3,310 research outputs found
The Antares neutrino detector
The Antares neutrino telescope, operating at 2.5 km depth in the Mediterranean Sea, 40km off the Toulon shore, represents the worlds largest operational underwater neutrino telescope, optimised for the detection of Cherenkov light produced by neutrino-induced muons. The neutrinos momentum is transferred to the muons allowing for reconstruction of the direction of the neutrino. The main
goal of Antares is the search of high-energy neutrinos from astrophysical point or transient sources. Antares has been taking data in its full 12 lines configuration since May 2008: in these Proceedings the description of the detector and its performances will be presented while first preliminary results on neutrino events will be discussed
The Antares neutrino detector
The Antares neutrino telescope, operating at 2.5 km depth in the Mediterranean Sea, 40km off the Toulon shore, represents the worlds largest operational underwater neutrino telescope, optimised for the detection of Cherenkov light produced by neutrino-induced muons. The neutrinos momentum is transferred to the muons allowing for reconstruction of the direction of the neutrino. The main
goal of Antares is the search of high-energy neutrinos from astrophysical point or transient sources. Antares has been taking data in its full 12 lines configuration since May 2008: in these Proceedings the description of the detector and its performances will be presented while first preliminary results on neutrino events will be discussed
The proton structure function F2 in the resonance region
Unique measurement of the proton structure function F2 in a wide
two-dimensional region of x and Q**2 has been reported. The accessible
kinematics covers entire resonance region up to W=2.5 GeV in the Q**2 interval
from 0.1 to 4.5 GeV**2. Obtained data allowed for the first time an evaluation
of moments of the structure function F2 directly from experimental data as well
as an intensive study of the Bloom-Gilman duality phenomenon.Comment: 6 pages, 4 figures, Proceedings of GDH2002 Conference, 3-6 July 2002,
Genova, Italy, to be published in World Scientifi
Quasi-elastic and inelastic inclusive electron scattering from an oxygen jet target
The results of an experiment on inclusive electron scattering from an oxygen
jet target, performed in a wide range of energy and momentum transfer covering
both quasi-elastic and (1232) resonance regions, are reported. In the
former region the theoretical predictions, obtained including effects of
nucleon-nucleon correlations in both initial and final states, give a good
description of the experimental data. In the inelastic region a broadening as
well as a damping of the resonant part of the cross section with respect to the
free nucleon case is observed. The need of more detailed calculations including
nuclear structure effects on the electroproduction cross section of nucleon
resonances is highlighted.Comment: to appear in Nucl. Phys.
Comment on âObservation of a Narrow Structure in \u3csup\u3e1\u3c/sup\u3eH(Îł,K\u3csub\u3eS\u3c/sub\u3e\u3csup\u3e0\u3c/sup\u3e)\u3cem\u3eX\u3c/em\u3e via Interference with \u3cem\u3eÏ\u3c/em\u3e-Meson Productionâ
In Ref. [1], the authors claim to observe a narrow structure in the mass spectrum constructed from the (pKL) system using data from the CLAS detector. The interpretation of this narrow structure given in Ref. [1] is as follows: âIt may be due to the photoproduction of the Î+pentaquark or some unknown ÎŁ* resonance.â The authors go on to say that âit is unlikely for the observed structure to be due to a ÎŁ* resonance.
Bloom-Gilman duality of inelastic structure functions in nucleon and nuclei
The Bloom-Gilman local duality of the inelastic structure function of the
proton, the deuteron and light complex nuclei is investigated using available
experimental data in the squared four-momentum transfer range from 0.3 to 5
(GeV/c)**2. The results of our analysis suggest that the onset of the
Bloom-Gilman local duality is anticipated in complex nuclei with respect to the
case of the protonand the deuteron. A possible interpretation of this result in
terms of a rescaling effect is discussed with particular emphasis to the
possibility of reproducing the damping of the nucleon-resonance transitions
observed in recent electroproduction data off nuclei.Comment: revised version, to appear in Physical Review
Lepton-nucleus scattering in the impulse approximation regime
We discuss theoretical calculations of electron- and neutrino-nucleus
scattering, carried out using realistic nuclear spectral functions and
including the effect of final state interactions. Comparison between electron
scattering data and the calculated inclusive cross sections off oxygen shows
that the Fermi gas model fails to provide a satisfactory description of the
measured cross sections, and inclusion of nuclear dynamics is needed. The role
of Pauli blocking in charged-current neutrino induced reactions at low is
also analyzed.Comment: To be published in the Proceedings of NUFACT05 (Nucl. Phys. B,
Proceedings Supplements
The Water Properties of the Site in Capo Passero using the LED Beacon of the Prototype Tower
In that work we study the scattering parameters of the water on the KM3Net site in Capo Passero. To this purpose we compare the real data from the time calibration runs of the detector to the results of a simulations of the light emission, propagation and detection according to the expeimental apparatus
Spin observables for pion photoproduction on the deuteron in the (1232)-resonance region
Spin observables for the three charge states of the pion for the pion
photoproduction reaction on the deuteron, , with polarized
photon beam and/or oriented deuteron target are predicted. For the beam-target
double-spin asymmetries, it is found that only the longitudinal asymmetries
and do not vanish, whereas all the circular
and the other longitudinal asymmetries do vanish. The sensitivity of spin
observables to the model deuteron wave function is investigated. It has been
found that only and are sensitive to the model deuteron wave
function, in particular in the case of -production above the
-region, and that other asymmetries are not.Comment: 16 pages, 8 figures, accepted for publication in J. Phys. G: Nucl.
Part. Phy
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