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Decays of neutral pseudoscalar mesons into lepton pairs

Description: The authors calculate the branching ratio {Lambda}(P {yields} {ell}{sup +}{ell}{sup -})/{Lambda}(P {yields} {gamma}{gamma}) to lowest contributing order in quantum electrodynamics, with a vector meson model for the pseudoscalar meson form factor. They treat the processes {eta} {yields} {mu}{sup +}{mu}{sup -}; {eta} {yields} e{sup +}e{sup -}; K{sub 2}{sup 0} {yields} {mu}{sup +}{mu}{sup -}; K{sub 2}{sup 0} {yields} e{sup +}e{sup -}; {pi}{sup 0} {yields} e{sup +}e{sup -}. Results are compared with those of previous calculations.
Date: September 24, 1968
Creator: Quigg, C. & Jackson, J. D.
Partner: UNT Libraries Government Documents Department

THE PARITY OF THE NEUTRAL PION AND THE DECAY pi{sup 0} Yields 2e{sup +} + 2e{sup -}

Description: Two hundred and six electronic decays of the pi{sup 0}, pi{sup 0} yields e{sup +} + e{sup -} + e{sup +} + e{sup -}, were observed in a hydrogen bubble chamber. The decay distributions of the electron pairs and the total rate for this process are shown to be in good agreement with theory. An examination of correlations of the e{sup +}e{sup -} pair decay planes on the basis of electrodynamic predictions is in agreement with the hypothesis that the pi{sup 0} is pseudoscalar, but disagrees for scalar pions by 3.6 standard deviations. (auth)
Date: January 1, 1962
Creator: Samios, N.P.; Plano, R.; Prodell, A.; Schwartz, M. & Steinberger, J.
Partner: UNT Libraries Government Documents Department