L. A. Winslow
A5077269490- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Medical Imaging and Pathology Studies
- Nuclear physics research studies
- Medical Imaging Techniques and Applications
- Nuclear Physics and Applications
- Cancer Treatment and Pharmacology
- Scientific Computing and Data Management
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Computational Physics and Python Applications
- Superconducting Materials and Applications
- Quantum, superfluid, helium dynamics
- Superconducting and THz Device Technology
- International Science and Diplomacy
- Muon and positron interactions and applications
- Methane Hydrates and Related Phenomena
- Scientific Research and Discoveries
- Astronomy and Astrophysical Research
Massachusetts Institute of Technology
2015-2024
Gran Sasso Science Institute
2021
Institut de Recherche sur les Lois Fondamentales de l'Univers
2021
Université Paris-Saclay
2021
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2021
University of California, Berkeley
2004-2021
Université Claude Bernard Lyon 1
2021
Centre National de la Recherche Scientifique
2021
Kurchatov Institute
2021
Technical University of Munich
2021
KamLAND has measured the flux of nu;(e)'s from distant nuclear reactors. We find fewer nu;(e) events than expected standard assumptions about propagation at 99.95% C.L. In a 162 ton.yr exposure ratio observed inverse beta-decay to number without disappearance is 0.611+/-0.085(stat)+/-0.041(syst) for energies >3.4 MeV. context two-flavor neutrino oscillations with CPT invariance, all solutions solar problem except "large mixing angle" region are excluded.
We present results of a study neutrino oscillation based on 766 ton-year exposure KamLAND to reactor anti-neutrinos. observe 258 \nuebar\ candidate events with energies above 3.4 MeV compared 365.2 expected in the absence oscillation. Accounting for 17.8 background events, statistical significance \nuebar disappearance is 99.998%. The observed energy spectrum disagrees spectral shape at 99.6% and prefers distortion from effects. A two-neutrino analysis data gives \DeltaMSq =...
We present an improved search for neutrinoless double-beta (0νββ) decay of ^{136}Xe in the KamLAND-Zen experiment. Owing to purification xenon-loaded liquid scintillator, we achieved a significant reduction ^{110m}Ag contaminant identified previous searches. Combining results from first and second phase, obtain lower limit 0νββ half-life T_{1/2}^{0ν}>1.07×10^{26} yr at 90% C.L., almost sixfold improvement over limits. Using commonly adopted nuclear matrix element calculations, corresponding...
The KamLAND experiment has determined a precise value for the neutrino oscillation parameter Deltam21(2) and stringent constraints on theta12. exposure to nuclear reactor antineutrinos is increased almost fourfold over previous results 2.44 x 10(32) proton yr due longer livetime an enlarged fiducial volume. An undistorted nu[over]e energy spectrum now rejected at >5sigma. Analysis of above inverse beta decay threshold, including geoneutrinos, gives best fit...
The available data on nuclear fusion cross sections important to energy generation in the Sun and other hydrogen-burning stars solar neutrino production are summarized critically evaluated. Recommended values uncertainties provided for key sections, a recommended spectrum is given $^{8}\mathrm{B}$ neutrinos. Opportunities further increasing precision of rates also discussed, including new facilities, experimental techniques, improvements theory. This review, which summarizes conclusions...
The axion is a promising dark matter candidate, which was originally proposed to solve the strong-CP problem in particle physics. To date, available parameter space for and axionlike relatively unexplored, particularly at masses m_{a}≲1 μeV. ABRACADABRA new experimental program search over broad range of masses, 10^{-12}≲m_{a}≲10^{-6} eV. ABRACADABRA-10 cm small-scale prototype future detector that could be sensitive QCD axion. In this Letter, we present first results from 1 month axions...
The KamLAND-Zen experiment has provided stringent constraints on the neutrinoless double-beta (0νββ) decay half-life in ^{136}Xe using a xenon-loaded liquid scintillator. We report an improved search upgraded detector with almost double amount of xenon and ultralow radioactivity container, corresponding to exposure 970 kg yr ^{136}Xe. These new data provide valuable insight into backgrounds, especially from cosmic muon spallation xenon, have required use novel background rejection...
Two of the most pressing questions in physics are microscopic nature dark matter that comprises 84% mass universe and absence a neutron electric dipole moment. These would be resolved by existence hypothetical particle known as quantum chromodynamics (QCD) axion. In this work, we probe hypothesis axions constitute matter, using ABRACADABRA-10cm experiment broadband configuration, with world-leading sensitivity. We find no significant evidence for axions, present 95% upper limits on...
Radioactive isotopes produced through cosmic muon spallation are a background for rare-event detection in $\nu$ detectors, double-$\beta$-decay experiments, and dark-matter searches. Understanding the nature of cosmogenic backgrounds is particularly important future experiments aiming to determine pep CNO solar neutrino fluxes, which dominated by production $^{11}$C. Data from Kamioka liquid-scintillator antineutrino detector (KamLAND) provides valuable information better understanding these...
We present the potential sensitivity of a future recoil detector for first detection process coherent elastic neutrino nucleus scattering (CEνNS). use Chooz reactor complex in France as our luminous source neutrinos. Leveraging ability to cleanly separate rate correlated with thermal power against (uncorrelated) backgrounds, we show that 10 kg cryogenic bolometric array 100 eV threshold should be able extract CEνNS signal within one year running.
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...
