= Takaaki Kajita
{c}
{tag=Physicist}
{wiki}
= T. Kajita
{c}
{synonym}
<Takaaki Kajita> contributed to the Super-Kamiokande observation of atmospheric <neutrino oscillations>. <Muon neutrinos> arriving from below had crossed a much longer path through the <Earth> than those produced overhead. The direction-dependent deficit therefore tested propagation, while comparisons with electron-like events helped constrain possible production or detector explanations. The 1998 report found the pattern consistent with conversion between <muon neutrinos> and <tau neutrinos>.<Evidence for oscillation of atmospheric neutrinos by Y. Fukuda and others>[1998 abstract and zenith-angle analysis; oscillation interpretation and checks on flux/detector uncertainties]{ref}
A <physicist> researching atmospheric <neutrinos> and <neutrino oscillations>.<ICRR’s Takaaki Kajita to share Breakthrough Prize in Fundamental Physics by Institute for Cosmic Ray Research, University of Tokyo>[Independent professional identity]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Takaaki_Kajita_0195.jpg?width=260]
{title=Portrait of <Takaaki Kajita>}
{description=Holger Motzkau. https://creativecommons.org/licenses/by-sa/3.0/[CC BY-SA 3.0], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Takaaki_Kajita_0195.jpg}
{width=260}
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