J. Maneira
A5065707276- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Distributed and Parallel Computing Systems
- Muon and positron interactions and applications
- Nuclear Physics and Applications
- advanced mathematical theories
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Medical Imaging Techniques and Applications
- Atmospheric Ozone and Climate
- Structural Analysis of Composite Materials
- Advanced Data Storage Technologies
- Quantum, superfluid, helium dynamics
- Nuclear reactor physics and engineering
- Particle Accelerators and Free-Electron Lasers
LIP - Laboratory of Instrumentation and Experimental Particle Physics
2016-2025
University of Lisbon
2016-2025
The University of Adelaide
2013-2019
Northern Illinois University
2016-2019
University College London
2019
Campbell Collaboration
2018
University of Belgrade
2014-2017
Lomonosov Moscow State University
2014-2016
University of Toronto
2015-2016
Universidad de Granada
2009-2016
The Sudbury Neutrino Observatory has precisely determined the total active (nu(x)) 8B solar neutrino flux without assumptions about energy dependence of nu(e) survival probability. measurements were made with dissolved NaCl in heavy water to enhance sensitivity and signature for neutral-current interactions. is found be 5.21 +/- 0.27(stat)+/-0.38(syst) x 10(6) cm(-2) s(-1), agreement previous standard models. A global analysis these other reactor results yields Deltam(2)=7.1(+1.2)(-0.6)...
Results are reported from the complete salt phase of Sudbury Neutrino Observatory experiment in which NaCl was dissolved D$_2$O target. The addition enhanced signal neutron capture, as compared to pure detector. By making a statistical separation charged-current events other types based on event-isotropy criteria, effective electron recoil energy spectrum has been extracted. In units $ 10^6$ cm$^{-2}$ s$^{-1}$, total flux active-flavor neutrinos $^8$B decay Sun is found be...
We report results from a combined analysis of solar neutrino data all phases the Sudbury Neutrino Observatory (SNO). By exploiting particle identification information obtained proportional counters installed during third phase, this improved background rejection in that phase experiment. The SNO resulted total flux active flavors ${}^{8}\mathrm{B}$ decays Sun...
We report the direct measurement of 7Be solar neutrino signal rate performed with Borexino detector at Laboratori Nazionali del Gran Sasso. The interaction 0.862 MeV neutrinos is 49+/-3stat+/-4syst counts/(day.100 ton). hypothesis no oscillation for inconsistent our 4sigma C.L. Our result first survival probability nu(e) in transition region between matter-enhanced and vacuum-driven oscillations. improves experimental determination flux 7Be, pp, CNO nu(e), limit on effective magnetic moment...
The Sudbury Neutrino Observatory (SNO) used an array of 3He proportional counters to measure the rate neutral-current interactions in heavy water and precisely determined total active (nu_x) 8B solar neutrino flux. This technique is independent previous methods employed by SNO. flux found be 5.54_-0.31;+0.33(stat)-0.34+0.36(syst)x10(6) cm(-2) s(-1), agreement with measurements standard models. A global analysis reactor results yields Deltam2=7.59_-0.21;+0.19x10(-5) eV2 theta=34.4_-1.2;+1.3...
SNO+ is a large liquid scintillator-based experiment located 2km underground at SNOLAB, Sudbury, Canada. It reuses the Sudbury Neutrino Observatory detector, consisting of 12m diameter acrylic vessel which will be filled with about 780 tonnes ultra-pure scintillator. Designed as multipurpose neutrino experiment, primary goal search for neutrinoless double-beta decay (0$\nu\beta\beta$) 130Te. In Phase I, detector loaded 0.3% natural tellurium, corresponding to nearly 800 kg 130Te, an expected...
Results are reported from a joint analysis of Phase I and II data the Sudbury Neutrino Observatory. The effective electron kinetic energy threshold used is ${T}_{\mathrm{eff}}=3.5$ MeV, lowest yet achieved with water Cherenkov detector data. In units ${10}^{6}$ cm${}^{\ensuremath{-}2}$ ${\mathrm{s}}^{\ensuremath{-}1}$, total flux active-flavor neutrinos $^{8}\mathrm{B}$ decay in Sun measured using neutral current (NC) reaction on deuterons, no constraint neutrino spectrum, found to be...
Abstract New developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic sorting have opened up the possibility for building a large-scale detector that can discriminate between Cherenkov scintillation signals. Such could reconstruct particle direction species using light while also having excellent energy resolution low threshold of scintillator detector. Situated deep underground, utilizing new techniques computing reconstruction, this achieve unprecedented...
