η-deuteron scattering

{η}-deuteron scattering lengths are calculated. A summation of the multiple scattering series is carried out and the result is checked against more involved calculations. The necessity to go beyond the fixed nucleon approximation is emphasized. It is shown that a quasibound or virtual state in the {η}-deuteron system may occur within the range of {η}-nucleon scattering lengths suggested by other experiments. {} 1996 The American Physical Society