Summary
Decay branching ratios of the η0-meson into 2γ, 3π0, π0γγ, π+π−π0, π+π−γ are presented. Neutral and charged modes are detected in the same apparatus. Eta triggers are indipendent of the decay mode, being obtained from the neutron time of flight. The distribution of eta decays among the various possible branches is derived from multiplicities of charged particles and gamma-rays observed in a double spark-chamber array.
Riassunto
Si presentano i rapporti di decadimento del mesone η0 nei canali 2γ, 3π0, π0γγ, π+π−π0 e π+π−γ determinati in maniera diretta mediante un doppio sistema di camere a scintilla ad alto Z. Gli eventi sono stati selezionati dalla cinematica del neutrone di rinculo. La ripartizione degli eventi tra i vari canali è stata basata sull’analisi delle molteplicità di rami carichi e di sciami elettronici rivelati.
Реэюме
Приводятся отнощения ветвей распада η0-меэона на 2γ, 3π0, π0γγ, π+π−π0, π+π−γ. Нейтральные и эаряженные моды детектируются с помошью одинаковой аппаратуры. Эта-триггеры не эависят от моды распада, причем, определяются иэ времени пролета нейтрона. Распределение распадов η-меэона между раэличными воэможными ветвями выводится иэ множественности эаряженных частиц и гамма-лучей, наблюденных в цепочке двойных искровых камер.
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To speed up publication, the authors of this paper have agreed to not receive the proofs for correction.
Part of this work has been carried out at Brookhaven National Laboratory, Upton, L. I., N. Y.
Work supported in part through funds provided by the U.S. Atomic Energy Commission.
Work supported in part through funds provided by the Consiglio Nazionale delle Ricerche under the Italia-USA Scientific Co-operation Program.
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Kendall, B.N., Lanou, R.E., Massimo, J.T. et al. Direct determination of eta-zero branching ratios. Nuov Cim A 21, 387–412 (1974). https://doi.org/10.1007/BF02724813
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DOI: https://doi.org/10.1007/BF02724813