Scalar mesons and the phenomenology of the trace of the energy momentum tensor

@inproceedings{Narison1991ScalarMA,
  title={Scalar mesons and the phenomenology of the trace of the energy momentum tensor},
  author={St{\'e}phan Narison},
  year={1991}
}
Properties of the scalar gluonia and quarkonia derived from QCD spectral sum rules (QSSR) and some low-energy theorems related to the trace of the energy momentum tensor are summarized. The large width σ(0.9) and the narrow f0 (0.98) can be orthogonal eigenstates of the qq-gluonium mixing matrix with a mixing angle of about −45°. The G(1.6) seen at GAMS appears to be an almost pure gluonium state. The I = 1 a0 (0.98) is still compatible with a qq assigneent. We also discuss the effects of these… CONTINUE READING