Venugopal, EPHolstein, BR2024-04-262024-04-261998https://hdl.handle.net/20.500.14394/40919This is the pre-published version which is collected from arXiv. The published version is at http://prd.aps.org/abstract/PRD/v57/i7/p4397_1We determine the η-η′ mixing angle via a procedure relatively independent of theoretical assumptions by simultaneously fitting η,η′ reactions involving the anomaly η,η′→γγ, π+π-γ. We extract reasonably precise renormalized values of the octet and singlet pseudoscalar decay constants F8, F0, as well as the mixing angle θ.Physicsarticle