This paper details the solar neutrino analysis of 385.17-day Phase-III data set acquired by Sudbury Neutrino Observatory (SNO). An array $^3$He proportional counters was installed in heavy-water target to measure precisely rate neutrino-deuteron neutral-current interactions. technique determine total active $^8$B flux largely independent methods employed previous phases. The neutrinos measured be $5.54^{+0.33}_{-0.31}(stat.)^{+0.36}_{-0.34}(syst.)\times 10^{6}$ cm$^{-2}$ s$^{-1}$, consistent...
Neutron-antineutron oscillations in nature would violate baryon number and indicate a potential underlying mechanism for the observed matter-antimatter asymmetry. Sudbury Neutrino Observatory reports limits on neutron-antineutron first time deuteron. These establish important constraints beyond-the-Standard-Model scenarios that involve baryon-number violation.
The direction of individual <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mmultiscripts><a:mrow><a:mi mathvariant="normal">B</a:mi></a:mrow><a:mprescripts/><a:none/><a:mrow><a:mn>8</a:mn></a:mrow></a:mmultiscripts></a:mrow></a:math> solar neutrinos has been reconstructed using the <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"><d:mrow><d:mi>SNO</d:mi><d:mo>+</d:mo></d:mrow></d:math> liquid scintillator detector. Prompt, directional...
Abstract The SNO $$+$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>+</mml:mo> </mml:math> collaboration reports its first spectral analysis of long-baseline reactor antineutrino oscillation using 114 tonne-years data. Fitting the neutrino probability to observed energy spectrum yields constraints on mass-squared difference $$\Delta m^2_{21}$$ <mml:mrow> <mml:mi>Δ</mml:mi> <mml:msubsup> <mml:mi>m</mml:mi> <mml:mn>21</mml:mn> <mml:mn>2</mml:mn> </mml:msubsup> </mml:mrow>...
The long baseline between Earth and the Sun makes solar neutrinos an excellent test beam for exploring possible neutrino decay. signature of such decay would be energy-dependent distortion traditional survival probability which can fit using well-developed high-precision analysis methods. Here a model including is to all three phases 8B data taken by Sudbury Neutrino Observatory (SNO). This constrains lifetime mass state ν2 >8.08×10−5 s/eV at 90% confidence. An combining this SNO result with...
A measurement of the $^{8}\mathrm{B}$ solar neutrino flux has been made using a 69.2 kt-day dataset acquired with $\mathrm{SNO}+$ detector during its water commissioning phase. At energies above 6 MeV is an extremely pure sample elastic scattering events, owing primarily to detector's deep location, allowing accurate relatively little exposure. In that energy region best fit background rate $0.2{5}_{\ensuremath{-}0.07}^{+0.09}\text{ }\text{...
The SNO+ Collaboration reports the first evidence of reactor antineutrinos in a Cherenkov detector. nearest nuclear reactors are located 240 km away Ontario, Canada. This analysis uses events with energies lower than any previous large water Two analytical methods used to distinguish from background 190 days data and yield consistent for combined significance 3.5σ.
A search has been made for neutrinos from the hep reaction in Sun and diffuse supernova neutrino background (DSNB) using data collected during first operational phase of Sudbury Neutrino Observatory, with an exposure 0.65 kilotonne-years. For search, two events are observed effective electron energy range 14.3 MeV <T_eff< 20 where 3.1 expected. After accounting oscillations, upper limit 2.3x10^4 cm^-2s^-1 at 90% confidence level is inferred on integral total flux neutrinos. DSNB neutrinos,...
A search has been made for sinusoidal periodic variations in the $^8$B solar neutrino flux using data collected by Sudbury Neutrino Observatory over a 4-year time interval. The variation at period of one year is consistent with modulation Earth's orbital eccentricity. No significant periodicities are found periods between 1 day and 10 years either an unbinned maximum likelihood analysis or Lomb-Scargle periodogram analysis. inconsistent hypothesis that results recent Sturrock et al., based...
Results are reported on the measurement of atmospheric neutrino-induced muon flux at a depth 2 kilometers below Earth's surface from 1229 days operation Sudbury Neutrino Observatory (SNO). By measuring through-going muons as function zenith angle, SNO experiment can distinguish between oscillated and unoscillated portion neutrino flux. A total 514 muonlike events measured $\ensuremath{-}1\ensuremath{\le}\mathrm{cos}{\ensuremath{\theta}}_{\mathrm{zenith}}\ensuremath{\le}0.4$ in exposure...