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Nuclear-emulsion observations identified the pion and its decay to the muon, establishing the light meson associated with the long-range nuclear interaction.
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Emulsion tracks distinguished the pion and its decay to a muon.
The source theory, law, entity, prediction, or structural claim is directly tested, supported, constrained, or established by the target experiment or observation. Experimental support is not final logical proof; the edge detail states exactly what was measured.
wp-physics-pionnobel-pionpdg-rppEach relation below starts at this concept.
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