Eur. Phys. J. A (2004) 19: 153-156
https://doi.org/10.1140/epja/i2003-10136-9
https://doi.org/10.1140/epja/i2003-10136-9
Letter
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
* e-mail: leonid.glozman@uni-graz.at
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
