We present ongoing work on the JP=1/2^- hyperons from meson–baryon scattering in lattice QCD. The (1405) is studied on CLS ensembles with 2+1 flavours and m_=285 MeV, mK=460 MeV, extending an earlier work where two poles were identified. Single- and two-hadron operators are considered at rest and in moving frames. Preliminary results are also shown for the (1/2^-) channel, including three open scattering thresholds. The importance of extended operators in the determination of the baryon spectrum is discussed as well.
Alvarado et al. (Thu,) studied this question.