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A formalism for total set of spin observables of the reaction pd  → 3Heη derived in a model independent way is  presented and a possibility to perform a complete polarization experiment is  investigated. Separation of s- and p-wave amplitudes of this reaction in the  threshold region allows one to determine a position of the quasibound pole in  the 3He − η system. It is shown that in order to get  such a separation one should measure spin-transfer coecients in addition to  analyzing powers and spin-correlations. Specic observables, given by products  of one s- and one p-wave amplitudes, are found. Measurement of these observables  will provide new independent information on the 3He −  η pole position and this allows one to determine whether  the 3He − η state is quasi-bound or anti-bound

Quasi-Bound3He −ηState and Spin-Observables of the Reactionpd→3Heη

Quasi-Bound³He −ηState and Spin-Observables of the Reactionpd→³Heη