GLUONIC-BOUND-STATE MODEL AND X(2.8)

Gluonic states are discussed using a bound-state equation. We estimate masses and decay widths and point out the absence of a low-mass 0+ state. Therefore, the easiest way to observe these states is through the γγ decay mode of the 0- particle, whose mass is about 2.8 GeV in our approximation. One candidate for the 0- gluonic state is X(2.8), which was observed in a radiative decay of ψ(J). © 1979 The American Physical Society.