Why the high-lying glueball does not mix with the neighbouring f 0
Institute for Theoretical Physics, University of Graz, Universitätsplatz 5, A-8010, Graz, Austria
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Chiral symmetry restoration in high-lying hadron spectra implies that hadrons which belong to different irreducible representations of the parity-chiral group cannot mix. This explains why the , which was suggested to be a glueball, and hence must belong to the scalar (0,0) representation of the chiral group, cannot mix with the neighbouring , which was interpreted as a state, and that belongs to the (1/2,1/2) representation of the chiral group. If confirmed, then we have an access to a “true” glueball of QCD.
© Società Italiana di Fisica and Springer-Verlag, 2004