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- W1977456220 abstract "An estimate of the mean lifetime of the ${ensuremath{pi}}^{0}$ meson has been obtained from an experiment employing a direct time-of-flight technique first attempted by Harris et al. in 1957. This method is based upon the observation in nuclear emulsion of the decay of the ${{K}_{ensuremath{pi}2}}^{+}$ meson (${K}^{+}ensuremath{rightarrow}{ensuremath{pi}}^{+}+{ensuremath{pi}}^{0}$) and the subsequent decay of the ${ensuremath{pi}}^{0}$ via the Dalitz mode, ${ensuremath{pi}}^{0}ensuremath{rightarrow}{e}^{+}+{e}^{ensuremath{-}}+ensuremath{gamma}$. In the present experiment we were able to utilize a new fine-grained emulsion (Ilford L.4) that yielded markedly improved resolution. The availability of the separated ${K}^{+}$ beam from the Bevatron at Berkeley permitted detection and measurement of 76 Dalitz decays. We obtain, for the mean lifetime of the ${ensuremath{pi}}^{0}$, $ensuremath{tau}=(1.9ifmmodepmelsetextpmfi{}0.5)ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}16}$ sec." @default.
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- W1977456220 date "1961-08-01" @default.
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- W1977456220 title "Mean Lifetime of the Neutral Pion" @default.
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- W1977456220 doi "https://doi.org/10.1103/physrev.123.1014" @default.
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