Neutrino particle1/10/2024 The latter unambiguously identifies the incoming particle as an anti-neutrino rather than a neutrino, or anti-matter rather than matter. Furthermore, data collected by the sensors closest to the interaction point, as well as the measured energy, are consistent with the hadronic decay of a W − boson produced on the Glashow resonance as outlined in the 1960 prediction. Given its energy and direction, it is classified as an astrophysical neutrino at the 5σ level. Using San Diego Supercomputer Center’s (SDSC) Comet at UC San Diego, Bridges at Pittsburgh Supercomputing Center (PSC), and Frontera at Texas Advanced Computing Center (TACC), one interaction of one antineutrino (known as an “event”) was found with a visible energy of 6.05 ± 0.72 PeV. The multinational team of scientists-including researchers from UC Irvine and UC Berkeley-searched for very-high-energy astrophysical neutrinos with IceCube. The result recently published in Nature is so important because it shows that IceCube can detect anti-neutrinos as different from neutrinos, thus opening a new window to the universe. It also further demonstrated the ability of IceCube, which detects nearly massless particles called neutrinos using thousands of sensors embedded in the Antarctic ice, to do fundamental physics. With this detection, scientists provided another confirmation of the Standard Model of particle physics. IceCube had detected a Glashow resonance event, a phenomenon predicted by Nobel Laureate Physicist Sheldon Glashow in 1960. The interaction was captured by a massive telescope buried in the Antarctic glacier, the IceCube Neutrino Observatory (IceCube). Deep inside the ice sheet at the South Pole, it smashed into an electron and produced a particle, called W − boson, that quickly decayed into a shower of secondary particles. ![]() In December 2016, a high-energy particle called an electron antineutrino hurtled to Earth from outer space at close to the speed of light. This event was nicknamed “Hydrangea.” Credit: IceCube Collaboration. Each colored circle shows an IceCube sensor that was triggered by the event red circles indicate sensors triggered earlier in time, and green-blue circles indicate sensors triggered later. ![]() A visualization of the Glashow event recorded by the IceCube detector.
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