where the T matrix element contains a sum over all intermediate states that contribute to the process. Here the proton target and recoil are treated as a virtual beam of Reggeons in a virtual collider experiment. In terms of the individual decay matrix elements introduced earlier, the T matrix element can be written as
+
where the T matrix element contains a sum over all intermediate states that contribute to the process. In terms of the individual decay matrix elements introduced earlier, the T matrix element can be written as