L. L. Kormos
A5072771670- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Planetary Science and Exploration
- Black Holes and Theoretical Physics
- Nuclear physics research studies
- Computational Physics and Python Applications
- Nuclear Physics and Applications
- Noncommutative and Quantum Gravity Theories
- Gamma-ray bursts and supernovae
- Advanced X-ray and CT Imaging
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Scientific Research and Discoveries
- Radiomics and Machine Learning in Medical Imaging
- X-ray Spectroscopy and Fluorescence Analysis
- Technology-Enhanced Education Studies
Lancaster University
2016-2025
Colorado State University
2023
University of Bern
2023
Albert Einstein College of Medicine
2023
Eötvös Loránd University
2023
Boston University
2013-2023
Duke University
2018-2023
Universidad Autónoma de Madrid
2018-2023
University of California, Irvine
2013-2023
Campbell Collaboration
2023
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...
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...
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...
The T2K experiment studies oscillations of an off-axis muon neutrino beam between the J-PARC accelerator complex and Super-Kamiokande detector. Special emphasis is placed on measuring mixing angle theta_13 by observing electron appearance via sub-dominant to oscillation, searching for CP violation in lepton sector. includes a sophisticated, off-axis, near detector, ND280, situated 280 m downstream production target order measure properties understand better interactions at energy scale below...
The next generation neutrino observatory proposed by the LBNO collaboration will address fundamental questions in particle and astroparticle physics. experiment consists of a far detector, its first stage 20 kt LAr double phase TPC magnetised iron calorimeter, situated at 2300 km from CERN near detector based on highpressure argon gas TPC. long baseline provides unique opportunity to study flavour oscillations over their 1st 2nd oscillation maxima exploring L/E behaviour, distinguishing...
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{...
This paper reports results from a search for nucleon decay through invisible modes, where no visible energy is directly deposited during the itself, initial water phase of $\mathrm{SNO}+$. However, such decays within oxygen nucleus would produce an excited daughter that subsequently deexcite, often emitting detectable gamma rays. A rays yields limits $2.5\ifmmode\times\else\texttimes\fi{}{10}^{29}\text{ }\text{ }\mathrm{y}$ at 90% Bayesian credibility level (with prior uniform in rate)...
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...
A facility that can deliver beams of electron and muon neutrinos from the decay a stored beam has potential to unambiguously resolve issue evidence for light sterile arises in short-baseline neutrino oscillation experiments estimates effective number flavors fits cosmological data. In this paper, we show nuSTORM facility, with muons $3.8\text{ }\mathrm{GeV}/\mathrm{c}\text{ }\ifmmode\pm\else\textpm\fi{}\text{ }10%$, will be able carry out conclusive appearance search test LSND MiniBooNE...
Upper limits on the ${\overline{\ensuremath{\nu}}}_{e}$ flux at Sudbury Neutrino Observatory have been set based charged-current reaction deuterium. The produces a positron and two neutrons in coincidence. This distinctive signature allows search with very low background for ${\overline{\ensuremath{\nu}}}_{e}$'s from Sun other potential sources. Both differential integral placed energy range 4--14.8 MeV. For an energy-independent...
Experimental tests of Lorentz symmetry in systems all types are critical for ensuring that the basic assumptions physics well founded. Data from phases Sudbury Neutrino Observatory, a kiloton-scale heavy water Cherenkov detector, analyzed possible violations neutrino sector. Such would appear as one eight signal detector: six seasonal variations solar electron survival probability differing energy and time dependence two shape changes to oscillated spectrum. No evidence such signals is...
We have performed three searches for high-frequency signals in the solar neutrino flux measured by Sudbury Neutrino Observatory (SNO), motivated possibility that $g$-mode oscillations could affect production or propagation of $^8$B neutrinos. The first search looked any significant peak frequency range 1/day to 144/day, with a sensitivity sinusoidal amplitudes 12% greater. second focused on regions which been claimed experiments aboard SoHO satellite, and was sensitive 10% third extra power...