The decay of this particle into a pion and a neutrino-antineutrino pair provides a chance tomeasure rho and eta, two paramete
The decay of this particle into a pion and a neutrino-antineutrino pair provides a chance tomeasure rho and eta, two parameters in the Wolfenstein parametrization of the CKM matrix. Dalitzfirst applied his namesake technique to the decay of these particles. In 1999, Fermilab's KTeV teamfound that the value for a double ratio of different modes of decay of these particles and theirantiparticles was 28 plus or minus 4.1 all times 10 to the minus 4. That double ratio is epsilon primeover epsilon. Providing evidence that the (*) long-lived neutral type of this particle decayed into twopions won Cronin and Fitch a Nobel Prize. For 10 points, name this particle in which CP violation wasdiscovered and which was the cause of the tau-theta puzzle.
The decay of this particle into a pion and a neutrino-antineutrino pair provides a chance tomeasure rho and eta, two parameters in the Wolfenstein parametrization of the CKM matrix.
kaons [or K-mesons; accept K-sub-L before end of power]