The continuum structure of the Borromean halo nucleus 11Li

We solve the Faddeev equations for 11Li (n+n+9Li) using hyperspherical coordinates and analytical expressions for distances much larger than the effective ranges of the interactions. The lowest resonances are found at 0.65 MeV (12+,32+,52+) and 0.89 MeV (32±) with widths of about 0.35 MeV. A number of higher-lying broader resonances are also obtained. The dipole strength function and the Coulomb dissociation cross section are also calculated.