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Albaladejo, M., Bibrzycki, L., Dawid, S. M., Fernandez-Ramirez, C., Gonzalez-Solis, S., Hiller Blin, A. N., et al. (2022). Novel approaches in hadron spectroscopy. Prog. Part. Nucl. Phys., 127, 103981–75pp.
Abstract: The last two decades have witnessed the discovery of a myriad of new and unexpected hadrons. The future holds more surprises for us, thanks to new-generation experiments. Understanding the signals and determining the properties of the states requires a parallel theoretical effort. To make full use of available and forthcoming data, a careful amplitude modeling is required, together with a sound treatment of the statistical uncertainties, and a systematic survey of the model dependencies. We review the contributions made by the Joint Physics Analysis Center to the field of hadron spectroscopy.
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Dai, L. R., Lyu, W. T., & Oset, E. (2026). Study of the J/ψ → Λ(Σ)over-bar0 ηreaction. Chin. Phys. C, 50(11), 113106–8pp.
Abstract: We study the isospin-violating J/psi -> Lambda(Sigma) over bar (0)eta reaction, recently measured by the BESIII collaboration, by considering the dominant terms involving (Sigma) over bar (0) and pairs of pseudoscalar-baryon particles that together form an SU(3) singlet and can therefore couple to the . We then allow these pairs to undergo final-state interaction to produce J/psi the final . We find that the relevant original channels are and , and that the incomplete cancellation of KN and K Xi and terms involving charged and neutral particles, owing to their different masses, is responsible for the reaction. With this mechanism, we find good agreement with the three experimental mass distributions.
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