487 research outputs found
AMS status and results after four years of operations on the ISS
The Alpha Magnetic Spectrometer (AMS) is the major particle
physics experiment in space. In its first four years in orbit, on the International Space Station (ISS), AMS has collected more than 60 billion cosmic ray events up to multi-TeV energies. Status and results will be presented
Experimental gravitation and geophysics
Seismic noise is the major obstacle to performing sensitive
measurements of the gravitational field on the ground. The INFN (Istituto Nazionale di Fisica Nucleare) underground laboratory in Gran Sasso, L’Aquila(Italy), seems to be a favourable place from the environmental noise point of view.
This paper describes briefly two, relatively low cost, gravity experiments that can be performed in the underground laboratory: a) A measurement of preferred-frame and preferred-location effects. b) A test of the equivalence principle. Preliminary experimental data of the seismic noise are also presented
DAMA/NaI results
The DAMA/NaI set-up of the DAMA experiment has been operative during seven
annual cycles and has investigated several rare processes. In particular, it
has been realised in order to investigate the model independent annual
modulation signature for Dark Matter particles in the galactic halo. With the
total exposure collected in the seven annual cycles (107731 kg day) a model
independent evidence for the presence of a Dark Matter particle component in
the galactic halo has been pointed out at 6.3 sigma C.L.. Some of the many
possible corollary model dependent quests for the candidate particle have been
presented as well.Comment: Contributed paper to the Rencontres de Moriond "Electroweak
Interactions and Unified Theories", La Thuile, Aosta Valley, Italy, March
200
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.
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
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