The Glueball Candidate Η(1440) as Η Radial Excitation

The Particle Data Group decided to split the η(1440) into two states, called ηL and ηH . The η(1295) and the ηH are supposed to be the radial excitations of the η and η, respectively. The ηL state cannot be accomodated in a quark model; it cannot be a qq̄ state, however, it might be a glueball. In this contribution it is shown that that the η(1295) does not have the properties which must be expected for a radially excited state. The splitting of the η(1440) is traced to a node in the wave function of a radial excitation. Hence the two peaks, ηL and ηH , originate from one resonance which is interpreted here as first radial excitation of the η. Contributed to 32nd International Conference on High Energy Physics August 16 – 22, 2004 Beijing, China