Abstract
The pion annihilation of antiproton-nucleon pairs in boundS-states (singlet and triplet) are analyzed taking into account conservation law and selection rules previously founded. With a statistical model for the valutation of transition matrix elements the ratio of three pion to two pion annihilation is calculated and, for the 3π annihilation, the angular distributions and energy spectrum of the final mesons. Finally some considerations are done about the annihilation of the pair from isotopic spin eigenstates.
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