The separation of the annihilation final states in p.bar.p reactions at 4.6 and 9.1 GeV/c

The techniques used to attempt a separation of ambiguous annihilation and inelastic events at p momenta of 4.6 and 9.1 GeV/c are described. The problem is two-stage: Firstly the charged particle ambiguities are separated, then some estimate of the contribution of neutral inelastic processes (i.e. L( pi /sup +/ pi /sup -/)nnm pi /sup 0/; L, m =1,2,3...) must be made. It should be understood that in the latter case no genuine separation is possible, i.e. whilst one can speak about the fraction of events corresponding to pp to L( pi /sup +/ pi /sup -/)m pi /sup 0/ or pp to nnL( pi /sup +/ pi /sup -/)m pi /sup 0/, no separation can be made for individual events. (2 refs).