η-Decays, PCAC, and quarks
作者： E Llanta , R Tarrach
DOI: 10.1016/0003-4916(82)90275-5
关键词: Physics 、 Meson 、 Quantum chromodynamics 、 Pion 、 Quark 、 Particle decay 、 Particle physics 、 Branching fraction 、 Quark model 、 Elementary particle
摘要: Abstract The η → γγ, π+π−γ, π0γγ, and 3π decays are studied in a coloured quark field theory at an effective one loop level. soft PCAC approximation is improved by including mass corrections. first decay used as constraint on the free parameters. second well explained, both its width photonic spectrum. In third case our prediction better than that of other models but improvement data necessary to decide issue. For process model gives good description spectrum relative widths, difficulties arise with absolute widths. Mass corrections seem simulate exactly p-meson contribution.
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