Experiments needed in Meson and Baryon Spectroscopy

Three (or four) straightforward experiments would contribute greatly to completing the spectroscopy of baryons and light mesons. In the baryon sector, data are needed on inelastic reactions from a polarised target with π andK beams up to ∼ 3 GeV/c. Similar data are needed in the light meson sector for p̄p interactions in the momentum range 0.3 to 2 GeV/c. In both cases, valuable information is to be obtained from longitudinal (L) and sideways (S) target polarisations as well as the conventional normal (N) polarisation. Thirdly, S1 and D1 mesons in the mass range 1 to 2.4 GeV/c could probably be separated either by diffractive dissociation of transversely polarised photons or by ee radiative return experiments using transversely and longitudinally polarised electrons. PACS numbers: 13.25.-k, 13.25.Gv, 13.75.Lb