Showing papers by "Petr Vogel published in 2002"
Journal Article•
2,092 citations
Pacific Northwest National Laboratory1, University of South Carolina2, California Institute of Technology3, University of Chicago4, University of Washington5, Osaka University6, International Institute of Minnesota7, Istituto Nazionale di Fisica Nucleare8, Brown University9, Stanford University10, University of California, Irvine11, University of Zaragoza12, University of Alabama13, Duke University14
TL;DR: In this article, the authors discuss several limitations in the analysis provided in that paper and conclude that there is no basis for the presented claim, and they further conclude that such a claim cannot be supported by the experimental observation of double-beta decay.
Abstract: We comment on the recent claim for the experimental observation of neutrinoless double-beta decay. We discuss several limitations in the analysis provided in that paper and conclude that there is no basis for the presented claim.
188 citations
TL;DR: The status of neutrino oscillation searches employing nuclear reactors as sources is reviewed in this article, where the authors present a detailed review of the current state of the art in the field.
Abstract: The status of neutrino oscillation searches employing nuclear reactors as sources is reviewed. This technique, a direct continuation of the experiments that proved the existence of neutrinos, is today an essential tool in investigating the indications of oscillations found in studying neutrinos produced in the sun and in the earth’s atmosphere. The low energy of the reactor νe makes them ideal for exploring oscillations with small mass differences and relatively large mixing angles. In the last several years the determination of the reactor antineutrino flux and spectrum has reached a high degree of accuracy. Hence measurements of these quantities at a given distance L can be readily compared with the expectation at L=0, thus testing the disappearance of νe. Two recent experiments, CHOOZ and PALO VERDE, with baselines of about 1 km and sensitive to the neutrino mass differences associated with the atmospheric neutrino anomaly have collected data and published results recently. An ambitious project with a baseline of more than 100 km, KAMLAND, has now began to take data. This last reactor experiment will have a sensitivity sufficient to explore part of the oscillation phase space relevant to solar neutrino scenarios. It is the only envisioned experiment with a terrestrial source of neutrinos capable of addressing the solar neutrino puzzle.
149 citations
TL;DR: In this article, the neutrino-proton elastic scattering was used for the detection of supernova neutrinos in scintillator detectors, which solved the long-standing problem of how to separately measure the total energy and temperature of νμ, ντ, etc.
Abstract: We propose that neutrino-proton elastic scattering, ν+p→ν+p, can be used for the detection of supernova neutrinos in scintillator detectors. Though the proton recoil kinetic energy spectrum is soft, with Tp≃2Eν2/Mp, and the scintillation light output from slow, heavily ionizing protons is quenched, the yield above a realistic threshold is nearly as large as that from νe+p→e++n. In addition, the measured proton spectrum is related to the incident neutrino spectrum, which solves a long-standing problem of how to separately measure the total energy and temperature of νμ, ντ, νμ, and ντ. The ability to detect this signal would give detectors like KamLAND and Borexino a crucial and unique role in the quest to detect supernova neutrinos.
137 citations
TL;DR: In this article, the authors estimate possible delayed β decay signatures of the neutrino induced reactions on 16O in a two-step model: the primary neutrinos (ν,l) process, where l is the lepton in the final state, is described within the random phase approximation, while the subsequent decay of the excited nuclear state in the last channel is treated within the statistical model.
Abstract: We estimate possible delayed β decay signatures of the neutrino induced reactions on 16O in a two-step model: the primary neutrino (ν,l) process, where l is the lepton in the final state, is described within the random phase approximation, while the subsequent decay of the excited nuclear state in the final channel is treated within the statistical model. We calculate partial reaction cross sections leading to β unstable nuclei. We consider neutrino energies up to 500 MeV, relevant for atmospheric neutrino detection in Super-Kamiokande, and supernova neutrino spectra.
80 citations
TL;DR: In this article, the effect of the bremsstrahlung detection threshold on the neutrino-deuterium disintegration was investigated, and it was shown that for a realistic choice of the threshold and for the actual electron energy threshold of the SNO detector, the deduced B-8 flux should be decreased by about 2%.
