Furthermore, from the spin correlation between the outgoing hyperon and antihyperon, the sign of the phase can be extracted.
Schönning Karin, Li Cui 2017, 'Future Perspectives on Baryon Form Factor Measurements with BES III', EPJ Web of Conferenceshttps://doi.org/10.1051/epjconf/201713712002. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)