1,166 research outputs found
European underground laboratories: An overview
Underground laboratories are complementary to those where the research in
fundamental physics is made using accelerators. This report focus on the
logistic and on the background features of the most relevant laboratories in
Europe, stressing also on the low background facilities available. In
particular the report is focus on the laboratories involved in the new
Europeean project ILIAS with the aim to support the European large
infrastructures operating in the astroparticle physics area.Comment: 9 pages, 6 figures, Invited talk: Topical Workshop in Low
Radioactivity Techniques (Sudbury, Canada) December 12-14, 2004. To be
publish in AIP conference proceeding
Neutrinos and (Anti)neutrinos from Supernovae and from the Earth in the Borexino detector
The main goal of the Borexino detector, in its final phase of construction in
the Gran Sasso underground laboratory, is the direct observation and
measurement of the low energy component of neutrinos coming from the Sun. The
unique low energy sensitivity and ultra-low background bring new capabilities
to attack problems in neutrino physiscs other than solar ones. Investigation
about the study of Supernoavae neutrinos and neutrino coming from the Earth
(Geoneutrinos) are here resumed.Comment: 7 pages, 6 figures, proceedings of the The 1st Yamada Symposium on
Neutrinos and Dark Matter in Nuclear Physics June 9-14, 2003, Nara Japa
Borexino: A real time liquid scintillator detector for low energy solar neutrino study
Borexino is a large unsegmented calorimeter featuring 300 tons of liquid
scintillator, contained in a 8.5 meter nylon vessel, viewed by 2200 PMTs. The
main goal of Borexino is the study, in real time, of low energy solar
neutrinos, and in particular, the monoenergetic neutrinos coming from ,
which is one of the missing links on the solar neutrino problem. The
achievement of high radiopurity level, in the order of of U/Th
equivalent, necessary to the detection of the low energy component of the solar
neutrino flux, was proved in the Borexino prototype: the Counting Test
Facility. The detector is located underground in the Laboratori Nazionali del
Gran Sasso in the center of Italy at 3500 meter water equivalent depth. In this
paper the science and technology of Borexino are reviewed and its main
capabilities are presented.Comment: 8 pages, 3 figures, 10th International Conference on Calorimetry in
High Energy Physics. http://3w.hep.caltech.edu/calor02
Status and potentialities of the JUNO experiment
One of the main open issues of neutrino physics is the determination of the
mass hierarchy, discriminating between the two possible ordering of the mass
eigenvalues, known as Normal and Inverted Hierarchies. The solution of this
puzzle would have a significant impact both on elementary particle physics and
astrophysics. A possible way to investigate the problem is the study, with
medium baseline reactor antineutrinos, of the mass dependent corrections to
inverse decays. This is the idea pursued by JUNO, a multipurpose
underground liquid scintillator experiment that will start data taking in very
few years from now. The main characteristics and the status of the experiment
are discussed here, together with its rich physics program. We focus in
particular on the potentiality for mass hierarchy determination, the main goal
of the experiment, on the oscillation parameters accurate measurements and on
the supernova and solar neutrinos and geoneutrino studies.Comment: Invited talk given, on behalf of the JUNO Collaboration, by Vito
Antonelli at the XVII International Workshop on Neutrino Telescopes (Venice,
13-17 March 2017
Solar Neutrino Physics: historical evolution, present status and perspectives
Solar neutrino physics is an exciting and difficult field of research for
physicists, where astrophysics, elementary particle and nuclear physics meet. \
The Sun produces the energy that life has been using on Earth for many years,
about y, emits a lot of particles: protons, electrons, ions,
electromagnetic quanta... among them neutrinos play an important role allowing
to us to check our knowledge on solar characteristics. The main aim of this
paper is to offer a practical overview of various aspects concerning the solar
neutrino physics: after a short historical excursus, the different detection
techniques and present experimental results and problems are analysed.
Moreover, the status of art of solar modeling, possible solutions to the so
called solar neutrino problem (SNP) and planned detectors are reviewed.Comment: 139 pages, 42 figure
Neutrino oscillations and Lorentz Invariance Violation in a Finslerian Geometrical model
Neutrino oscillations are one of the first evidences of physics beyond the
Standard Model (SM). Since Lorentz Invariance is a fundamental symmetry of the
SM, recently also neutrino physics has been explored to verify the eventual
modification of this symmetry and its potential magnitude. In this work we
study the consequences of the introduction of Lorentz Invariance Violation
(LIV) in the high energy neutrinos propagation and evaluate the impact of this
eventual violation on the oscillation predictions. An effective theory
explaining these physical effects is introduced via Modified Dispersion
Relations. This approach, originally introduced by Coleman and Glashow,
corresponds in our model to a modification of the special relativity geometry.
Moreover, the generalization of this perspective leads to the introduction of a
maximum attainable velocity which is specific of the particle. This can be
formalized in Finsler geometry, a more general theory of space-time. In the
present paper the impact of this kind of LIV on neutrino phenomenology is
studied, in particular by analyzing the corrections introduced in neutrino
oscillation probabilities for different values of neutrino energies and
baselines of experimental interest. The possibility of further improving the
present constraints on CPT-even LIV coefficients by means of our analysis is
also discussed.Comment: Accepted for publication with minor revisions, will appear on
European Physics Journal
Status and the perspectives of the Jiangmen Underground Neutrino Observatory (JUNO)
One of the remaining undetermined fundamental aspects in neutrino physics is the determination of the neutrino mass hierarchy, i.e. discriminating between the two possible orderings of the mass eigenvalues, known as Normal and Inverted Hierarchies. The Jiangmen Underground Neutrino Observatory (JUNO), a 20 kt Liquid Scintillator Detector currently under construction in the South of China, can determine the neutrino mass hierarchy and improve the precision of three oscillation parameters by one order of magnitude. Moreover, thanks to its large liquid scintillator mass, JUNO will also contribute to study neutrinos from non-reactor sources such as solar neutrinos, atmospheric neutrinos, geoneutrinos, supernova burst and diffuse supernova neutrinos. Furthermore, JUNO will also contribute to nucleon decay studies. In this work, I will describe the status and the perspectives of the JUNO experiment
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