Tag

Neutrino

All articles tagged with #neutrino

space1 month ago•13 min saved

Earth-Directed Blazar Jets May Explain Record Ultra-High-Energy Neutrino

A 220 PeV neutrino detected by KM3NeT in 2023 is examined for origins; a population of blazars—jets from active galactic nuclei aimed at Earth—could account for such events without exceeding the extragalactic gamma-ray background measured by Fermi, though no electromagnetic counterpart was found and IceCube’s non-detection constrains the scenario. The study shows the blazar-population model is plausible within a defined parameter range and highlights the need for future KM3NeT upgrades and more data to confirm or refute this diffuse-origin explanation.

via Space Daily|

#blazar #gamma-ray-background #icecube

science2 months ago•38 min saved

Orbiting Neutrino Detector Opens New Window on the Cosmos

Scientists have launched the world’s first space-based neutrino detector into orbit, a milestone for neutrino astronomy. The instrument is designed to capture high-energy neutrinos from cosmic sources, offering new insights into extreme astrophysical events and the fundamental workings of the universe.

via Yahoo|

#astrophysics #detector #launch

science2 months ago•35 min saved

Right-Handed Neutrinos Hint at a Hidden Dimension in Dark Dimension Theory

Scientists analyzing data from the Karlsruhe Tritium Neutrino Experiment (KATRIN) explore whether a heavy, right-handed neutrino could reside in a hidden micron-scale dimension as suggested by the Dark Dimension Proposal; by translating KATRIN beta-decay spectra into a test for extra dimensions, they identify two regions where a kink in the spectrum would reveal such a particle, potentially linking neutrino physics to dark matter, dark energy, and a changing cosmological constant and guiding future experiments.

via Yahoo|

#cosmological-constant #dark-dimension #katrin

science2 months ago•11 min saved

Neutrino laser concept aims to harness ghost particles

US researchers propose a 'neutrino laser'—a compact device that could emit coherent bursts of neutrinos by cooling radioactive atoms into a Bose-Einstein condensate and triggering synchronized decay via superradiance. If realized, it could transform neutrino research and enable new applications from underground communication to medical imaging, but the concept is still theoretical and faces significant technical hurdles.

via Interesting Engineering|

#bose-einstein-condensate #laser #neutrino

space5 months ago•85 min saved

Ghost-state neutrino from a black hole explosion could rewrite physics and dark matter

A 2023 ultra-energetic neutrino detected by KM3NeT may have originated from an exploding primordial black hole with a dark charge (a quasi-extremal PBH). If confirmed, such events could provide a complete catalog of subatomic particles and illuminate dark matter, but the idea is unproven and lacks corroborating detections. Researchers predict a first quasi-extremal PBH explosion could occur by 2035, highlighting a potential new window into particle physics and cosmology.

via Live Science|

#dark-charge #dark-matter #hawking-radiation

science5 months ago•3 min saved

Ultra‑Energy Neutrino Sparks Dark-Electron Black Hole Theory

A rare, ultrahigh-energy neutrino detected by KM3NeT in 2023 prompts a bold hypothesis: a quasi-extremal primordial black hole dumping dark electrons, triggering a rapid explosion that emits a narrow band of neutrinos; the idea, outlined in a Physical Review Letters preprint and set for formal publication, could explain why KM3NeT saw the event while IceCube did not, but it remains speculative pending more data and analysis.

via Gizmodo|

#dark-electrons #hawking-radiation #km3net

science5 months ago•5 min saved

Ultra-Powerful Neutrino Sparks Dark Matter Clue From Ancient Black Hole

A 220 PeV neutrino detected by KM3NeT's ARCA detector in February 2023 far exceeds energies from any accelerator and challenges existing models; a University of Massachusetts Amherst team suggests it came from a primordial black hole evaporating via Hawking radiation, offering a potential link to dark matter and a window into new physics beyond the Standard Model.

via The Daily Galaxy|

#astrophysics #dark-matter #km3net

space5 months ago•82 min saved

Ultra-energetic neutrino hints at exploding primordial black holes and dark matter link

A 2023 ultra-high-energy neutrino detected by KM3NeT is proposed to be debris from an exploding primordial black hole, potentially evidencing Hawking radiation and primordial black holes as dark matter candidates, though IceCube’s non-detection and a proposed dark-charge model for quasi-extremal black holes add complexity to the interpretation.

via Space|

#dark-matter #hawking-radiation #km3net

science5 months ago•7 min saved

Primordial Black Hole Bursts May Explain Ultra-Energetic Neutrinos

After a 2023 ultra-high-energy neutrino puzzled scientists, a UMass Amherst team proposes it originated from a primordial black hole explosion driven by Hawking radiation; their 'dark-charge' (quasi-extremal PBH) model could connect PBHs to dark matter and suggest these explosions may occur more often than thought, guiding future astrophysical searches.

via The Daily Galaxy|

#dark-charge #dark-matter #hawking-radiation

science6 months ago•2 min saved

Scientists Achieve First Observation of Neutrino Transmutation

Scientists at the SNO+ experiment have observed neutrino-induced transmutation of carbon-13 into nitrogen-13 for the first time, a rare event due to neutrinos' elusive nature, made possible by the large volume of liquid scintillator and the experiment's underground location.

via Hackaday|

#liquid-scintillator #neutrino #particle-physics

science7 months ago•42 min saved

MicroBooNE and KATRIN Find No Evidence for Light Sterile Neutrinos

The MicroBooNE experiment searched for light sterile neutrinos using two neutrino beams and found no evidence supporting their existence, thereby strongly constraining the parameter space that could explain previous anomalies observed in short-baseline neutrino experiments.

via Nature|

#microboone #neutrino #neutrino-oscillation

science8 months ago•6 min saved

Calorimetric Study Sets New Limit on Electron Neutrino Mass

The HOLMES experiment has set the most stringent upper limit on the electron neutrino mass at less than 27 eV/c² using a scalable calorimetric approach with microcalorimeters measuring holmium-163 decay, validating long-term experimental techniques and paving the way for future sub-eV sensitivity in neutrino mass measurements.

via Phys.org|

#calorimetric #electron-neutrino-mass #holmes

science8 months ago•4 min saved

Farthest Universe Particle Detected in Mediterranean Sea

Scientists using the KM3NeT underwater telescope in the Mediterranean Sea detected the most energetic cosmic neutrino ever recorded at 120 PeV, challenging existing theories and opening new avenues for understanding extreme astrophysical phenomena and cosmic particle acceleration.

via Evidence Network|

#cosmic-discovery #high-energy-particles #km3net

science11 months ago•4 min saved

Record-Breaking 'Ghost Particle' Hits Earth

Scientists detected a record-breaking 220 PeV neutrino using the KM3NeT detector deep in the Mediterranean Sea, marking the highest energy neutrino ever observed and opening new avenues in ultra-high-energy neutrino astronomy, though its exact origin remains uncertain.

via ScienceAlert|

#astronomy #cosmic-particle #km3net

science11 months ago•5 min saved

Study Finds Neutrino Masses Unlikely Linked to Dark Matter Interactions

A recent study comparing experimental neutrino data with theoretical models suggests that neutrino masses are unlikely to originate from interactions with dark matter, favoring more conventional particle physics explanations.

via Phys.org|

#dark-matter #dark-sector #neutrino