Branching ratios of p̄p annihilation reactions Original Research Article

The annihilation fractions of the View the MathML source annihilation at rest into ππ, πη, ηη, φπ0, View the MathML source and η(1440)ππ at different target densities are reviewed in order to determine their branching ratios from S and P antiprotonic atom sublevels and the sublevel population fractions. Particular emphasis is given to the incompatibility of some annihilation fraction measurements and to the expected dependence of the View the MathML source atom sublevel population fractions on the target density. The population fraction of the 3P0 sublevel in liquid target turns out to be higher than its statistical weight.