We report the first observation of the radiative decay Ds0∗(2317)+→ Ds∗+γ with a statistical significance exceeding 10 standard deviations. The signal is observed in the continuum e+e-→cc¯ process, using combined data samples of 980.4 fb-1 from Belle and 427.9 fb-1 from Belle II, collected at the KEKB and SuperKEKB asymmetric-energy e+e- colliders, respectively. The branching fraction ratio B[Ds0∗(2317)+→Ds∗+γ]/B[Ds0∗(2317)+→Ds+π0] is measured to be [7.13±0.70(stat)±0.26(syst)]%. This result provides crucial discrimination between theoretical models of the Ds0∗(2317)+ structure.

Abumusabh, M., Adachi, I., Aggarwal, L., Ahmed, H., Ahn, Y., Aihara, H., et al. (2026). Observation of the Radiative Decay Ds0∗ (2317)+ → Ds∗+ γ. PHYSICAL REVIEW LETTERS, 136(24), 1-9 [10.1103/vcld-225s].

Observation of the Radiative Decay Ds0∗ (2317)+ → Ds∗+ γ

Di Canto A.;
2026

Abstract

We report the first observation of the radiative decay Ds0∗(2317)+→ Ds∗+γ with a statistical significance exceeding 10 standard deviations. The signal is observed in the continuum e+e-→cc¯ process, using combined data samples of 980.4 fb-1 from Belle and 427.9 fb-1 from Belle II, collected at the KEKB and SuperKEKB asymmetric-energy e+e- colliders, respectively. The branching fraction ratio B[Ds0∗(2317)+→Ds∗+γ]/B[Ds0∗(2317)+→Ds+π0] is measured to be [7.13±0.70(stat)±0.26(syst)]%. This result provides crucial discrimination between theoretical models of the Ds0∗(2317)+ structure.
2026
Abumusabh, M., Adachi, I., Aggarwal, L., Ahmed, H., Ahn, Y., Aihara, H., et al. (2026). Observation of the Radiative Decay Ds0∗ (2317)+ → Ds∗+ γ. PHYSICAL REVIEW LETTERS, 136(24), 1-9 [10.1103/vcld-225s].
Abumusabh, M.; Adachi, I.; Aggarwal, L.; Ahmed, H.; Ahn, Y.; Aihara, H.; Akopov, N.; Alghamdi, S.; Alhakami, M.; Aloisio, A.; Althubiti, N.; Amos, K.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1084092
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