Remarks on the branching ratios of antinucleon–nucleon annihilations into two mesons Original Research Article

The experimental values of the annihilation frequencies of View the MathML source annihilations at rest into π+π−, π0π0, π0η, ηη, φπ0, η(440)π+π−, K+K−, KSKL, KSKS are analysed. A contribution to disentangle the ambiguity among different π0π0,π0η,ηη values is given. Considering also View the MathML source and View the MathML source annihilation data, the isospin amplitudes of the ππ and KK reactions in the 3S1, 3P0 and 3P2 levels are deduced both in a conventional approach and considering the View the MathML source initial state interaction.