A5025499082- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Scientific Research and Discoveries
- Radioactive Decay and Measurement Techniques
- High-Energy Particle Collisions Research
- Advanced Thermodynamics and Statistical Mechanics
- Superconducting and THz Device Technology
- Radiation Detection and Scintillator Technologies
- Solar and Space Plasma Dynamics
- Black Holes and Theoretical Physics
- Quantum, superfluid, helium dynamics
- Advanced NMR Techniques and Applications
- Quantum Mechanics and Applications
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Muon and positron interactions and applications
- Geophysics and Gravity Measurements
Artemis (United States)
2023
Universidad Nacional Autónoma de México
2010
Universidad de Zaragoza
1999-2008
Canfranc Underground Laboratory
2002-2003
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2002
Institute for Nuclear Research
2000
Campbell Collaboration
1997
University of South Carolina
1995-1996
Centre National de la Recherche Scientifique
1996
Université Paris Cité
1996
We have searched for solar axions or similar particles that couple to two photons by using the CERN Axion Solar Telescope (CAST) setup with improved conditions in all detectors. From absence of excess X-rays when magnet was pointing Sun, we set an upper limit on axion-photon coupling 8.8 x 10^{-11} GeV^{-1} at 95% CL m_a <~ 0.02 eV. This result is best experimental over a broad range axion masses and eV also supersedes previous derived from energy-loss arguments globular-cluster stars.
The International Germanium Experiment (IGEX) has analyzed 117 mol yr of 76Ge data from its isotopically enriched (86% 76Ge) germanium detectors. Applying pulse-shape discrimination to the more recent data, lower bound on half-life for neutrinoless double-beta decay is T1/2(0ν)>1.57×1025yr (90% C.L.). This corresponds an upper in Majorana neutrino mass parameter, ⟨mν⟩, between 0.33 and 1.35 eV, depending choice theoretical nuclear matrix elements used analysis.Received 29 October...
Hypothetical axionlike particles with a two-photon interaction would be produced in the sun by Primakoff process. In laboratory magnetic field ("axion helioscope"), they transformed into x-rays energies of few keV. Using decommissioned Large Hadron Collider test magnet, CERN Axion Solar Telescope ran for about 6 months during 2003. The first results from analysis these data are presented here. No signal above background was observed, implying an upper limit to axion-photon coupling...
We comment on the recent claim for experimental observation of neutrinoless double-beta decay. discuss several limitations in analysis provided that paper and conclude there is no basis presented claim.
The International Germanium Experiment (IGEX) has six HPGe detectors, isotopically enriched to 86% in ${}^{76}\mathrm{Ge},$ containing approximately 90 active moles of ${}^{76}\mathrm{Ge}.$ Three detectors 2 kg each operate the Canfranc Underground Laboratory (Spain) with pulse-shape analysis electronics. One detector (\ensuremath{\sim}0.7 volume) been operating Baksan Low-Background for several years, and two additional similar will Baksan. A maximum likelihood 74.84 mole years data yields...
Results are reported of an experimental search for the unique, rapidly varying temporal pattern solar axions coherently converting into photons via Primakoff effect in a single crystal germanium detector when incident at Bragg angle with crystalline plane. The analysis 1.94 kg yr data from 1 DEMOS Sierra Grande, Argentina, yields new laboratory bound by axion-photon coupling...
The first results are reported on the limit for neutrinoless double decay of 130Te obtained with new bolometric experiment CUORICINO. set-up consists 44 cubic crystals natural TeO2, 5 cm side and 18 3×3×6 cm3. Four these latter made isotopically enriched materials: two in 128Te others 130Te. With a sensitive mass ∼40 kg, our array is by far most massive running cryogenic detector to search rare events. operated at temperature ∼10 mK dilution refrigerator under heavy shield Gran Sasso...
We report the present results of CUORICINO, a search for neutrinoless double-beta (0nu betabeta) decay 130Te. The detector is an array 62 TeO2 bolometers with total active mass 40.7 kg. cooled by dilution refrigerator shielded from environmental radioactivity and energetic neutrons, operated at approximately 8 mK in Gran Sasso Underground Laboratory. No evidence was found new lower limit, T(1/2)(0nu) > or = 1.8 x 10(24) yr (90% C.L.) set, corresponding to [m(nu)] < 0.2 1.1 eV, depending on...
One IGEX 76Ge double-beta decay detector is currently operating in the Canfranc Underground Laboratory a search for dark matter WIMPs, through Ge nuclear recoil produced by WIMP elastic scattering. A new exclusion plot, σ(m), has been derived WIMP-nucleon spin-independent interactions. To obtain this result, 40 days of data from (energy threshold Ethr∼4 keV), recently collected, have analyzed. These improve limits all other ionization germanium detectors mass region 20 to 200 GeV, where...
The results of a search for particle dark matter with germanium detector at the Canfranc tunnel are reported. Contour limits cross sections, masses, and local halo densities particles interacting Ge nuclei through spin-independent interactions presented an exposure 130.7 kg day. prospects timing modulation signal also
This paper is a response to the preceding Comment by Klapdor-Kleingrothaus, Dietz, and Krivosheina. The criticisms are confronted, questions raised answered. We demonstrate that lower limit quoted IGEX, , correct there was no ``arithmetical error'' as claimed in ``Critical View'' article.