Abstract: The radiative corrections of order alpha for the charged- and neutral-current neutrino-deuterium disintegration for energies relevant to the SNO experiment are evaluated. Particular attention is paid to the issue of the bremsstrahlung detection threshold. It is shown that the radiative corrections to the total cross section for the charged current reaction are independent of that threshold, as they must be for consistency, and amount to a slowly decreasing function of the neutrino energy E-nu, varying from about 4% at low energies to 3% at the end of the B-8 spectrum. The differential cross section corrections, on the other hand, do depend on the bremsstrahlung detection threshold. Various choices of the threshold are discussed. It is shown that for a realistic choice of the threshold and for the actual electron energy threshold of the SNO detector, the deduced B-8 nu(e) flux should be decreased by about 2%. The radiative corrections to the neutral-current reaction are also evaluated.
38 citations
TL;DR: In this paper, the neutrino-deuteron breakup cross-sections crucial to the Sudbury Neutrino Observatory's efforts to measure the solar neutrinos flux were discussed.
31 citations
Pacific Northwest National Laboratory1, University of South Carolina2, California Institute of Technology3, University of Chicago4, University of Washington5, International Institute of Minnesota6, Osaka University7, Istituto Nazionale di Fisica Nucleare8, Brown University9, Stanford University10, University of California, Irvine11, University of Zaragoza12, University of Alabama13, Duke University14
TL;DR: In this article, the authors discuss several limitations in the analysis provided in that paper and conclude that there is no basis for the presented claim, and they further conclude that such a claim cannot be supported by the experimental observation of double-beta decay.
Abstract: We comment on the recent claim for the experimental observation of neutrinoless double-beta decay. We discuss several limitations in the analysis provided in that paper and conclude that there is no basis for the presented claim.
31 citations
TL;DR: In this paper, the neutrino-deuteron breakup cross-sections crucial to the Sudbury Neutrino Observatory's efforts to measure the solar neutrinos flux were discussed.
Abstract: We discuss how to reduce theoretical uncertainties in the neutrino-deuteron breakup cross-sections crucial to the Sudbury Neutrino Observatory's efforts to measure the solar neutrino flux. In effective field theory, the dominant uncertainties in all neutrino-deuteron reactions can be expressed through a single, common, isovector axial two-body current parameterized by $L_{1,A}$. After briefly reviewing the status of fixing $L_{1,A}$ experimentally, we present a constraint on $L_{1,A}$ imposed by existing reactor antineutrino-deuteron breakup data. This constraint alone leads to an uncertainty of 6-7% at 7 MeV neutrino energy in the cross-sections relevant to the Sudbury Neutrino Observatory. However, more significantly for the Sudbury experiment, the constraint implies an uncertainty of only 0.7% in the ratio of charged to neutral current cross-sections used to verify the existence of neutrino oscillations, at the same energy. This is the only direct experimental constraint from the two-body system, to date, of the uncertainty in these cross-sections.
27 citations
01 Sep 2002-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: In this article, the authors investigated the energy spectrum and angular distribution of spallation neutrons produced by 190 GeV/c muons scattering on carbon, copper and lead targets, and reported the result of their measurement of the neutron production differential cross section.
Abstract: The production of fast neutrons (1 MeV - 1 GeV) in high energy muon-nucleus interactions is poorly understood, yet it is fundamental to the understanding of the background in many underground experiments. The aim of the present experiment (CERN NA55) was to measure spallation neutrons produced by 190 GeV/c muons scattering on carbon, copper and lead targets. We have investigated the energy spectrum and angular distribution of spallation neutrons, and we report the result of our measurement of the neutron production differential cross section.
17 citations
TL;DR: In this article, the set of observables needed to constrain the models of supernova neutrino emission is discussed, which are the flux normalizations, and average energies, of each of the three expected components of the neutrinos flux.