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First extraction of the - scattering length from near-threshold photoproduction on helium-4

Chengdong Han, Wei Kou, Rong Wang and Xurong Chen

Eur. Phys. J. C, 85 10 (2025) 1148

DOI: https://doi.org/10.1140/epjc/s10052-025-14877-5

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