First measurements of the branching fractions for the decay modes Ξc0→Λη and Ξc0→Λη′ and search for the decay Ξc0→Λπ0 using Belle and Belle II data
Belle 和 Belle II 实验利用大量数据首次测量了 Ξc0→Λη 和 Ξc0→Λη′ 的分支比并观测到前者,同时为 Ξc0→Λπ0 衰变设定了上限,从而深化了对单 Cabibbo 压低衰变机制的理解。
Belle, Belle II Collaborations, :, M. Abumusabh, I. Adachi, L. Aggarwal, H. Ahmed, Y. Ahn, H. Aihara, N. Akopov, S. Alghamdi, M. Alhakami, A. Aloisio, N. Althubiti, K. Amos, N. Anh Ky, C. Antonioli, D (…)2026-02-26⚛️ hep-ex