Latest Results from K2K
Takanobu Ishii (IPNS, KEK)
TL;DR
The K2K experiment has demonstrated the feasibility of long-baseline neutrino oscillation studies, observing a muon neutrino deficit after 100 days of data collection, confirming neutrino oscillation phenomena.
Contribution
First long-baseline neutrino experiment to establish the method and observe neutrino oscillation effects over 250 km.
Findings
Observed a muon neutrino deficit at 90% significance after 100 days
Confirmed the method for long-baseline neutrino experiments
Provided initial evidence supporting neutrino oscillation
Abstract
The KEK-to-Kamioka long-baseline neutrino experiment (K2K) has begun its investigation of neutrino oscillation, and has established the method of a long-baseline neutrino experiment. From the first 100 days of data-taking, a deficit of muon neutrino in the 1-GeV energy region after 250-km flight was observed at the 90% significance level.
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Taxonomy
TopicsNeutrino Physics Research · Particle physics theoretical and experimental studies · Astrophysics and Cosmic Phenomena