Nicola Cabibbo
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High Quality Content by WIKIPEDIA articles! Cabibbo's major work on the weak interaction originated from a need to explain two observed phenomena: The transitions between up and down quarks, between electrons and electron neutrinos, and between muons and muon neutrinos had similar likelihood of occurring; and The transitions with change in strangeness had amplitudes equal to one fourth of those with no change in strangeness. Cabibbo solved the first issue by postulating weak universality, which involves a similarity in the weak interaction coupling strength between different generations of…mehr

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High Quality Content by WIKIPEDIA articles! Cabibbo's major work on the weak interaction originated from a need to explain two observed phenomena: The transitions between up and down quarks, between electrons and electron neutrinos, and between muons and muon neutrinos had similar likelihood of occurring; and The transitions with change in strangeness had amplitudes equal to one fourth of those with no change in strangeness. Cabibbo solved the first issue by postulating weak universality, which involves a similarity in the weak interaction coupling strength between different generations of particles. He solved the second issue with a mixing angle C (now called the Cabibbo angle), between the down and strange quarks. Modern measurements show that C = 13.04°.