Eta-Helium Quasi-Bound States

N. Willis, Y. Le Bornec, A. Zghiche +11

The cross section and tensor analysing power t_20 of the d\vec{d}->eta 4He reaction have been measured at six c.m. momenta, 10 < p(eta) < 90 MeV/c. The threshold value of t_20 is c…