First measurement of the total width of the η′ (958) meson |
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| Authors: | DM Binnie J Carr NC Debenham WG Jones H Karami J Keyne NH Sarma |
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| Institution: | The Blackett Laboratory, Imperial College, London, England |
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| Abstract: | In a high-resolution missing mass experiment the total width of the η′ (958) meson has been measured to be 0.28 ± 0.10 MeV. Using the known γγ branching ratio the value Γ(η′ → γγ) = 5.4 ± 2.1 keV is deduced. This is in good agreement with calculations based on fractional charge quarks and a pseudo-scalar mixing angle of 11°. |
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