In a lattice QCD calculation with two light dynamical Chirally Improved (CI)
quarks we determine ground state and some excited state masses in all four
Lambda baryon channels 1/2^\pm and 3/2^\pm. We perform an infinite volume
extrapolation and confirm the widely discussed Lambda(1405). We also analyze
the amount of octet-singlet mixing, which is helpful in comparing states with
the quark model.Comment: 6 pages, 6 figures, accepted for publication in PR
