figures, to appear in Eur. Phys. J.
No role for neutrons, muons and solar neutrinos in the DAMA annual modulation results
This paper summarizes in a simple and intuitive way why the neutrons, the
muons and the solar neutrinos cannot give any significant contribution to the
DAMA annual modulation results. A number of these elements have already been
presented in individual papers; they are recalled here. Afterwards, few simple
considerations are summarized which already demonstrate the incorrectness of
the claim reported in PRL 113 (2014) 081302.Comment: 11 pages, 1 tabl
The DAMA/LIBRA apparatus
The 250 kg highly radiopure NaI(Tl) DAMA/LIBRA apparatus, running at
the Gran Sasso National Laboratory (LNGS) of the I.N.F.N., is described.Comment: 37 pages, 27 figure
Dark Matter investigation by DAMA at Gran Sasso
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 set-ups 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 set-ups 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.Comment: review article, 71 pages, 25 figures, 8 tables; v2: minor
modifications. In publication on the International Journal of Modern Physics
Investigating Earth shadowing effect with DAMA/LIBRA-phase1
In the present paper the results obtained in the investigation of possible
diurnal effects for low-energy single-hit scintillation events of
DAMA/LIBRA-phase1 (1.04 ton yr exposure) have been analysed in terms
of an effect expected in case of Dark Matter (DM) candidates inducing nuclear
recoils and having high cross-section with ordinary matter, which implies low
DM local density in order to fulfill the DAMA/LIBRA DM annual modulation
results. This effect is due to the different Earth depths crossed by those DM
candidates during the sidereal day.Comment: 22 pages, 9 figures, 1 table; in publication on Eur. Phys. J.
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