= Arthur B. McDonald
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{tag=Physicist}
{wiki}
= Arthur McDonald
{c}
{synonym}
= A. B. McDonald
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{synonym}
<Arthur B. McDonald> led work at the <Sudbury Neutrino Observatory>, which distinguished a change of <neutrino flavor> from a low total solar <neutrino> flux. Reactions on <deuterium> provided different flavor sensitivities: the charged-current channel selected <electron neutrinos>, while the neutral-current channel measured all active <neutrino flavors>. Their comparison revealed a non-electron component while the total flux agreed with solar expectations. The detector thereby tested the <solar neutrino problem> without requiring all missing electron-flavor events to mean missing solar production.<Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in the Sudbury Neutrino Observatory by Q. R. Ahmad and others>[2002 abstract: charged-current, neutral-current and elastic-scattering flux comparison]{ref}
A <physicist> working in experimental particle <astrophysics>.<Arthur McDonald by Queen’s University>[Independent professional identity]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Arthur%20McDonald%200099.jpg?width=250]
{title=Portrait of <Arthur B. McDonald>}
{description=Holger Motzkau, 2015, Wikipedia/Wikimedia Commons; photograph at the Royal Swedish Academy of Sciences press conference, 7 December 2015. https://creativecommons.org/licenses/by-sa/3.0/[Creative Commons Attribution-Share Alike 3.0 Unported.], via Wikimedia Commons.}
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