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

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arxiv hep-ph/0308129 v1 pith:YDPVIXN6 submitted 2003-08-12 hep-ph

V. Baru , J. Haidenbauer , C. Hanhart , Yu. Kalashnikova , A. Kudryavtsev This is my paper · ORCID
classification hep-ph
keywords particlescaseelementarywhetheraddressallowsapplyapproach
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abstract

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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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Predicted Exotic Doubly Heavy-Strange Pentaquarks

    hep-ph 2026-05 unverdicted novelty 6.0 of 10

    Predictions of two states in u d-bar s cc, three in u d-bar s cb, and four in u d-bar s bb sectors plus virtual states, obtained via unitary coupled channels with off-diagonal binding dominance.

  2. Finite-volume analysis of the $H$-dibaryon including left-hand-cut effects

    hep-lat 2026-05 unverdicted novelty 6.0 of 10

    Finite-volume N/D analysis with left-hand cuts applied to lattice data shows a mild but statistically significant effect on H-dibaryon binding energy compared to Lüscher quantization.

  3. Isospin-breaking effects on the threshold cusp structures in $\Lambda N$-$\Sigma N$ scattering

    hep-ph 2026-05 unverdicted novelty 5.0 of 10

    Isospin breaking splits threshold cusps in ΛN-ΣN scattering into constrained structures whose relative sharpness or type can change, as shown via K-matrix classification and N²LO chiral EFT calculations.

  4. A variation on "compositeness" (including higher partial waves)

    nucl-th 2025-02 accept novelty 5.0 of 10

    For finite-range potentials, the compositeness of a bound state is exactly proportional to the probability of finding the particle outside a chosen radius, with a universal factor depending on angular momentum.

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