Theory Deep Dives — Part 4: The MSW effect — matter-induced oscillation
Why neutrino oscillation works differently in dense matter than in vacuum — the Mikheyev-Smirnov-Wolfenstein effect that resolves the solar neutrino problem.
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The MSW effect: how matter inside the Sun bends neutrino flavor
Neutrino oscillation in vacuum is one thing. Neutrino oscillation inside a star is something else. The Mikheyev-Smirnov-Wolfenstein effect explains why most solar electron neutrinos arrive at Earth in a different flavor — and why the answer depends on energy.