H. Isozaki, ASYMPTOTIC PROPERTIES OF GENERALIZED EIGENFUNCTIONS FOR 3 BODY SCHRODINGER-OPERATORS, Communications in Mathematical Physics, 153(1), 1993, pp. 1-21
We study the spatial asymptotics of generalized eigenfunctions of thre
e body Schrodinger operators and derive all the S-matrices with initia
l state of 2 clusters.