Summary
The mean life-time of the π0- is measured by the method of Harris, Orear and Taylor. The decay distance of π0-produced by Kπ2-decay at rest (K+→π++π0) and subsequent decay by the Dalitz mode (π0→e++e−+γ) is measured. Using Ilford G-5 emulsions, exposed in the 300 MeV/c separated K+ beam from the Bevatron at Berkeley, 88 of the above events were found. The observed mean π0 life-time is (2.8±0.9)·10−16) s.
Riassunto
Si misura col metodo di Harris, Orear e Taylor la vita media del mesone π0, e la distanza di decadimento del mesone π0 prodotto nel decadimento Kπ2 in quiete (K+→π++π0) e del susseguente decadimento nel modo di Dalitz (π0→e++e−+γ). Servendosi di emulsioni Ilford G-5, esposte al fascio separato di K+ di 300 MeV/c, si sono trovati 88 eventi del tipo suddetto. La vita media osservata del π0 è (2.8±0.9)·10−16) s.
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References
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Supported in part by grants from the National Science Foundation and the American Academy of Arts and Sciences, and by an equipment loan contract with the Office of Naval Research.
Traduzione a cura della Redazione.
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Koller, E.L., Taylor, S. & Huetter, T. Mean life-time of the neutral pion. Nuovo Cim 27, 1405–1409 (1963). https://doi.org/10.1007/BF02785635
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DOI: https://doi.org/10.1007/BF02785635