All articles tagged with #neutrino oscillations
New simulations with detailed momentum-space neutrino transport show fast flavor conversions can both promote and hinder supernova explosions, making low-mass stars explode more readily while heavier stars become less likely; the study highlights the need for Boltzmann-like transport to accurately capture flavor dynamics and warns simpler models can misidentify where flavor conversions occur.
Decades of hints for a light sterile neutrino have collapsed after recent null results (KATRIN and MicroBooNE, plus reactor and gallium studies), effectively ruling out the simplest sterile-neutrino explanation for several anomalies. While the LSND/Miniboone/gallium puzzles remain unexplained, physicists are pursuing more complex neutrino scenarios and await data from JUNO, DUNE, and Isodar to map neutrino masses and oscillations.
Neutrinos, the most mysterious particles in the universe, have been pivotal in uncovering fundamental physics, from their initial proposal in 1930 to their confirmed mass and oscillation between flavors, which could hold answers to major cosmic mysteries like dark matter, dark energy, and matter-antimatter asymmetry. Ongoing experiments aim to measure their properties more precisely, potentially revealing new physics beyond the Standard Model.
Recent experiments, particularly KATRIN, have set the tightest constraints yet on the mass of the electron neutrino, showing it can be no more than 0.45 eV/c², which has significant implications for understanding the universe's composition and the role of neutrinos in cosmic evolution. Despite these constraints, the exact mass of neutrinos remains unknown, and further research is needed to fully understand their properties and impact on cosmology.