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Effective-range-expansion study of near threshold heavy-flavor resonances

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arxiv 1812.07323 v2 pith:AZTPONUC submitted 2018-12-18 hep-ph

Rui Gao , Zhi-Hui Guo , Xian-Wei Kang , J.A.Oller This is my paper · ORCID
classification hep-ph
keywords resonanceseffective-range-expansionheavy-flavornearscatteringaccountaforementionedamplitudes
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abstract

In this work we study the resonances near the thresholds of the open heavy-flavor hadrons using the effective-range-expansion method. The unitarity, analyticity and compositeness coefficient are also taken into account in our theoretical formalism. We consider the $Z_c(3900)$, $X(4020)$, $\chi_{c1}(4140)$, $\psi(4260)$ and $\psi(4660)$. The scattering lengths and effective ranges from the relevant elastic $S$-wave scattering amplitudes are determined. Tentative discussions on the inner structures of the aforementioned resonances are given.

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Cited by 2 Pith papers

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

  1. Composite nature of the $T_{cc}$ state

    hep-ph 2024-12 conditional novelty 4.0 of 10

    A CDD-pole fit to the LHCb Tcc line shape yields a compositeness of 0.23, suggesting the Tcc is mostly compact tetraquark rather than a D*D molecule.

  2. Composite nature of exotic states from data analysis

    hep-ph 2025-09 conditional novelty 2.0 of 10

    Compositeness values for X(3872), Zb(10610), Zb(10650), and Tcc are extracted from CDD-pole fits to published spectra; X(3872) is unconstrained (0 to 1), Tcc is found at 0.23 with large errors.

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