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Advances in High Energy Physics
Volume 2007, Article ID 52750, 14 pages
Research Article

Experiments Needed in Meson and Baryon Spectroscopy

Physics Department, Queen Mary, University of London, London E1 4NS, UK

Received 17 September 2007; Accepted 30 November 2007

Academic Editor: Peter J. Bussey

Copyright © 2007 D. V. Bugg. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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± and K± beams up to 3 GeV/c. Similar data are needed in the light meson sector for p¯p interactions in the momentum range 0.3–2 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, 3S1 and 3D1 mesons in the mass range 1–2.4 GeV could probably be separated either by diffractive dissociation of transversely polarised photons or by e+e radiative return experiments using transversely and longitudinally polarised electrons.