【PRESS RELEASE】T2K Results Restrict Possible Values of Neutrino CP Phase - Published in Nature, the results are a major step forward in the study of difference between matter and antimatter -

The T2K Collaboration has published new results showing the strongest constraint yet on the parameter that governs the breaking of the symmetry between matter and antimatter in neutrino oscillations. Using beams of muon neutrinos and muon antineutrinos, T2K has studied how these particles and antiparticles transition into electron neutrinos and electron antineutrinos, respectively. The parameter governing the matter/antimatter symmetry breaking in neutrino oscillation, called δcp phase, can take

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【PRESS RELEASE】Researchers find way to show how the tiniest particles in our Universe saved us from complete annihilation

Recently discovered ripples of spacetime called gravitational waves could contain evidence to prove the theory that life survived the Big Bang because of a phase transition that allowed neutrino particles to reshuffle matter and anti-matter, explains a new study by an international team of researchers. Here is the press release. Link 2020.2.4KEK Researchers find way to show how the tiniest particles in our Universe saved us from complete annihilation 2020.2.4IPMU

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【PRESS RELEASE】Kick-off of the Belle II Phase 3 Physics Run

On March 25 19:44 (JST), 2019, electron-positron collisions have restarted at the SuperKEKB collider, and the Belle II experiment has now kicked off its physics data taking. Belle II is now fully instrumented with a state-of-the-art vertex detector, just in time for the start of the cherry blossom season in Japan. Read more Link 2019.3.25KEK Kick-off of the Belle II Phase 3 Physics Run Related Link Past Press Release 2019.3.11KEKSuperKEKB

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【PRESS RELEASE】KOTO Experiment at J-PARC Hadron Experimental Facility Broke World’s Best Sensitivity on Rare Neutral Kaon Decay by an Order of Magnitude - first step forward elucidation of “matter-antimatter asymmetry” -

An international collaboration reported the first major results from the experiment KOTO, which is being conducted at the Hadron Experimental Facility of Japan Proton Accelerator Research Complex (J-PARC). The KOTO collaboration set the upper limit of once in three hundred million on the rate of the neutral K-meson (kaon)#1 decay#2,3 into a neutral pi meson and a pair of neutrinos from the analysis of the data set collected in 2015,

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