Abstract CUPID-Mo is a bolometric experiment to search for neutrinoless double-beta decay ( $$0\nu \beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>0</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:mrow></mml:math> ) of $$^{100}\hbox {Mo}$$ xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow /><mml:mn>100</mml:mn></mml:msup><mml:mtext>Mo</mml:mtext></mml:mrow></mml:math> . In this article, we detail the detector...
Abstract The next core-collapse supernova in the Milky Way or its satellites will represent a once-in-a-generation opportunity to obtain detailed information about explosion of star and provide significant scientific insight for variety fields because extreme conditions found within. Supernovae our galaxy are not only rare on human timescale but also happen at unscheduled times, so it is crucial be ready use all available instruments capture possible from event. first indication potential...
The CUPID-Mo experiment at the Laboratoire Souterrain de Modane (France) is a demonstrator for CUPID, next-generation ton-scale bolometric $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ experiment. It consists of 4.2 kg array 20 enriched ${\mathrm{Li}}_{2}$$^{100}\mathrm{Mo}{\mathrm{O}}_{4}$ scintillating bolometers to search lepton-number-violating process decay in $^{100}\mathrm{Mo}$. With more than one year operation ($^{100}\mathrm{Mo}$ exposure $1.17\text{ }\text{...
The QCD axion is one of the most compelling candidates to explain dark matter abundance universe. With its extremely small mass ($\ll 1\,\mathrm{eV}/c^2$), interacts as a classical field rather than particle. Its coupling photons leads modification Maxwell's equations that can be measured with sensitive readout circuits. DMRadio-m$^3$ next-generation search for below $1\,\mu$eV using $>4$ T static magnetic field, coaxial inductive pickup, tunable LC resonator, and DC-SQUID readout. It...
Abstract The CUPID-Mo experiment to search for 0 $$\nu \beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>ν</mml:mi> <mml:mi>β</mml:mi> </mml:mrow> </mml:math> decay in $$^{100}$$ <mml:msup> <mml:mrow /> <mml:mn>100</mml:mn> </mml:msup> Mo has been recently completed after about 1.5 years of operation at Laboratoire Souterrain de Modane (France). It served as a demonstrator CUPID, next generation experiment. was comprised 20 enriched $$\hbox {Li}_{{2}}$$...
The QCD axion is a leading dark matter candidate that emerges as part of the solution to strong CP problem in Standard Model. coupling photons most common experimental probe, but much parameter space remains unexplored. Model scales linearly with mass; therefore, highly-motivated region 0.4-120 neV, corresponding GUT-scale axion, particularly difficult reach. This paper presents design requirements for definitive search axions and reviews technological advances needed enable this program.
Data corresponding to a KamLAND detector exposure of 0.28 kton yr has been used search for nu;(e)'s in the energy range 8.3<E(nu;(e))<14.8 MeV. No candidates were found an expected background 1.1+/-0.4 events. This result can be obtain limit on nu;(e) fluxes any origin. Assuming that all flux its origin Sun and characteristic 8B solar nu(e) spectrum, we upper 3.7 x 10(2) cm(-2) s(-1) (90% C.L.) flux. We interpret this limit, 2.8 10(-4) standard model flux, framework spin-flavor precession...
This paper introduces a novel, high-intensity source of electron antineutrinos from the production and subsequent decay 8Li. When paired with an existing ~1 kton scintillator-based detector, this <E_\nu>=6.4 MeV opens wide range possible searches for beyond standard model physics via studies inverse beta interaction. In particular, experimental design described here has unprecedented sensitivity to antineutrino disappearance at $\Delta m^2\sim$ 1 eV$^2$ features ability distinguish between...
We report a measurement of the neutrino-electron elastic scattering rate from ${}^{8}$B solar neutrinos based on 123 kton-day exposure KamLAND. The background-subtracted electron recoil rate, above 5.5-MeV analysis threshold is 1.49 $\ifmmode\pm\else\textpm\fi{}$ 0.14(stat) 0.17(syst) events per kton-day. Interpreted as due to pure flavor flux with neutrino spectrum, this corresponds spectrum integrated 2.77 0.26(stat) 0.32(syst) $\ifmmode\times\else\texttimes\fi{}$10${}^{6}$...
We report a measurement of the neutrino-electron elastic scattering rate 862 keV 7Be solar neutrinos based on 165.4 kton-day exposure KamLAND. The observed is 582 +/- 90 (kton-day)^-1, which corresponds to neutrino flux (3.26 0.50) x 10^9 cm^-2s^-1, assuming pure electron flavor flux. Comparing this with standard model prediction and further three mixing, nu_e survival probability 0.66 0.14 determined from KamLAND data. Utilizing global oscillation analysis, we obtain total (5.82 0.98)...
We present a precision analysis of the $^{136}$Xe two-neutrino $\beta\beta$ electron spectrum above 0.8 MeV, based on high-statistics data obtained with KamLAND-Zen experiment. An improved formalism for rate allows us to measure ratio leading and subleading $2\nu\beta\beta$ nuclear matrix elements (NMEs), $\xi^{2\nu}_{31} = -0.26^{+0.31}_{-0.25}$. Theoretical predictions from shell model majority quasiparticle random-phase approximation (QRPA) calculations are consistent experimental limit....
Abstract We report the measurement of two-neutrino double-beta ( $$2\nu \beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>2</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:mrow></mml:math> ) decay $$^{100}$$ xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow /><mml:mn>100</mml:mn></mml:msup></mml:math> Mo to ground state Ru using lithium molybdate $$\hbox {Li}_2^{\;\;100}\hbox {MoO}_4$$...