Evidence that the a0(980) and f0(980) are not elementary particles

Details Evidence that the a0(980) and f0(980) are not elementary particles Evidence that the a0(980) and f0(980) are not elementary particles

2003-08-12

arxiv.org/abs/hep-ph/0308129v1

Phys.Lett.B586:53-61,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 4 Figures

Scientific paper

10.1016/j.physletb.2004.01.088

We study the interesting problem of whether it is possible to distinguish composite from elementary particles. In particular we generalize a model-independent approach of S. Weinberg to the case of unstable particles. This allows us to apply our formalism to the case of the a0(980) and f0(980) resonances and to address the question whether these particles are predominantly genuine, confined quark states (of $\bar q q$ or $qq\bar q\bar q$ structure) or governed by mesonic components.

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