Effective-Range-Expansion Study of Near Threshold Heavy-Flavor Resonances

Guo, Zhi-Hui  (Department of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050024, China) ; Gao, Rui (Department of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050024, China) ; Kang, Xian-Wei (College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China) ; Oller, J. A. (Departamento de Física, Universidad de Murcia, E-30071 Murcia, Spain)

18 June 2019

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 Zc(3900) , X(4020) , χc1(4140) , ψ(4260) , and ψ(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.


Published in: Advances in High Energy Physics 2019 (2019) 4651908
Published by: Hindawi
DOI: 10.1155/2019/4651908
arXiv: 1812.07323
License: CC-BY-3.0



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