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.
Observation of the Radiative Decay Ds0*(2317)+ → Ds*+γ
Antonioli, C.;Gaz, A.;Stroili, R.;
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.File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
vcld-225s.pdf
accesso aperto
Tipologia:
Published (Publisher's Version of Record)
Licenza:
Creative commons
Dimensione
609.2 kB
Formato
Adobe PDF
|
609.2 kB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.




