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| Home > Publications database > Baryon excitations : lectures of the COSY Workshop held at the Forschungszentrum Jülich from 2 to 3 May 2000 |
| Home > Publications database > Baryon excitations : lectures of the COSY Workshop held at the Forschungszentrum Jülich from 2 to 3 May 2000 |
| Book | PreJuSER-29014 |
;
2000
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
Jülich
ISBN: 3-89336-273-8
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Abstract: The COSY workshop on Baryon Excitations was held at Jiilich on 2-3 May 2000. Approximately 45 physicists attended, representing the international theoretical and experimental baryon physics community. There were 20 invited talks, of which eight were theoretical. These talks reviewed current models of baryon structure and strong decays, electromagnetic couplings and hadron reaction dynamics. The experimental contributions summarized the status of baryon research at the major facilities in Europe (Bonn, Mainz, Saturne and Jiilich) and the USA (Jefferson Lab). The purpose of this workshop was to review the status of light baryon spectroscopy, and especially to identify outstanding issues in baryon physics, which COSY can most usefully address. There was wide agreement that the meeting was informative with lively discussions of the physics issues, and stimulating for promoting collaborations between the physicists in attendance. Although there is much new research activity in baryon physics using electromagnetic probes, it was noted that COSY fills a special, complementary role as a facility actively pursuing research on baryons using hadronic probes. The use of hadrons implies that excited baryons are produced at large rates compared to electromagnetic facilities. With the planned upgrade of TETHYS and TOF particle detector systems, COSY will be especially competitive in the study of N* decays. Another important point is the high selectivity of certain hadronic reactions in the N* excitation, e.g. p-c scattering in which scalar excitations (without transfer of spin and isospin) are dominant, which gives access to purely radial and orbital N* excitations. Topics identified at the meeting as being of high priority were: establishing a resonably complete N* spectrum; resolving outstanding controversies regarding the nature of the Roper resonance, the lightest excited nucleon; integration of the results of individual experiments at COSY into a world baryon data base for simultaneous analysis; establishing the nature of the short-distance force between light quark systems using baryon data; testing the widely assumed model for hadron strong decays; and searches for a new form of strongly interacting matter predicted to be composed of both quark and gluon excitations. It is anticipated that future experiments at COSY will have a strong impact on research in these areas.
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