Accès ouvert
2024
preprint
OpenAlex
BESIII Collaboration, M. Ablikim, М. Н. Ачасов, P. Adlarson et autres
Using $7.9~\rm{fb^{-1}}$ of $e^+e^-$ collision data collected at $\sqrt{s}=3.773$ GeV with the BESIII detector at the BEPCII collider, we search for the massless dark photon with the flavor-changing neutral current processes $D^0\toωγ'$ and $D^0\toγγ'$ for the first time. No significant signals are …
Accès ouvert
2023
preprint
OpenAlex
BESIII Collaboration, M. Ablikim, M. N. Achasov, P. Adlarson et autres
Using 7.33 fb$^{-1}$ of $e^+e^-$ collision data collected by the BESIII detector at center-of-mass energies between 4.128 and 4.226~GeV, we observe for the first time the decay $D^{\pm}_s\to ωπ^{\pm}η$ with a statistical significance of 7.6$σ$. The measured branching fraction of this decay …
Accès ouvert
2022
preprint
OpenAlex
BESIII Collaboration, M. Ablikim, М. Н. Ачасов, P. Adlarson et autres
A search for a massless dark photon $γ^{\prime}$ is conducted using 4.5 $\mathrm{fb}^{-1}$ of $e^+e^-$ collision data collected at center-of-mass energies between 4.600 and 4.699 $\mathrm{GeV}$ with the BESIII detector at BEPCII. No significant signal is observed, and the upper limit on …