Phase ambiguity of the threshold amplitude in pp -> ppπ^0

Abstract

Measurements of spin observables in pp -> {\vec p}{\vec p}π^0 are suggested to remove the phase ambiguity of the threshold amplitude. The suggested measurements complement the IUCF data on {\vec p}{\vec p} -> ppπ^0 to completely determine all the twelve partial wave amplitudes, taken into consideration by Mayer et.al. [15] and Deepak, Haidenbauer and Hanhart [20].

4 pages, 1 table.